Google forward deployed engineer interview

By FDE Interview Prep, a SourceStrongAI company

Three posters on Blind who finished Google’s FDE loop in July and August 2026 described two interviews: a coding question, or in one case a real-world streaming scenario, and a design round about AI agents. ^{[11, 12, 13, 14]}Source 11FDE Interview Experience at Google (L4)PublisherBlind (teamblind.com)Source typecandidate report on BlindSource 12Google FDE AdvicePublisherBlind (teamblind.com)Source typecandidate report on BlindSource 13Google FDE vs Remain Amazon SDEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 14Google L5 FDE vs Remain Amazon L5 SDEPublisherBlind (teamblind.com)Source typecandidate report on Blind Prepare for both, because in two reports a strong round did not carry a weak one. A Blind poster at L6 wrote, in July 2026, that the design round went well and the coding round did not, and neither did its redo. ^[15]Source 15URGENT!! GOOGLE FDE 4 (L6)PublisherBlind (teamblind.com)Source typecandidate report on Blind A commenter in a Reddit thread about Google Cloud’s GenAI FDE role wrote, in June 2026, of a strong hire in coding, mixed reviews on the design round, and no further consideration. ^{[16, 17]}Source 16Forward Deployed Engineer, GenAI, Google Cloud - EU (comment by u/Cool-Groot)PublisherReddit r/leetcodeSource typecandidate report on RedditSource 17Forward Deployed Engineer, GenAI, Google Cloud - EU (comment by u/Cool-Groot)PublisherReddit r/leetcodeSource typecandidate report on Reddit This guide keeps what Google publishes apart from what candidates report, then prepares you for both rounds, with a worked design opening and a coding exercise you can do tonight. For how FDE loops run across employers, start with the FDE interview guide.

Which Google role you are interviewing for

Google uses the exact title Forward Deployed Engineer, with numeric levels, such as “Forward Deployed Engineer IV, GenAI, Google Cloud” and “Forward Deployed Engineer III, Generative AI, Google Cloud”. ^{[1, 2]}Source 1Forward Deployed Engineer IV, GenAI, Google Cloud — Google CareersPublisherGoogleSource typecompany job postingSource 2Forward Deployed Engineer III, Generative AI, Google Cloud — Google CareersPublisherGoogleSource typecompany job posting The GenAI postings describe an embedded builder who codes, debugs and ships agentic solutions inside the customer’s environment, and set that against a traditional advisory role. ^[1]Source 1Forward Deployed Engineer IV, GenAI, Google Cloud — Google CareersPublisherGoogleSource typecompany job posting They also ask FDEs to build evaluation pipelines and observability for those agents, which matters for the design round below. ^[2]Source 2Forward Deployed Engineer III, Generative AI, Google Cloud — Google CareersPublisherGoogleSource typecompany job posting

The title turns up across several teams. Partner FDEs build agentic solutions with Google Cloud partners, inside the partners’ customers’ environments. ^[3]Source 3Partner Forward Deployed Engineer V, GenAI, Google Cloud — Google CareersPublisherGoogleSource typecompany job posting Google Public Sector’s FDE postings in Reston, Virginia list an active Top Secret/SCI clearance as a minimum qualification. ^{[6, 7]}Source 6Forward Deployed Engineer IV, Google Public Sector — Google CareersPublisherGoogleSource typecompany job postingSource 7Forward Deployed Engineer, GenAI, Google Public Sector — Google CareersPublisherGoogleSource typecompany job posting Google Cloud Consulting posts a Staff FDE role in Dublin, and YouTube posts a Lead GenAI FDE role on a newly formed internal team. ^{[5, 9]}Source 5Staff Forward Deployed Engineer, Google Cloud Consulting — Google CareersPublisherGoogleSource typecompany job postingSource 9Lead GenAI Forward Deployed Engineer, YouTube GTM Operations — Google CareersPublisherGoogleSource typecompany job posting

Two titles need care. A posting titled “Forward Deployed Engineer, Geo Auto” describes the job as a Technical Solutions Consultant role working with automotive partners. ^[18]Source 18Forward Deployed Engineer, Geo Auto — Google CareersPublisherGoogleSource typecompany job posting And as of September 2026, Google also posts AI Outcome Customer Engineer roles at levels II, III and IV, aligned with its FDE organization. ^{[19, 20, 21]}Source 19AI Outcome Customer Engineer III, Forward Deployed EngineeringPublisherGoogle CareersSource typecompany job postingSource 20AI Outcome Customer Engineer II, Forward Deployed EngineeringPublisherGoogle CareersSource typecompany job postingSource 21AI Outcome Customer Engineer IV, Forward Deployed EngineeringPublisherGoogle CareersSource typecompany job posting That is an adjacent title, not an FDE title. Its postings ask the holder to assess project feasibility and validate FDE engagement requests during technical evaluation, and they list experience in either system design or reading code as a minimum qualification. ^[19]Source 19AI Outcome Customer Engineer III, Forward Deployed EngineeringPublisherGoogle CareersSource typecompany job posting That describes the job, not the interview. The customer engineer comparison covers the Customer Engineer role next door.

Read the level on your posting before anything else. The FDE IV, GenAI posting asks for 8 years of software development in Python or similar languages, and the FDE III posting asks for 5. ^{[1, 2]}Source 1Forward Deployed Engineer IV, GenAI, Google Cloud — Google CareersPublisherGoogleSource typecompany job postingSource 2Forward Deployed Engineer III, Generative AI, Google Cloud — Google CareersPublisherGoogleSource typecompany job posting How to read an FDE job posting shows how to read the rest line by line.

Then read the travel and location lines. The Applied AI FDE III and IV postings list the ability to travel up to 50% of the time as a preferred qualification, and call the role high-travel. ^{[22, 23]}Source 22Forward Deployed Engineer III, Google Cloud, Applied AI — Google CareersPublisherGoogleSource typecompany job postingSource 23Forward Deployed Engineer IV, Applied AI, Google Cloud — Google CareersPublisherGoogleSource typecompany job posting The FDE IV, GenAI posting lets applicants name a preferred working location from a list of 25 US locations, Chicago and New York among them. ^[1]Source 1Forward Deployed Engineer IV, GenAI, Google Cloud — Google CareersPublisherGoogleSource typecompany job posting

In our September 2026 count of public postings, Google’s careers site had 57 postings whose titles matched our forward-deployed patterns, and none had “remote” in a location. ^[10]Source 10Our analysis: FDE posting censusPublisherfdeinterviewprep.com researchSource typeour analysis of public data The count matches titles, so it takes in adjacent titles such as the Geo Auto and AI Outcome Customer Engineer postings, not only FDE engineering jobs.

Why Google is hiring FDEs

On 12 May 2026, Google Cloud CEO Thomas Kurian posted that Google Cloud had announced a new AI-focused organization within its go-to-market team and is investing in hiring additional FDEs. ^[24]Source 24Thomas Kurian LinkedIn postPublisherLinkedIn (Thomas Kurian, CEO Google Cloud)Source typecompany website He added that having FDEs is not new for Google Cloud. ^[24]Source 24Thomas Kurian LinkedIn postPublisherLinkedIn (Thomas Kurian, CEO Google Cloud)Source typecompany website In April 2026, Google Cloud announced a $750 million partner fund that includes embedding Google FDEs alongside consulting firms and systems integrators such as Accenture, Deloitte and PwC. ^{[25, 26]}Source 25Google Cloud Commits $750 Million to Accelerate Partners' Agentic AI DevelopmentPublisherGoogle Cloud Press CornerSource typecompany websiteSource 26Google Cloud Next 2026 wrap-upPublisherGoogle Cloud BlogSource typecompany blog In September 2026, Google opened a Singapore Engineering Center and said Google Cloud is expanding investment in its regional FDE workforce. ^[27]Source 27Google Opens Singapore Engineering Center to Build and Export Enterprise Cloud and AI to the WorldPublisherGoogle Cloud Press CornerSource typecompany website

None of this describes the interview. Our reading is that it tells you what the job is for: getting agents into production at customers, directly and through partners. So bring one story in this shape: the customer, the agent you shipped, how you knew it worked, and the number that moved. Practice it with take me through one project in depth, which is free, and a prototype that ended up in production.

What Google publishes about hiring

Google publishes one page, How we hire, and it covers all roles. It is not specific to FDEs. ^[28]Source 28Our hiring process - Google CareersPublisherGoogleSource typecompany hiring page Here is what it says, stage by stage.

• Length. The page gives a rough length for the process in weeks, once interviews for a role have started, and says the process and timeline vary by role. ^[28]Source 28Our hiring process - Google CareersPublisherGoogleSource typecompany hiring page It covers every role at Google, so it tells you little about an FDE loop in particular.
• Assessments. Before interviews, you may be asked to take the Google Hiring Assessment, which measures workstyle skills, and possibly a role-related assessment such as a coding exercise. ^[28]Source 28Our hiring process - Google CareersPublisherGoogleSource typecompany hiring page Some roles ask for a small project first, such as a case study or writing or code samples. ^[28]Source 28Our hiring process - Google CareersPublisherGoogleSource typecompany hiring page
• Recruiter conversations. You will typically have one or two shorter conversations with your recruiter, over phone or video. ^[28]Source 28Our hiring process - Google CareersPublisherGoogleSource typecompany hiring page
• The panel. Then comes a panel of interviews, over video or in person, “with a rotating cast of Googlers”. ^[28]Source 28Our hiring process - Google CareersPublisherGoogleSource typecompany hiring page Google’s FDE postings add that in most instances the position requires in-person interviews. ^[1]Source 1Forward Deployed Engineer IV, GenAI, Google Cloud — Google CareersPublisherGoogleSource typecompany job posting
• Scoring. Google’s How we hire page, which covers all roles, says every candidate is assessed using clear rubrics. ^[28]Source 28Our hiring process - Google CareersPublisherGoogleSource typecompany hiring page Google does not publish the rubrics, for FDEs or anyone else.
• AI tools. The page says AI tools are not permitted during your interviews. ^[28]Source 28Our hiring process - Google CareersPublisherGoogleSource typecompany hiring page
• Reapplying. Google typically asks people to wait at least a year before reapplying for the same type of role. ^[28]Source 28Our hiring process - Google CareersPublisherGoogleSource typecompany hiring page

One report may change the AI rule for some interviews. Entrepreneur reported, in May 2026, on an internal Google document seen by Business Insider. ^[29]Source 29Google Is Testing a Transformative New Interview RulePublisherEntrepreneurSource typenews report Entrepreneur’s report says that from the second half of 2026, Google plans to let candidates use an AI assistant in its code comprehension interview, and that a Google spokesperson confirmed candidates in the pilot will use Gemini. ^[29]Source 29Google Is Testing a Transformative New Interview RulePublisherEntrepreneurSource typenews report Entrepreneur also reported that the pilot starts with select US teams hiring for early- and mid-career roles. ^[29]Source 29Google Is Testing a Transformative New Interview RulePublisherEntrepreneurSource typenews report Nothing we found ties it to FDE roles, so prepare to code without AI unless your recruiter says otherwise in writing.

The loop, as people describe it

Everything in this section comes from people who posted about their own interviews, with the month, and the role or level when they named one. No one publishes how often any of these shapes happens. The evidence map shows how to weigh reports like these.

Here are the reports side by side. Each poster described a coding or scenario question and a design or RRK round, and six of the seven describe that second round as about agents. The two rejected candidates who quoted their feedback were marked down on different rounds: one candidate reported, in May 2026, that the coding round “wasn’t strong”, and a Blind poster reported, that month, that the RRK was “not technical enough to face customers”. ^{[30, 31]}Source 30Rejected by Google (L3 FDE) after "killing" the domain round and solving the coding prompt. Feeling blindsided. (post by u/Superb_Pen9988)PublisherReddit r/FAANGrecruitingSource typecandidate report on RedditSource 31Google Rejected for FDE. Need immediate referralPublisherBlind (teamblind.com)Source typecandidate report on Blind

The posters call the design round Role-Related Knowledge, or RRK. Google publishes no round names for its FDE roles. One candidate wrote, in July 2026 and before taking either round, that after a recruiter screen of about 35 minutes they were told of two back-to-back 60-minute rounds, RRK and coding, with Python mandatory. ^{[33, 34]}Source 33Need help in preparation for Google Forward Deployed Engineer(FDE) interview (post by u/Wonderful-Ad6418)PublisherReddit r/leetcodeSource typecandidate report on RedditSource 34Need help in preparation for Google Forward Deployed Engineer(FDE) interview (comment by u/Wonderful-Ad6418)PublisherReddit r/leetcodeSource typecandidate report on Reddit

Here is what differs from one report to the next.

• Whether there is an assessment first. One candidate for a Google Cloud FDE I role reported, in May 2026, taking an online assessment before the recruiter call. ^[35]Source 35Google Cloud Forward deployed engineer FDE I (comment by u/New_Perspective_33)PublisherReddit r/FAANGrecruitingSource typecandidate report on Reddit A commenter replying to a post about the Applied AI FDE role wrote, that same month, that they got no assessment and went straight to two back-to-back interviews (the commenter did not name the company or role). ^[36]Source 36Google Forward deployed Engineer (comment by u/Inevitable_Clue_9877)PublisherReddit r/leetcodeSource typecandidate report on Reddit
• How hard the coding is. Posters on Blind described the coding question as anything from “almost leetcode easy/medium” to “leetcode medium hard”, and one who got an L5 offer wrote “No leetcode”. ^{[12, 13, 14, 31]}Source 12Google FDE AdvicePublisherBlind (teamblind.com)Source typecandidate report on BlindSource 13Google FDE vs Remain Amazon SDEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 14Google L5 FDE vs Remain Amazon L5 SDEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 31Google Rejected for FDE. Need immediate referralPublisherBlind (teamblind.com)Source typecandidate report on Blind
• Which design track. The L4 poster on Blind chose between an Agent Design track and one related to audio and video systems. ^[11]Source 11FDE Interview Experience at Google (L4)PublisherBlind (teamblind.com)Source typecandidate report on Blind An FDE III candidate who passed the coding round said, before their design round, that they would pick the workflow/enterprise option over the one on image and video generation, and later reported very positive feedback on both interviews. ^{[37, 38]}Source 37Google FDE - Forwarde Deployed Engineer Interview (post by u/Awkward-Money-9912)PublisherReddit r/leetcodeSource typecandidate report on RedditSource 38Google FDE - Forwarde Deployed Engineer Interview (comment by u/Awkward-Money-9912)PublisherReddit r/leetcodeSource typecandidate report on Reddit

The press picked up the short loop too. The Pragmatic Engineer reported, in May 2026, that it was “hearing” Google’s FDE process had been cut to as few as two interviews in two days, and it linked a single X post as its source. ^[39]Source 39The Pulse: Forward deployed engineering heats up againPublisherThe Pragmatic EngineerSource typenews report Treat that as one relayed account, not a second confirmation of the reports above.

The RRK round post goes deeper on the design round, with a worked answer to a different agentic design prompt.

After the interviews: team matching and headcount

Passing the interviews is not the same as an offer. Several posters describe waiting for a team, or for headcount, after good feedback.

• One poster at L5 wrote, in August 2026, that they had cleared all the interviews and were stuck in team match, and in another thread that there was no headcount. ^{[14, 40, 41, 42, 43]}Source 14Google L5 FDE vs Remain Amazon L5 SDEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 40Do not interview for Google FDE roles it's messed upPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 41Google FDE no headcount waitPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 42Do Google FDE interviews have the same question pool as SWEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 43Google FDE urgent - trade with MSFT referral - BlindPublisherBlindSource typecandidate report on Blind
• A second poster, who interviewed for L5 FDE Gen AI, wrote in September 2026 that they were told to wait for the next headcount, which they were told might take one year, and that their interview would stay valid for 18 months. ^{[40, 41, 42]}Source 40Do not interview for Google FDE roles it's messed upPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 41Google FDE no headcount waitPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 42Do Google FDE interviews have the same question pool as SWEPublisherBlind (teamblind.com)Source typecandidate report on Blind That is what a recruiter told one person, not a published rule.
• One candidate for FDE II/III reported, in June 2026, being moved to “finalist review”, then told an offer had become “highly improbable” because headcount had filled and leadership had paused new offers. ^[44]Source 44Google FDE II and III, Headcount Filled. (post by u/Efficient-Day-5062)PublisherReddit r/FAANGrecruitingSource typecandidate report on Reddit
• On the other side, one poster at L5 in New York, who got an offer, wrote in August 2026 that there was less than 2 weeks between interview and team matching. ^{[13, 14]}Source 13Google FDE vs Remain Amazon SDEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 14Google L5 FDE vs Remain Amazon L5 SDEPublisherBlind (teamblind.com)Source typecandidate report on Blind That is one person’s account, not a norm.

Headcount can also stop a loop early, or leave a finished one with nowhere to go. One Blind poster wrote, in June 2026, that their interviews were canceled because the positions were filled, and a commenter in a Blind thread about Google FDE interviews wrote, in July 2026, that they went through the full loop before learning there was no headcount (the commenter did not name the company or role). ^{[40, 41, 42, 45]}Source 40Do not interview for Google FDE roles it's messed upPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 41Google FDE no headcount waitPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 42Do Google FDE interviews have the same question pool as SWEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 45Google FDE interview experience/questions - BlindPublisherBlindSource typecandidate report on Blind So ask before you schedule, not after you pass. Send this:

“Before I schedule, can you confirm the team has open headcount at this level, and whether a pass goes straight to a team or into team match?”

Google does not publish how long team matching takes or how long results stay valid. After you pass, ask your recruiter both, and ask for the answer in writing. The team matching post covers what to do while you wait.

How to prepare for each stage

This is our method, built from what Google publishes and what the reports name. It is not a rubric Google publishes.

The recruiter screen and your level

Settle your level early, and learn to translate it. The postings name levels in Roman numerals, such as FDE III and IV. ^{[1, 2]}Source 1Forward Deployed Engineer IV, GenAI, Google Cloud — Google CareersPublisherGoogleSource typecompany job postingSource 2Forward Deployed Engineer III, Generative AI, Google Cloud — Google CareersPublisherGoogleSource typecompany job posting Posters write L4, L5 and L6, and two Blind posters paired the two: one interviewing for FDE III, GenAI wrote L5, and one interviewing for FDE 4 wrote L6. ^{[15, 32]}Source 15URGENT!! GOOGLE FDE 4 (L6)PublisherBlind (teamblind.com)Source typecandidate report on BlindSource 32Google FDE III (L5) - packet with director, how many days for decision?PublisherBlind (teamblind.com)Source typecandidate report on Blind So when a Blind poster with 10 years of experience reported, in May 2026, coding feedback of hire for L4, not L5, our reading is that it meant a step below FDE III. ^[31]Source 31Google Rejected for FDE. Need immediate referralPublisherBlind (teamblind.com)Source typecandidate report on Blind Have an answer ready to what level do you think you are, and why?, and know what you would say if the offer comes in a level below. The down-leveled offer post walks through how Google’s FDE III and IV bands overlap.

Then ask the recruiter what no public source settles. Each question below comes from a gap in the reports. Posters described a prep document for the coding round, a recruiter who said Python was mandatory and the design would happen in a Google Doc, and headcount that ran out after the loop. ^{[33, 34, 40, 41, 42, 46, 47, 48]}Source 33Need help in preparation for Google Forward Deployed Engineer(FDE) interview (post by u/Wonderful-Ad6418)PublisherReddit r/leetcodeSource typecandidate report on RedditSource 34Need help in preparation for Google Forward Deployed Engineer(FDE) interview (comment by u/Wonderful-Ad6418)PublisherReddit r/leetcodeSource typecandidate report on RedditSource 40Do not interview for Google FDE roles it's messed upPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 41Google FDE no headcount waitPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 42Do Google FDE interviews have the same question pool as SWEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 46GenAI Forward Deployed Engineer : RRK + Coding interviews in 2 weeks. Does my prep plan cover the coding round correctly? (post by u/Cylicium)PublisherReddit r/leetcodeSource typecandidate report on RedditSource 47Google Cloud FDE interview (comment by u/Purple_Insurance_538)PublisherReddit r/csMajorsSource typecandidate report on RedditSource 48Google Cloud Forward deployed engineer FDE I (post by u/New_Perspective_33)PublisherReddit r/FAANGrecruitingSource typecandidate report on Reddit

The coding round

Two posters preparing for Google Cloud FDE interviews wrote, in May and July 2026, that the prep material they were given described 30–50 lines of Python on OOP and fundamental system design. ^{[46, 47, 48]}Source 46GenAI Forward Deployed Engineer : RRK + Coding interviews in 2 weeks. Does my prep plan cover the coding round correctly? (post by u/Cylicium)PublisherReddit r/leetcodeSource typecandidate report on RedditSource 47Google Cloud FDE interview (comment by u/Purple_Insurance_538)PublisherReddit r/csMajorsSource typecandidate report on RedditSource 48Google Cloud Forward deployed engineer FDE I (post by u/New_Perspective_33)PublisherReddit r/FAANGrecruitingSource typecandidate report on Reddit One poster wrote that the prep document describes a static platform with no code execution. ^[49]Source 49GenAI Forward Deployed Engineer : RRK + Coding interviews in 2 weeks.PublisherReddit r/leetcodeSource typecandidate report on Reddit The May poster added that there could be one LeetCode question, and a commenter in a thread about Google Cloud FDE interviews wrote, that same month, that their recruiter said medium LeetCode while the document they were sent said Python OOP and system design (the commenter did not name the company or role). ^{[46, 47, 48]}Source 46GenAI Forward Deployed Engineer : RRK + Coding interviews in 2 weeks. Does my prep plan cover the coding round correctly? (post by u/Cylicium)PublisherReddit r/leetcodeSource typecandidate report on RedditSource 47Google Cloud FDE interview (comment by u/Purple_Insurance_538)PublisherReddit r/csMajorsSource typecandidate report on RedditSource 48Google Cloud Forward deployed engineer FDE I (post by u/New_Perspective_33)PublisherReddit r/FAANGrecruitingSource typecandidate report on Reddit Prepare both.

For the class-writing half, practice on paper. Here is an exercise we wrote to that shape, not a question Google asked: a small class that caps how much each customer’s agent can spend on tool calls in a rolling window. Write it without running it.

from collections import defaultdict, deque

class ToolBudget:
    """Caps how much each tenant's agent can spend on tool calls
    in a rolling window, e.g. 100 units per 60 seconds."""

    def __init__(self, limit, window_s):
        if limit <= 0 or window_s <= 0:
            raise ValueError("limit and window must be positive")
        self.limit = limit
        self.window_s = window_s
        self._calls = defaultdict(deque)  # tenant -> deque of (time, cost)
        self._spent = defaultdict(int)    # tenant -> cost in window

    def _expire(self, tenant, now):
        calls = self._calls[tenant]
        while calls and calls[0][0] <= now - self.window_s:
            _, cost = calls.popleft()
            self._spent[tenant] -= cost

    def allow(self, tenant, cost, now):
        if cost <= 0:
            raise ValueError("cost must be positive")
        self._expire(tenant, now)
        if self._spent[tenant] + cost > self.limit:
            return False
        self._calls[tenant].append((now, cost))
        self._spent[tenant] += cost
        return True

    def remaining(self, tenant, now):
        self._expire(tenant, now)
        return self.limit - self._spent[tenant]

Now run it by hand, out loud, the way you would on a platform with no run button. Take a budget with limit=10 and window_s=60:

1. allow("acme", 6, now=0) returns True.
2. allow("acme", 5, now=30) returns False, because 6 + 5 is over the limit.
3. allow("acme", 4, now=30) returns True: landing exactly on the limit is allowed.
4. allow("globex", 10, now=30) returns True, because one tenant never spends another’s budget.
5. allow("acme", 6, now=60) returns True, because the first call has just left the window. That is the boundary case: a call exactly window_s old no longer counts.

Then say the design choices before you are asked:

“Time is passed in, not read from the clock, so I can test it without sleeping. Each call is amortized O(1). Memory is one entry per recent call plus one per tenant, and a tenant’s old entries clear only on its next call, so tenants that go quiet need a periodic sweep. If two threads share it, I’d guard it with a lock; if several servers share it, the state moves to a shared store.”

Prepare the scenario shape as well. One poster described a real-scenario question about streaming. ^{[13, 14]}Source 13Google FDE vs Remain Amazon SDEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 14Google L5 FDE vs Remain Amazon L5 SDEPublisherBlind (teamblind.com)Source typecandidate report on Blind Work through trip summaries from a stream of ride events, late events included, and a stream consumer with backpressure, and state the complexity of your answer without being asked, as in state the time and space complexity of your solution. Model a small inventory system with classes is a second class-design exercise, and a per-user token bucket rate limiter, which is free, takes the ToolBudget idea across several processes.

Do not treat coding as the easy half. In the table above, two candidates reported that the coding round went wrong for them. ^{[15, 30]}Source 15URGENT!! GOOGLE FDE 4 (L6)PublisherBlind (teamblind.com)Source typecandidate report on BlindSource 30Rejected by Google (L3 FDE) after "killing" the domain round and solving the coding prompt. Feeling blindsided. (post by u/Superb_Pen9988)PublisherReddit r/FAANGrecruitingSource typecandidate report on Reddit The L4 poster on Blind reported no AI tools in the coding round, which matches Google’s page. ^{[11, 28]}Source 11FDE Interview Experience at Google (L4)PublisherBlind (teamblind.com)Source typecandidate report on BlindSource 28Our hiring process - Google CareersPublisherGoogleSource typecompany hiring page What FDE coding rounds test covers the round across employers, and the LeetCode post covers how much algorithm practice to do.

The RRK or agentic design round

The L4 poster on Blind wrote, in July 2026, that the round was a role-play in which the interviewer acted as the CTO of a company that wanted a smart AI-powered system, and that the discussion ran from problem discovery and requirements through scoping, architecture, deployment, scalability, security and evaluation. ^{[11, 50]}Source 11FDE Interview Experience at Google (L4)PublisherBlind (teamblind.com)Source typecandidate report on BlindSource 50Is Google FDE interview same as SWE? - BlindPublisherBlindSource typecandidate report on Blind One candidate wrote, in July 2026, that the recruiter said the design happens in a Google Doc. ^{[33, 34]}Source 33Need help in preparation for Google Forward Deployed Engineer(FDE) interview (post by u/Wonderful-Ad6418)PublisherReddit r/leetcodeSource typecandidate report on RedditSource 34Need help in preparation for Google Forward Deployed Engineer(FDE) interview (comment by u/Wonderful-Ad6418)PublisherReddit r/leetcodeSource typecandidate report on Reddit Treat it as a customer conversation first and a diagram second.

Watch the clock while you ask questions. One candidate’s report on Aced, for a mid-level FDE role in Poland, says the interviewer gave a very abstract description of the system, which the candidate believes was intentional, and that by the time the questions were done, time was almost up. ^[51]Source 51Google Forward Deployed Engineer Interview ExperiencePublisherAced (formerly Exponent)Source typecandidate’s personal write-up Ask the questions that change the design, say your assumptions for the rest, and get a first version on the page early.

Here is what that sounds like, on a practice prompt we wrote, not one Google asked.

CTO: “We’re a regional bank. Relationship managers spend hours pulling numbers for client reviews. I want an AI agent that does it.”

You: “Before I draw anything, a few questions. Who reads the output: the manager, or the client? Where do the numbers live, and can the agent read them with the manager’s own permissions? And what does one wrong number cost you: an awkward call, or a compliance finding?”

Each question changes the design. Who reads it decides whether a person checks every draft. Where the data lives decides the tools and the permissions. The cost of a wrong number decides how strict the tests are.

Say the answers are: internal drafts for the manager, a warehouse the bank already queries, and a compliance finding. Say those assumptions out loud, then type version one into the doc as plain text, which is quick to write and easy to change while the CTO talks:

Manager asks in chat
  -> agent (fixed tool list, manager's own credentials)
       get_accounts(client_id)          read-only
       run_approved_query(name, params) vetted SQL only
       fetch_notes(client_id)           read-only
  -> draft brief: every figure links to the query that produced it
  -> manager edits and sends; the agent never sends
Limits: no write tools, step budget, refuse queries off the list
Evals: past briefs with known figures; a figure that does not
       match its source fails the run

Walk it top to bottom, one sentence per line, then close with how it ships:

“I’d ship it as drafts to a handful of managers, count the figures they correct, and widen it only when that count stays at zero.”

Expect the CTO to push on one line. If it is the query tool, say why a list of vetted queries beats letting the model write SQL: every number traces back to a query someone reviewed, and an instruction hidden in a client note cannot make the agent write a query nobody vetted. If it is the step budget, say what happens when the agent hits it: it stops and hands back what it has, with a note, instead of looping. The ToolBudget class from the coding section is the same idea, applied per customer over a time window.

Go below the boxes. A commenter in a Blind thread about Google’s FDE interview wrote, in August 2026, that the round can stay at high-level agent orchestration but that they went lower, to prompts, state machines, retries and handling hallucinations (the commenter did not name the company or role). ^[50]Source 50Is Google FDE interview same as SWE? - BlindPublisherBlindSource typecandidate report on Blind The L5 poster on Blind named evals and guardrails. ^{[13, 14]}Source 13Google FDE vs Remain Amazon SDEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 14Google L5 FDE vs Remain Amazon L5 SDEPublisherBlind (teamblind.com)Source typecandidate report on Blind The GenAI postings ask FDEs to build evaluation pipelines and observability for agentic systems, so say how you would know the agent works before you are asked. ^[2]Source 2Forward Deployed Engineer III, Generative AI, Google Cloud — Google CareersPublisherGoogleSource typecompany job posting Practice with design an evaluation harness for a support agent and how do you know your AI system works?, and read the agentic system design post.

For follow-up questions to practice, one Blind post about a Senior FDE phone screen, from July 2026, lists agent orchestration, safety guardrails, stuck agents or infinite loops, monitoring and human-in-the-loop workflows, plus a short identifier-conversion coding problem and a repo-wide migration discussion. ^[52]Source 52Google Forward Deployed Engineer Interview Experience - BlindPublisherBlindSource typecandidate report on Blind The poster said they collect interview stories for a website, so treat it as a practice list, not a first-hand account. For the guardrails item, work through defending a support agent against prompt injection; for the rest, have one sentence ready on how you would detect it and what the agent does next.

Prepare a classic answer too. A Reddit commenter, the one at the top of this guide, wrote, in June 2026, that the design questions were classic system design, presented as a production agent, and that after a strong hire in coding and mixed reviews on the RRK, they were not considered (the commenter did not name the company). ^{[16, 17]}Source 16Forward Deployed Engineer, GenAI, Google Cloud - EU (comment by u/Cool-Groot)PublisherReddit r/leetcodeSource typecandidate report on RedditSource 17Forward Deployed Engineer, GenAI, Google Cloud - EU (comment by u/Cool-Groot)PublisherReddit r/leetcodeSource typecandidate report on Reddit And the Blind poster rejected after a deeply technical RRK wrote that the feedback was “not technical enough to face customers or something like that”. ^[31]Source 31Google Rejected for FDE. Need immediate referralPublisherBlind (teamblind.com)Source typecandidate report on Blind Our reading: the round wants both depth and a way of explaining it to a customer. Enterprise system design is not ‘design a social network’ covers the enterprise version.

If you are offered a choice of track, pick the one you have built in, and have one real system of your own ready to draw.

If you come from data or enterprise platforms

If you have built pipelines, warehouses or data platforms rather than agents, a lot of this loop is yours already.

• The streaming scenario is home ground. Say late events, watermarks and idempotent writes before you are asked, and practice with trip summaries from a stream of ride events and a stream consumer with backpressure.
• The gap is agent-specific. Tool permissions, step budgets and evals are what to learn first. Start with the evaluation harness question and the bank opening above.
• The work sits where you already do. Under the partner fund above, Google will embed FDEs alongside consulting firms and systems integrators. ^{[25, 26]}Source 25Google Cloud Commits $750 Million to Accelerate Partners' Agentic AI DevelopmentPublisherGoogle Cloud Press CornerSource typecompany websiteSource 26Google Cloud Next 2026 wrap-upPublisherGoogle Cloud BlogSource typecompany blog In September 2026, Google Cloud and Accenture launched a business group that will establish a 1,000-person FDE workforce. ^{[53, 54]}Source 53Accenture and Google Cloud Deepen Partnership with Formation of New Accenture Gemini Enterprise Business GroupPublisherGoogle Cloud Press CornerSource typecompany websiteSource 54Google and Accenture are putting 1,000 engineers inside client officesPublisherThe Next WebSource typenews report And at Google Cloud Next in April 2026, Google announced Gemini Enterprise Agent Platform, which it describes as the evolution of Vertex AI, for building, scaling, governing and optimizing agents. ^[55]Source 55Next '26 day 1 recapPublisherGoogle Cloud BlogSource typecompany blog No report we found names that platform as an interview topic, but knowing it lets you say where a Google customer’s agents would be built and governed.

Pay, in short

The posted bands are listed on this page. In our September 2026 count of public postings, 19 of Google’s 57 matching postings stated a US range, from $152,000 to $364,000, and the postings do not say whether the range is base or total. ^{[3, 4, 10]}Source 3Partner Forward Deployed Engineer V, GenAI, Google Cloud — Google CareersPublisherGoogleSource typecompany job postingSource 4Forward Deployed Engineer Manager, Applied AI, Google Cloud — Google CareersPublisherGoogleSource typecompany job postingSource 10Our analysis: FDE posting censusPublisherfdeinterviewprep.com researchSource typeour analysis of public data As of September 2026, $152,000 is where two postings that are not FDE engineering jobs start: the Geo Auto posting, which describes a Technical Solutions Consultant job, and the AI Outcome Customer Engineer II posting, an adjacent title, and neither says whether the range is base or total. ^{[18, 19, 20, 21]}Source 18Forward Deployed Engineer, Geo Auto — Google CareersPublisherGoogleSource typecompany job postingSource 19AI Outcome Customer Engineer III, Forward Deployed EngineeringPublisherGoogle CareersSource typecompany job postingSource 20AI Outcome Customer Engineer II, Forward Deployed EngineeringPublisherGoogle CareersSource typecompany job postingSource 21AI Outcome Customer Engineer IV, Forward Deployed EngineeringPublisherGoogle CareersSource typecompany job posting

The lowest US FDE engineering band on this page is FDE III, Generative AI: as of September 2026, $174,000 to $252,000 plus a 15% bonus target, equity and benefits, and the posting does not say whether the range is base or total. ^[2]Source 2Forward Deployed Engineer III, Generative AI, Google Cloud — Google CareersPublisherGoogleSource typecompany job posting

One Blind poster reported, in August 2026, an L5 offer in New York of $232,000 base, a 15% bonus target, a $25,000 sign-on bonus and $310,000 in stock over four years. ^{[13, 14]}Source 13Google FDE vs Remain Amazon SDEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 14Google L5 FDE vs Remain Amazon L5 SDEPublisherBlind (teamblind.com)Source typecandidate report on Blind That is one person’s offer, not a band, though its base sits inside the FDE III range above.

Is it paid like software engineering? Two Blind posters relayed different recruiter answers, both in June 2026: one was told regular software engineers and FDEs are on the same pay bands, and the other that FDE pay can be higher at the same level because of market demand and customer-facing scope. ^{[56, 57]}Source 56Google L5 Offer Ridiciously Low? - BlindPublisherBlindSource typecandidate report on BlindSource 57Google Cloud FDE role - BlindPublisherBlindSource typecandidate report on Blind Ask your own recruiter.

For a second view, in H-1B filings certified from October 2024 to June 2026, Google LLC had one certified filing under our forward-deployed title patterns, a Forward Deployed Engineer in New York with an offered base wage of $174,000 a year. ^[58]Source 58LCA_Disclosure_Data_FY2026_Q3.xlsx (DOL OFLC LCA disclosure data)PublisherUS Department of Labor, Office of Foreign Labor CertificationSource typeUS Department of Labor filing dataHow we used this data One filing is not a median, and filings record base wage only. The FDE salary guide sets these against other employers.

A practice plan for each round

Everything in the Free column costs nothing; the In Pro column is where the practice goes deeper.

Everything in the In Pro column, including the claim-intake case, where an insurer has already licensed a language model and wants it taking first reports of claims, is in Pro, which starts with a 7-day free trial.

You can practice coding by yourself. The CTO role-play, where someone asks what you would ask first and why your design holds up, is the part that goes wrong under pressure. The free case is not about agents, but it drills the part that comes before any diagram: scoping a vague ask out loud. The free practice case puts you in front of an AI customer with a vague problem on a 10-minute clock: you scope it, propose a first version and say how you would know it works, then a scorecard shows what you asked and what you missed. It is free with a sign-in.

Practice for Google

What this guide recommends. The Pro tag marks what is in Pro; a Pro question’s framework is still free, and its model answer is in Pro.

• QuestionDesign an evaluation harness that runs before every change to a customer-facing support agent.
• LessonWhat FDE coding rounds test, by the evidence
• CaseBuilding permits take months
• QuestionA customer asks how you know your AI system works. Answer them.

22 more recommended 12 questions and 10 lessonsShowHide

Questions

• Implement a per-user token bucket rate limiter. Then make it work across several processes.
• A support agent reads customer emails and can issue refunds. How do you defend it against prompt injection?
• What level do you think you are, and why?
• Pick one project from your résumé and take me through it in depth: the problem, your design, what broke and what you would change.
• When would you fine-tune, when would you use retrieval, and when is prompting enough? Use a real example.
• A non-technical VP asks why the assistant cannot be right every time. Explain in two minutes.
• Process a stream of ride events and emit trip summaries when trips end, handling late events.Pro
• Model a small inventory system with classes in about a page of code. Then add a new requirement I give you.Pro
• Write a consumer that processes a stream with a bounded buffer and applies backpressure.Pro
• State the time and space complexity of your solution and say when it would matter in production.Pro
• The offer came in one level below the one you interviewed for. What do you say to the recruiter?Pro
• Tell me about a prototype that ended up in production. What did you have to fix first?Pro

Lessons

• Enterprise system design is not ‘design a social network’
• The evidence map: what employers publish, what candidates report, how to read both
• Clarify before you solve: the first minutesPro
• Explaining AI limits to non-technical leadersPro
• AI assistance rules, by company and by stagePro
• Algorithm screens: the problems reported at Google, Palantir and C3 AIPro
• Agent architecture: tools, permissions and memoryPro
• Evals for agents, and rolloutPro
• The agentic design round: a customer’s CTO wants agentsPro
• Online assessments and AI-run screensPro

Posts about Google

Each takes one part of this guide further.

1. Company loops

   Google FDE interview: the RRK round and the agentic design role-play candidates describe

   RRK is Google’s role-related knowledge round. What FDE candidates report it covers, and a worked answer to an agentic design prompt.

   11 min readPublished September 2026

2. Company loops

   Passed the Google FDE loop but stuck in team matching? What candidates report and what to do

   You passed the Google FDE interviews and then heard nothing. What candidates report about team matching and headcount, and what to do while you wait.

   10 min readPublished September 2026

3. Company loops

   Google Cloud customer engineer vs forward deployed engineer: same company, different jobs

   Google Cloud customer engineer vs forward deployed engineer: what each posting says the job is, how pay is structured, and what candidates report.

   10 min readPublished September 2026

4. Interview rounds

   Agentic system design interview: tools, permissions, stuck agents and hand-off to a person

   Design a safe agent in the interview: tool allowlists, scoped credentials, loop and cost budgets, idempotent actions, human approval and evals.

   11 min readPublished September 2026

5. Pay and offers

   Down-leveled on your FDE offer? What candidates report and how to respond

   You interviewed for senior; the FDE offer is one level lower. What candidates report, what leveling changes, and how to ask for the evidence behind it.

   11 min readPublished September 2026

See all 8 posts 3 more about GoogleShowHide

1. What the evidence says

   Do FDE interviews have LeetCode? What employers publish and candidates report, company by company

   Some FDE loops include LeetCode-style rounds and some have dropped them. What employers publish, what candidates report, and how to split your prep.

   11 min readPublished September 2026

2. What the evidence says

   Which companies allow AI tools in interviews? The published rules, by stage

   Some employers expect you to use an AI assistant in interviews; others may disqualify you if you do. The published rules by company and stage, dated.

   10 min readPublished September 2026

3. The FDE role

   FDE jobs that need a security clearance: who asks, which level, and what it changes

   Which FDE postings ask for a security clearance, from Secret to TS/SCI with polygraph, the citizenship rules, and how to answer the clearance question.

   11 min readPublished September 2026

Questions people ask

What is the Google FDE interview process, and what do candidates report?

Google does not publish an FDE-specific process. Its How we hire page, for all roles, describes one or two shorter recruiter conversations, then a panel of interviews over video or in person, with every candidate assessed using clear rubrics, and it says you may take a workstyle assessment or a coding exercise first. Two posters on Blind who finished the FDE loop in July 2026 each described two interviews: a coding round and a design round about agentic systems.^{[11, 12, 28]}Source 11FDE Interview Experience at Google (L4)PublisherBlind (teamblind.com)Source typecandidate report on BlindSource 12Google FDE AdvicePublisherBlind (teamblind.com)Source typecandidate report on BlindSource 28Our hiring process - Google CareersPublisherGoogleSource typecompany hiring page

What do candidates report about the RRK round in the Google FDE interview?

Posters call the design round Role-Related Knowledge, or RRK. Google publishes no round names for FDE roles. One candidate reported, in May 2026, an RRK round on multi-agent systems, RAG and GenAI implementation, and another wrote, in July 2026 and before the round, that the recruiter described it as one real-world business problem needing a scalable AI solution, designed in a Google Doc.^{[30, 33, 34]}Source 30Rejected by Google (L3 FDE) after "killing" the domain round and solving the coding prompt. Feeling blindsided. (post by u/Superb_Pen9988)PublisherReddit r/FAANGrecruitingSource typecandidate report on RedditSource 33Need help in preparation for Google Forward Deployed Engineer(FDE) interview (post by u/Wonderful-Ad6418)PublisherReddit r/leetcodeSource typecandidate report on RedditSource 34Need help in preparation for Google Forward Deployed Engineer(FDE) interview (comment by u/Wonderful-Ad6418)PublisherReddit r/leetcodeSource typecandidate report on Reddit

Is the Google FDE coding round LeetCode? What candidates report

Reports differ. Posters on Blind described the coding question as anything from almost LeetCode easy or medium to medium-hard, and one poster who got an L5 offer in August 2026 said there was no LeetCode, only a real-scenario question about streaming. A poster preparing in July 2026 wrote that the official prep document describes 30–50 lines of Python on a static platform with no code execution, evaluating Python OOP and fundamental software system design.^{[12, 13, 14, 31, 49]}Source 12Google FDE AdvicePublisherBlind (teamblind.com)Source typecandidate report on BlindSource 13Google FDE vs Remain Amazon SDEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 14Google L5 FDE vs Remain Amazon L5 SDEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 31Google Rejected for FDE. Need immediate referralPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 49GenAI Forward Deployed Engineer : RRK + Coding interviews in 2 weeks.PublisherReddit r/leetcodeSource typecandidate report on Reddit

Can I use AI tools in a Google FDE interview?

No. Google’s How we hire page, which covers all roles, says AI tools are not permitted during interviews.^[28]Source 28Our hiring process - Google CareersPublisherGoogleSource typecompany hiring page

Are Google FDE interviews in person?

Google’s FDE postings say that in most instances the position requires in-person interviews as part of the hiring process. Ask your recruiter whether yours is.^[1]Source 1Forward Deployed Engineer IV, GenAI, Google Cloud — Google CareersPublisherGoogleSource typecompany job posting

What L level is Google FDE III? What Blind posters report

Google’s postings use Roman numerals, such as Forward Deployed Engineer III and IV, while Blind posters describe levels as L4, L5 and L6. Two Blind posters paired them: one interviewing for FDE III, GenAI wrote L5, in August 2026, and one interviewing for FDE 4 wrote L6, in July 2026. Confirm yours with your recruiter.^{[1, 2, 11, 15, 32]}Source 1Forward Deployed Engineer IV, GenAI, Google Cloud — Google CareersPublisherGoogleSource typecompany job postingSource 2Forward Deployed Engineer III, Generative AI, Google Cloud — Google CareersPublisherGoogleSource typecompany job postingSource 11FDE Interview Experience at Google (L4)PublisherBlind (teamblind.com)Source typecandidate report on BlindSource 15URGENT!! GOOGLE FDE 4 (L6)PublisherBlind (teamblind.com)Source typecandidate report on BlindSource 32Google FDE III (L5) - packet with director, how many days for decision?PublisherBlind (teamblind.com)Source typecandidate report on Blind

How much does a Google forward deployed engineer make?

As of September 2026, Google’s FDE III, Generative AI posting lists US pay of $174,000 to $252,000 plus a 15% bonus target, equity and benefits, and its FDE IV postings list $207,000 to $300,000 plus a 20% bonus target, equity and benefits. The postings do not say whether the range is base or total.^{[1, 2, 23]}Source 1Forward Deployed Engineer IV, GenAI, Google Cloud — Google CareersPublisherGoogleSource typecompany job postingSource 2Forward Deployed Engineer III, Generative AI, Google Cloud — Google CareersPublisherGoogleSource typecompany job postingSource 23Forward Deployed Engineer IV, Applied AI, Google Cloud — Google CareersPublisherGoogleSource typecompany job posting

What do candidates report happens after they pass the Google FDE interviews?

Team matching. Posters describe very different waits: one L5 poster in New York reported, in August 2026, less than 2 weeks between interview and team matching, while others wrote that they were stuck in team match or told to wait for headcount. Google does not publish how long it takes, so ask your recruiter what is blocking the match.^{[13, 14, 40, 41, 42, 44]}Source 13Google FDE vs Remain Amazon SDEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 14Google L5 FDE vs Remain Amazon L5 SDEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 40Do not interview for Google FDE roles it's messed upPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 41Google FDE no headcount waitPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 42Do Google FDE interviews have the same question pool as SWEPublisherBlind (teamblind.com)Source typecandidate report on BlindSource 44Google FDE II and III, Headcount Filled. (post by u/Efficient-Day-5062)PublisherReddit r/FAANGrecruitingSource typecandidate report on Reddit

What is an AI Outcome Customer Engineer at Google?

An adjacent title, not an FDE title. As of September 2026, Google posts it at levels II, III and IV, aligned with its Forward Deployed Engineering organization. The postings describe bridging pre-sales agreement shaping and post-sales execution, assessing project feasibility and validating FDE engagement requests.^{[19, 20, 21]}Source 19AI Outcome Customer Engineer III, Forward Deployed EngineeringPublisherGoogle CareersSource typecompany job postingSource 20AI Outcome Customer Engineer II, Forward Deployed EngineeringPublisherGoogle CareersSource typecompany job postingSource 21AI Outcome Customer Engineer IV, Forward Deployed EngineeringPublisherGoogle CareersSource typecompany job posting

Keep reading

Guides

• The forward deployed engineer interview, round by round
• Forward deployed engineer salary: what employers post and file
• What is a forward deployed engineer?

Other companies

• Databricks forward deployed engineer interview
• OpenAI forward deployed engineer interview
• Palantir forward deployed engineer interview
• All company guides