How do you prepare for a forward deployed engineer interview?

This note collects what employers and former hiring leads have published about how they interview for the role, and what open postings in Switzerland ask for. It is drawn from published sources only. For the role itself, see the guide: What is a forward deployed engineer?

What do the sources say an interview tests?

Three things, in the accounts that are public. The number in brackets is the source in the list at the end.

How high is the engineering bar?

As high as for a software engineer, in the accounts of the companies that shaped the role.

First Round's head of talent, a former Palantir recruiter, says in First Round Review that the company's forward deployed engineers "had to pass the same interview loops and facets as software engineers" [1]. The same article says of the role that "Engineer" is still an essential part of the job title [1]. The person who led the equivalent role at Ironclad says in it that many of the best people in that role could also have gone on to become a staff engineer at a top technology company [1].

Postings say which tools to expect. In Bloomberry's sample of about 1,000 postings, 66 percent mention Python and 35 percent mention TypeScript. 35 percent mention AI agents and 31 percent mention experience with large language models [2].

Postings that were open in Switzerland on 14 November 2026 name their own stacks:

• OpenAI's Zurich posting asks for production-grade code "across frontend and backend using Python, JavaScript, or comparable stacks", and for experience with systems built on large language models [3].
• Salesforce asks its senior forward deployed engineer in Zurich for fluency in at least two of Python, JavaScript or TypeScript, Java and Apex [4].
• Blockstream asks for at least one systems or backend language, and gives Python, Go and Rust as examples [5].
• DeepJudge asks for experience with technologies such as Kubernetes, Docker, Azure or GCP [6].
• Laelaps AI asks for strong Python and hands-on C++, and for experience running software on-premise or at the edge [7].
• Scalera names its platform stack: React, Next.js and Python with FastAPI [8].

Read the posting for the role you apply to, and prepare in the stack it names.

What is an open problem interview?

It is a scenario with no single right answer, where the interviewer watches how the candidate reasons about the customer and about the technology at once.

A former Palantir engineer who went on to lead recruiting for the role there describes the approach in First Round Review. Palantir, she says, built its interviews for the role around the real technical challenges it was trying to solve for customers, and moved away from the classic coding interview. The article adds a caution in its own heading: "don't skip the coding test". One scenario: "We would explain insider trading to the candidate and ask them to design a solution: What data would they need, what questions would they ask the customer, what would they look for?" The aim was to assess business reasoning and technical reasoning together [1].

The three questions inside that scenario are a usable frame for practice: what data is needed, what to ask the customer, and what to look for.

OpenAI's Zurich posting describes the same work as part of the job. The engineer owns "discovery, technical scoping, system design, build, and production rollout" [3]. PostHog's public handbook for its forward deployed team shows what a scoping answer contains: a measurable outcome, a rough timeline and a shared definition of done, written as a short brief that the customer confirms [9].

Which story should you bring?

One piece of real work that you shipped, told from the problem to the result.

Ironclad's most effective interview tactic, in the words of the person who led the equivalent role there, was to ask candidates "to present a problem from their career and teach us how they used technology to solve it" [1]. Salesforce writes the same expectation into its Zurich posting for a senior forward deployed engineer: "at least one production system you can walk us through" [4].

First Round Review reports two traits that hiring leads looked for in those stories. One is building without being asked. In the words of the former Palantir recruiting lead, "The best FDEs I worked with were compulsive builders" [1]. The other is grit, which she describes as a "willingness to eat pain" [1].

What should you ask the employer?

Ask what the week looks like. The title covers different jobs, and the sources say so.

• Bloomberry classed about 60 percent of the postings in its sample as builder roles, about 30 percent as closer to sales engineering and about 10 percent as internal tools roles [2].
• The Pragmatic Engineer reported in March 2026 that some engineers work out the nature of the role during the interview process and pass on it, and that others take the job and leave. It quotes one who left after four weeks [10].
• First Round Review puts the same question to founders who plan to hire for the role: "What would this person's day-to-day work look like?" [1]

Five questions follow from what the sources and the postings state.

1. How much of the week is spent writing code that runs in production at the customer?
2. Does the work reach the core product, and how?
3. How much travel does the role involve? In Bloomberry's sample, 68 percent of roles require travel [2]. Of ten postings read in Switzerland on 14 November 2026, three state about half the time and one states none. The detail is in the note on Swiss postings.
4. Which languages do the customers work in? Three of those ten postings require German or French.
5. Which team does the role sit in? In Bloomberry's sample, 45 percent of postings place it in a team of its own, 38 percent in engineering and 14 percent in sales or go-to-market [2].

Where do people in the role come from?

Mostly from other engineering jobs, in the one published count the club has found.

Bloomberry looked at 100 LinkedIn profiles of people in the role. 45 percent had been software engineers before, 22 percent solutions engineers or architects, 15 percent data engineers or data scientists, 10 percent technical consultants and 8 percent founders or early employees [2]. Of the postings in its sample that name a level of experience, 60 percent ask for three to five years [2].

The postings open in Switzerland on 14 November 2026 ask for three to seven years. Roles that are open now are on the roles list. People moving into the role can apply to FDE Club.

Sources

Each source was opened on 14 November 2026.

1. First Round Review: So You Want to Hire a Forward Deployed Engineer, February 2026
2. Bloomberry: What I learned analyzing 1K forward deployed engineer jobs, updated January 2026
3. OpenAI: Forward Deployed Engineer, Zurich, job posting
4. Salesforce: Senior Forward Deployed Engineer, Zurich, job posting
5. Blockstream: Forward Deployed Engineer, Switzerland, job posting
6. DeepJudge: Forward Deployed Engineer, Zurich, job posting
7. Laelaps AI: Forward Deployed Engineer, Zurich, job posting
8. Scalera: Forward Deployed Engineer, Zurich or Germany, job posting
9. PostHog handbook: How forward deployed engineers work
10. The Pragmatic Engineer: Is the FDE role becoming less desirable?, March 2026