Palantir interview, and the decomposition round.

Most engineering candidates finish in three to four weeks. Deployment strategists tend to be quicker at two to three, and product designers slower at four to eight because the design challenge runs asynchronously. Palantir does not publish who makes the final call, so accounts describing a hiring-manager-led decision are community-reported rather than official.

Decomposition is about an hour, with little or no code, in two phases. In the first you clarify the problem and agree an approach with the interviewer; in the second you sketch the design, the data model and the APIs, and scope a first version. Candidates report four prompts by name. What they share is that none of them says who the user is, so finding the user is the first move every time.

• Design a sync system between two employee record systems: Ask which system is the source of truth, how often records change, how many there are, and what in sync means to the HR person who relies on it. Then define the shared data model, the rule for conflicting edits, and how changes move between the systems, and ship one direction of sync first.
• Improve traffic in New York City: Pick the user before the solution: a commuter, a city planner, a delivery fleet. For a planner, the decision might be which junctions to retime; say what data you would need (sensors, signal timings, incidents), how fresh it has to be, and the one measure that would show it worked.
• A logistics client is losing money on deliveries: find out why, using only the data they already have: Start from the money: cost per delivery broken down by route, driver, time and failure reason. Ask what tables exist and how they join, name the few queries you would run first, and turn the finding into something the operations lead can act on this week.
• Design technology to help elderly people with poor vision cook for themselves: Spend the first minutes on the user: what they can and cannot do, what goes wrong in a kitchen, who else is involved. Scope one narrow first version, for example spoken step-by-step guidance for a few recipes, and say how you would test it with real users.
• The mistakes candidates report: Opening with a memorised consulting framework, and thinking in silence. Let the structure come from your clarifying questions, and narrate every assumption so the interviewer can correct you early.

Practise out loud against a clock: take a big, vague problem, give yourself an hour, and move through user, decision, data, data model, APIs, first version and success metric.

Palantir screens for a specific temperament more openly than most companies do, and it says plainly that technical strength alone does not carry a candidate through.

• Conviction about the mission, tied to a product. An answer that names Gotham, Foundry or AIP and what it does survives the follow-up. One about interesting data problems does not
• A considered position on government and defence work. The loop asks, and an honest answer is acceptable where an unconsidered one is not
• Structure under ambiguity. The whole decomposition round exists to see whether you can impose order on an open problem without a template
• Ownership with numbers, and reflection on failure. Achievements are probed for what you personally decided and what you would do differently
• Low ego. Interviewers push back during the rounds, and how you take the pushback is part of what is being observed

Behavioural content is embedded inside the technical rounds rather than given its own stage, so these questions arrive with a problem still on the screen. The decomposition prompts below are the ones candidates report by name.

Levels.fyi for software engineers at Palantir in the United States, read on 9 September 2026. The overall median is $223K and reported packages run from about $185K to over $601K. The one level Levels.fyi breaks out, Software Engineer, has a median of $353K made up of roughly $193K base, $156K a year in stock and a small bonus, and Levels.fyi describes it as the entry level with two to three years of experience typical. The gap between that figure and the overall median means the sample is uneven, so read the range rather than the point.

1. Rehearse decomposition out loud, because silence is the reported way to fail it. Take a large problem, set a timer for an hour, and narrate: who uses this, what decision changes for them, what data you would need, what you would ship first, and how you would know it worked.
2. Do not open with a framework. Interviewers report rejecting candidates who start with a consulting structure, and the round is testing whether you can build a structure for this problem rather than fit it to one you already had.
3. Have a real answer to why Palantir that names a product. The question is pushed two or three layers deep by the hiring manager, and Palantir says shallow motivation is a top reason it turns down strong engineers.
4. Decide what you think about defence work before you are asked. A considered position is acceptable either way, and an unprepared one is the answer that costs the offer.
5. Practise reading rather than writing. Open unfamiliar code, explain what it does out loud, then plant a logic bug in a file and find it cold. Those are two of the rounds.
6. Get SQL joins and aggregation fluent. They appear in the 90-minute screen and again whenever a design answer has to say where the numbers come from.

This guide covers Palantir's engineering and research hiring. For management and leadership roles the loop is similar but the bar shifts to people, delivery and strategy, so pair it with the leadership interview prep hub. The bar for your exact role comes from the role-by-role guides, and the prep that actually transfers is spoken, so run a mock interview before the real one.

Also interviewing at Anduril, Wayve or Helsing? Their guides follow the same format, from the first screen to the offer.

• 01Ophy, Palantir interview process 2026the stage-by-stage loop and timeline, the 90-minute HackerRank in three parts, the decomposition round's two phases and grading criteria, the FDSE and product development split, and the note that Palantir does not publish its decision mechanism; the four candidate-reported decomposition prompts (traffic in New York, syncing two employee record systems, a logistics client losing money on deliveries, cooking help for elderly people with poor vision) and the two phases
• 02Intervyo, Palantir Meritocracy Fellowship hiring processthe fellowship route, and that it runs without psychometric tests or an assessment centre, assessing technical aptitude, agency and maturity.
• 03Intervyo, Palantir application guidethe emphasis on what a candidate has built rather than credentials.
• 04AllyNerds, Palantir interview process 2026corroborating account of the four to six stage loop and the absence of any pre-recorded video stage.
• 05ResumeAdapter, Palantir interview process and questionscandidate-reported detail on the online assessment and the onsite rounds.
• 06Levels.fyi, Palantir Software Engineer, United Statesthe overall median, the reported range, and the Software Engineer band with its base and stock split. Read 9 September 2026.

Interview processes change. This reflects widely-reported and sourced conditions as of 2026 — confirm specifics with your recruiter, and treat it as a map rather than a guarantee.