What Is the Anduril Interview Process Like? (Round by Round)

Anduril's software engineering interview typically runs six sessions across three stages: a recruiter phone screen, a technical phone screen, and a final round of four back-to-back sessions (two coding rounds, an object-oriented or system design round, and a behavioral conversation with a senior staff member). The process moves fast: three to four weeks from first contact to offer is common, and candidates report next-day feedback between rounds.

Two things distinguish the loop beyond speed. First, mission alignment is evaluated everywhere, not in one round: recruiters and interviewers across the process gauge your genuine motivation for working in the defense sector, and ambivalence filters candidates out. Second, the technical prompts are deliberately ambiguous: multi-phase problems where extracting requirements is part of the evaluation, mirroring a company that ships novel hardware-software systems into unclear operational environments.

One practical gate before anything else: most Anduril roles require US person status under export control regulations (ITAR), and many require eligibility for a security clearance. Confirm your situation before investing in the process.

Quick Overview

Stage 1: Recruiter Screen

Longer and more substantive than most recruiter calls: 30 to 60 minutes covering your technical background and, centrally, why you want to work in defense. This is a real screen, not logistics; recruiters filter for mission motivation at the top of the funnel. Have your answer genuinely ready (structure and a sample in How to answer "Why do you want to work at Anduril?"), and use the call to learn your target team's products; Anduril spans drones, towers, underwater vehicles, and the Lattice platform, and loops differ accordingly.

Stage 2: Technical Phone Screen

A 60-minute live coding session, typically in a HackerRank-style environment. The Anduril signature: the prompt is often deliberately underspecified, and clarifying requirements is explicitly part of what is graded. Ask about input sizes, edge semantics, and what phase two might look like before committing to a design; candidates who charge into code against imagined requirements fail a test they did not know was running.

Topic-wise, graphs are the most commonly reported area across Anduril's coding rounds: BFS and DFS, cycle detection in directed graphs, Union-Find for connectivity, and variants of classics like Number of Islands. That distribution makes sense for a company whose products reason about networks of sensors and assets; prepare accordingly.

Stage 3: The Final Round

Four sessions, usually virtual and back to back:

1. Two coding rounds, continuing the multi-phase, requirements-unfold-as-you-go format. Expect to build something, then extend it as constraints arrive: the same graph-heavy distribution, plus practical state-machine and data-processing problems. Working code at each phase beats a grand design that never runs.
2. Object-oriented or system design, depending on level and team: modeling a system cleanly (OOD for earlier-career candidates) or designing real-time distributed infrastructure with failure tolerance (senior candidates). Details and reported themes in What to expect in the Anduril system design interview.
3. Behavioral with a senior staff member, roughly 45 minutes: "Why Anduril?", mission-alignment probes, product-opinion questions (including the reported "what is your least favorite Anduril product?"), and culture fit for a fast, ambiguous, hardware-adjacent environment. Full preparation in Top Anduril behavioral interview questions.

Timeline and Decision

Three to four weeks end to end is typical, with unusually fast feedback between stages. Offers can move quickly too; like other fast-cycle companies, sequence Anduril appropriately among your other processes. Clearance-requiring roles add government timelines after the offer, not during the interview.

How to Prepare

• Graphs until they are reflexive: the reported question distribution is unusually concentrated. Grokking the Coding Interview covers the graph patterns (traversals, Union-Find, topological ordering) that dominate; drill them to fast, clean implementations.
• Practice ambiguity deliberately: take underspecified prompts and rehearse the first five minutes: what you ask, what you write down, and how you commit to scope. At Anduril this is a graded skill, not a preamble.
• System design for hostile conditions: Grokking the System Design Interview for the method, then practice the Anduril flavor: real-time pipelines, edge computing with intermittent connectivity, and failure modes as first-class requirements. Grokking System Design Fundamentals shores up the building blocks.
• Know the products. An hour reading about Lattice, Ghost, Sentry, Anvil, and Roadrunner pays off in at least three of the six sessions, and having a genuine opinion about the portfolio is close to required.