Top Anduril Behavioral Interview Questions (and How to Answer Them)

Question

Design Gurus · Accepted Answer

Anduril's behavioral evaluation has one trait no other company in this series shares: the central question is whether you genuinely want to build defense technology, and the company screens for it explicitly, in multiple rounds, with follow-ups designed to find ambivalence. The dedicated behavioral session (roughly 45 minutes, often with a senior staff member or engineering manager) combines that mission probe with culture questions calibrated for Anduril's operating reality: consumer-tech pace applied to weapons systems, small teams shipping hardware and software together, and constant ambiguity.

The preparation is therefore twofold: resolve your own position on the mission honestly, and prepare evidence-based stories for a culture that prizes speed, ownership, and directness.

What Anduril Screens For

Mission conviction, not mission tolerance. Interviewers distinguish candidates who are drawn to the work from candidates willing to overlook it. The former get offers. Expect direct questions about how you feel working on weapons, and expect hedges to be noticed.
Informed engagement with the products. The reported question "what is your least favorite Anduril product?" is a brilliant filter: it simultaneously tests product knowledge, honesty, and whether your interest survives contact with specifics. Generic answers fail it twice.
Operating in ambiguity. The technical rounds test it mechanically; the behavioral round tests it narratively. They want stories of making progress when requirements were unclear, priorities shifted, or the problem had never been solved before.
Speed with ownership. Anduril's self-image is the fast alternative to legacy defense primes. Stories about shipping quickly, owning outcomes end to end, and cutting through process fit the register.
Collaboration across disciplines. Software at Anduril ships inside hardware. Evidence you work well with electrical, mechanical, and operations people, and respect their constraints, matters more than at pure-software companies.

The Questions to Prepare For

Mission and motivation

Why Anduril? (The load-bearing question; full guidance in How to answer "Why do you want to work at Anduril?")
How do you feel about working on weapons systems? Have you thought about where your line is?
What is your least favorite Anduril product, and why?
Which of our products would you most want to work on, and what would you improve?
What do you think Anduril gets right that legacy defense companies get wrong?

Ambiguity and pace

Tell me about a time you made progress on a problem with no clear requirements.
Describe the fastest you have shipped something real. What made it possible?
Tell me about a time priorities changed underneath you mid-project.
Describe a decision you made with incomplete information under time pressure.

Ownership and hard conditions

Tell me about a time you owned a failure in the field or in production.
Describe debugging something where the system was hard to observe (remote, embedded, or physical).
Tell me about a project where the deadline was truly immovable.

Cross-discipline collaboration

Tell me about working closely with hardware engineers or another discipline with different constraints.
Describe a conflict between what software wanted and what the physical system allowed.

How to Answer

Answer the mission questions like an adult. State your position plainly, give your genuine reasoning, and acknowledge the weight of the work. Interviewers report respecting candidates who have clearly thought about where their ethical lines sit, even when the thinking is nuanced. What fails is visible avoidance.
Prepare the least-favorite-product answer for real. Pick an actual product, name a real limitation or strategic question (unit cost, counter-countermeasures, market fit), and keep the critique respectful and technically grounded. This answer, done well, is often the most memorable five minutes of the round.
Tell ambiguity stories with your reasoning visible. The shape that works: what was unclear, what you decided to assume, how you bounded the risk of assuming wrong, and when you revisited. That is the daily mechanic of the job.
Bring field-reality energy to failure stories. Anduril's systems fail in deserts and oceans, not just in dashboards. Stories where you owned a failure under physical or operational constraints, and hardened the system afterward, fit perfectly.
Keep numbers attached. Speed claims especially: "concept to field test in nine weeks" is an Anduril-native sentence; "we moved fast" is not.

Sample Answer Sketch: "How do you feel about working on weapons systems?"

"I have thought about it seriously, because I did not want to discover my own position mid-career. Where I have landed: I believe deterrence works, and I believe the side with better technology gets to set terms without firing it, so building the best version of these systems is, to me, work that reduces violence in expectation rather than adds to it. I also hold that with some humility; autonomy in weapons raises real questions, and I would rather be one of the people inside taking them seriously than one of the people outside assuming nobody does. Practically, my line is that I want meaningful human accountability in lethal decisions, and everything public about how Lattice keeps operators in command sits comfortably inside that line. If that ever changed, I would say so, which I suspect is exactly the kind of engineer you want on this."

Direct, personally reasoned, informed about the product's actual design philosophy, and honest about limits: conviction without bravado.

How to Prepare

Resolve the mission question privately first; every other preparation builds on it.
Study the product portfolio for two hours and form real opinions, including one respectful critique.
Prepare five stories with numbers: extreme ambiguity, fastest ship, owned failure, immovable deadline, and cross-discipline conflict.
For a structured method to build evidence-dense stories, use Grokking Modern Behavioral Interview, and see the full loop in What is the Anduril interview process like?