What Is the Anduril Interview Process Like? (Round by Round)
Anduril's software engineering loop is usually six sessions across three stages. Those are a recruiter phone screen, a technical phone screen, and a final round of four back to back sessions. Candidates report three to four weeks from first contact to offer, with feedback in a day or two between rounds.
Two things set this loop apart. Mission fit is checked in every round, not just one. And the technical questions are often left vague on purpose, because pulling out the requirements is part of the test.
One gate comes before all of it. Most Anduril roles require US person status under export rules, and many require eligibility for a security clearance. Check your own situation before you invest weeks in the process.
The Loop in One Table
| Stage | Format | What is checked |
|---|---|---|
| Recruiter screen | 30 to 60 minute call | Background and real interest in defense work |
| Technical phone screen | 60 minutes, live coding | Coding through a vague, multi-part question |
| Final: coding, two rounds | About 60 minutes each | Algorithms, graphs, extending working code |
| Final: design | About 60 minutes | Object design or real-time system design |
| Final: behavioral | About 45 minutes | Mission fit, ownership, working style |
Stage 1: The Recruiter Screen
This call is longer and heavier than most recruiter calls. Expect 30 to 60 minutes.
Half of it covers your background. The other half covers why you want to work in defense. Recruiters filter on that answer, so prepare it like a real interview question.
Use the call to learn your team's product line. Anduril builds drones, sensor towers, underwater vehicles, and the Lattice software platform. The loop changes with the team.
Stage 2: The Technical Phone Screen
One 60 minute live coding session, usually in a shared online editor.
The question is often underspecified on purpose. Asking good clarifying questions is graded, not tolerated. Ask about input size, edge cases, and what the next part might add.
Candidates who start coding against guessed requirements tend to fail here. They fail a test they did not know was running.
Graphs are the most reported topic across Anduril coding rounds. Practice breadth first search, depth first search, cycle detection, and union find. Island counting and connectivity variants come up often.
That focus fits the products. Anduril's systems reason about networks of sensors, vehicles, and assets.
Stage 3: The Final Round
Four sessions, usually virtual and back to back on one day.
Two coding rounds. Same style as the phone screen, in more parts. You build something, then extend it as new constraints arrive. Working code at each step beats a large design that never runs.
One design round. Earlier career candidates usually get object oriented design, such as modeling a system in classes. Senior candidates get distributed system design with real-time data and failure handling.
One behavioral round with a senior engineer. About 45 minutes. Expect "why Anduril", questions about your opinion on their products, and questions about working in a fast, unclear environment. Candidates report being asked which Anduril product they like least.
What Anduril Is Measuring
Speed of shipping matters more here than polish. Show that you can get something running, then improve it.
Comfort with unclear requirements is the second signal. Say your assumptions out loud, then check them.
Mission fit is the third. A neutral answer about defense work is treated as a weak answer. Be honest, because a forced answer is easy to spot.
How to Prepare
- Drill graphs above everything else. Traversal, cycles, and union find carry most of the coding rounds. Grokking the Coding Interview groups these by pattern.
- Practice questions that arrive in parts. Solve part one, then add a constraint and extend your own code. That is the exact format used here.
- Write your defense-sector answer first. It is asked in at least two rounds. Use how to answer why you want to work at Anduril.
- Prepare the design round for your level. See what to expect in the Anduril system design interview and Grokking the System Design Interview.
- Have a product opinion ready. Pick one Anduril product, name one thing you would change, and say why.
- Know the timeline. How long it takes to hear back after an Anduril interview sets the right expectation.
- Compare loops if you are interviewing widely. The Anthropic process and the Stripe process run on different signals.
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