Anthropic interview guide
Anthropic software engineer interview: process, questions and prep
Anthropic tests two things hard: practical coding and its values. Candidates say the values round is the one most people fail, because rehearsed answers do not hold up. Here is what candidates commonly report and how to prepare.
The process
The Anthropic interview process
What candidates commonly report. Teams and levels differ, so ask your recruiter what your loop looks like.
- Recruiter call
About 30 minutes on your background and why you want to work at Anthropic.
- Online coding test
A timed test, reported at about 90 minutes. You build one small system in levels, like an in-memory database, and each level adds new rules.
- Hiring manager call
About an hour on your past work and how you would fit the team.
- Interview loop
Usually four or five interviews of about an hour each: practical coding, system design and the values round.
Questions
Anthropic behavioral interview questions
Questions candidates report from Anthropic behavioral rounds, and what a strong answer shows.
Why Anthropic? And is there anything about its mission you'd push back on?
A strong answer shows a specific reason tied to Anthropic's products, mission or way of working.
Tell me about a time you were asked to build or do something that went against your values.
A strong answer shows noticing the conflict honestly.
Tell me about a time you were confident in a solution that turned out to be wrong.
A strong answer shows admitting the mistake plainly.
Tell me about a time you raised a concern that was unpopular.
A strong answer shows speaking up despite pressure.
Tell me about tough feedback you received, and tough feedback you gave.
A strong answer shows taking feedback without ego.
Tell me about a time your team disagreed with your idea. What did you do?
A strong answer shows listening and taking their view seriously.
Tell me about a bold, difficult decision you made.
A strong answer shows a decision with real risk.
Tell me about a problem that wasn't clearly defined. How did you make progress?
A strong answer shows defining the problem first.
Questions
Anthropic coding interview questions
Coding problems candidates report from Anthropic interviews.
Web Crawler
Breadth-first crawl, one host
Stack Samples to Trace Events
Diffing call stacks, sample by sample
Banking System
Simulating accounts from a query log
LRU Cache for Any Arguments
Hashable cache keys from args and kwargs
Find Duplicate Files
Parse, then group by content
In-Memory Database
Filters, sorting and deletes on rows
Bank Accounts with Merge History
Preserve historical ownership across merges
Key-Value Store with TTL and Quotas
Free expired capacity before enforcing per-tenant quotas
How to prepare
How to prepare for Anthropic
- Practice the coding test format: build something small, then extend it three or four times without breaking what works.
- Write code you can change fast. Later levels reuse what you wrote first.
- For the values round, pick real moments when you were wrong, raised a hard concern or changed your mind.
- Read what Anthropic has published about AI safety and form your own view, including your doubts.
Questions.
What is the Anthropic values interview?
It is Anthropic’s behavioral round. It asks about honesty, hard feedback, times you were wrong and how you think about AI safety. Interviewers ask three or four follow-ups on each answer, so real stories work better than polished ones.
What is on the Anthropic coding test?
Candidates report a timed online test where you build one small system in levels, like an in-memory database with set, get and delete, then filters and expiry times. Speed and working code matter most.
How long does the Anthropic interview process take?
Reports range from about four weeks to three months, depending on the team and the level.
Can I practice a Anthropic mock interview?
Yes. Orin runs Anthropic-style mock interviews by voice, with Anthropic’s reported questions asked first and follow-ups in its style. Company interviews are on the Pro and Max plans. Your first interview is free.
How does an Orin mock interview work?
You talk with Orin by voice, like a video call. It asks questions, listens and asks follow-ups based on what you said. Coding happens in a live editor and design on a live whiteboard. After the interview you get a report with quotes from your answers, what cost you points and what to practice next.
Practice your Anthropic interview.
Talk through Anthropic-style questions with follow-ups, then see exactly what to fix. First interview free.
Start free interview