The Anthropic Forward Deployed Engineer interview loop, round by round
The customer conversation is where most technically strong candidates stop.
The Applied AI Engineer loop: recruiter screen, technical phone screen, a take-home or live coding, a simulated customer conversation, then system design. The simulation is reported as the highest-signal round by some distance.
Who you meet
- Recruiter
- Engineers
- A customer-facing lead
The rounds
1. Coding
What it grades
- One problem in four progressively harder stages
- First-principles thinking
- Safe, robust code over speed
Each stage unlocks by passing the previous stage's unit tests. Other candidates report a pair-programming deep dive instead, so expect either.
2. Customer conversation gating
What it grades
- Discovery before persuasion
- Layered questions about their actual environment
- Handling open skepticism without getting defensive
The reported scenario: "I am not sure Claude does anything ChatGPT cannot already do. Convince me." Around 60% of candidates who cleared the coding round are reported to come unstuck here, which makes it the round worth the most preparation.
3. System design
What it grades
- Inference batching on a single GPU, up to 100 inputs per batch, users waiting synchronously
- End-to-end batching for LLM queries
4. Values
What it grades
- Applying stated values to unrehearsed situations
- Whether you can articulate the Anthropic and OpenAI distinction
Candidate guidance is consistent and slightly counter-intuitive: be genuinely skeptical rather than a fan, and do not over-structure the answers.
Questions reported from this loop
- Write a rate limiter supporting per-user and global limits. Expect distributed-coordination follow-ups.
- Design a distributed job queue with priorities, retries and dead-letter handling.
- Process streaming data.
- The interviewer plays a CTO: "I am not convinced Claude does anything ChatGPT cannot." Convince me.
- Design inference batching for a single GPU, up to 100 inputs per batch, with users waiting synchronously.
- Apply Anthropic's values to an unrehearsed situation. Balancing product velocity, reliability and safety comes up.
What is not on this page: the practice mapped to each round, and the list of what is not worth preparing for this loop. Both are in Rung.
Open this loop in Rung