Anthropic Software Engineer Interview Experience — Rejected After a Weak System Design Round

Anthropic·Software Engineer·Jul 2026
OnsiteTechnical ScreenRejectedmedium

Phone screen: a file.

Onsite:

  • Coding: image processing.
  • System design: prompt playground. This round was probably my weakest performance — I hadn't crammed on enough interview experiences beforehand, and I hadn't written much down in my own doc. On one or two questions I walked right into the interviewer's trap. Pay attention to some low-level details here — that's also something I hadn't taken very seriously before.
  • Culture: one question asked whether you've ever really been so off — something you insisted on that turned out to be wrong.
  • Project deep dive: the interviewer didn't push hard on details, just asked who decided on the business metric.

Thinking back on it, I think it was the system design round that I didn't nail.

A week after the break, I got the rejection.

Feels like this puts a period on my 2026 job search.

Update (2026-08-04 03:58 +08:00): HR hinted that next time they'd take a deeper look at the materials I'd sent before. GG HF.

Published

Curated and edited by PracHub

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Interview at a glance

Company
Anthropic
Role
Software Engineer
Rounds
Technical Screen → Onsite
Outcome
Rejected
Difficulty
medium
Interview date
Jul 2026
Questions from this interview
2 questions

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