Codesignal. 4 questions, 90 minutes. Not too bad. I was told that it would be a time crunch. Email said that the cleanliness of the code didn't matter and the only thing that matters is completion and correctness and also speed.
Recruiter reached out, they emailed my references from the start. Only after my references checked out, they sent me an OA which I felt was fairly difficult, I got 3/4 questions and then they rejected me.
Questions d'entretien [1]
Question 1
An OA with an industry style problem that gets progressively harder each time
J'ai passé un entretien chez Anthropic (Londres, Angleterre)
Entretien
Coding screen in 4 parts. First 2 parts were easy enough. Progressively more difficult and you can't advance to next stage until all test cases pass. Unfortunately didn't make it to the final stage due to a single test case. Score was higher than they said was required but I didn't progress.
Questions d'entretien [1]
Question 1
They asked for references, didn't get to interview stage.
J'ai passé un entretien chez Anthropic (Londres, Angleterre) en sept. 2025
Entretien
Got an OA to do after a month. The OA was a code signal industrial coding framework. Did not pass the OA. The next steps in the email said.
Based on a holistic assessment of your application, CodeSignal, and written references, we will advance candidates on a rolling basis through three additional rounds. These are:
A 55-minute coding challenge over Google Meet using only core Python functionality (no ML or libraries needed)
A 55-minute coding challenge over Google Meet on prompting and engineering with LLMs in Colab
A 15-minute research brainstorming round with an Anthropic researcher over Google Meet
Questions d'entretien [1]
Question 1
Codsignal OA sent after a month of application. It had a weird format of 4-levels it was level by level coding for classes and oops in python. Given from a non-cs background I found it challenging. The email had a google form to be sent to your profs for recommendation letters. They won't contact for you.