I applied online. I interviewed at ClickHouse in Dec 2025
Interview
I received a call from a HR Recruiter, had a half hour phone call with them, then a technical pair programing test with an engineer, then was asked to do a take-home coding test over the next five days, which would be reviewed in a session with an engineering manager. I spent 16+ hours on the coding test, and submitted it after three days. A few days after submitting my code, I was informed that they were going with other candidates, without any feedback, or review of my take-home coding test, despite a request for any notes.
Interview questions [1]
Question 1
Take-home coding test - Design and implement a notification system in typescript/react.
I interviewed at ClickHouse (Amsterdam) in Oct 2025
Interview
I applied for a Full Stack Developer position at ClickHouse. The process started with an initial conversation with the recruiter, followed by a live coding interview. After that, I was given a take-home assignment, which I worked on for five full days.
Next, I had an assignment review with the team lead and one of the team members. After that, there were two additional interviews — one with the engineering manager and another with a VP. I eventually received and accepted an offer from ClickHouse.
The plan was for me to relocate to Amsterdam, and ClickHouse had agreed to sponsor my visa. However, shortly after, I received a call informing me that they had to withdraw the offer because I am Iranian.
Overall, I truly enjoyed the interview process — everyone I met was professional and friendly. But I still find it deeply disappointing and unfair that an offer could be rescinded solely based on the country I was born in.
Interview questions [1]
Question 1
I was asked to implement a simple ecommerce platform as a take-home assignment.
