The interview process stages were clearly defined in their handbook, and it stays true to what's described in the handbook.

After submitting my online application, I received an email from the hiring manager that contained some followup technical questions. The technical questions touched on optimization relating to Rails.

Then, a screening call was scheduled with the recruiter. It was a quick 30-minute call with very basic questions like: Why do you want to work at GitLab? Have you written tests before? Why are you leaving your job?

The third stage was a technical interview. I was given access to a merge request, and I had to review and comment on it. During the technical interview, the interviewer (not the hiring manager) was very pleasant to talk to. I felt that I was mainly assessed on my technical knowledge and how I normally would write code.

The next stage was a video interview with the hiring manager, which also included technical questions. The interview was pleasant.

At each stage of the process, it was made clear to me which stage I was at and what would happen next if I passed through to the next stage.

The feedback given was also detailed and personalized.

How do you detect performance issues, and how do you deal with them?