Wolt Software Engineer Interview Questions
& Process

Had a recruiter call first. Then interviewed with the tech team about my experience and their dev culture. After that, I had a test assignment, which was pretty well done, but I didn't get great feedback. Then a third interview focusing on the assignment, and finally a fourth interview to close things out. They mentioned on-call rotations really late, in the last interview, which was a bummer and kind of ruined it.

We had several rounds: first an HR call that went over time from 30 to 70 min. then a 90 min call with 2 engineers (staff and EM) to dive deep into past experiences. After that, a take-home assignment due in 7 days, requiring production-grade code with attention to packages, logging, resilience, and tests; it was tested against their suites and I was told passing all is rare. Then, a system design round (90 min) where 2 senior/staff engineers reviewed the take-home, asked unrelated tech questions, and gave a system design problem to prepare. Finally, a 60 min interview with a VP of Engineering or Director. The whole process was very professional, with good feedback and responsive HR. Overall a great experience.

The interview process was quite annoying and frustrating. The tech lead interview itself was pretty straightforward, using STAR-style questions. However, the technical 'home assignment' (Venue Opening Hours) was really complex, involving many annoying edge cases and string transformations, and it required code that was 'production ready'. I was told during the tech-lead interview that the assignment was expected to take about 20 hours of a candidate's time, which I found to be an unreasonable amount of effort. For someone unfamiliar with Kotlin/Ktor, this could easily take up to a week. I usually avoid interviews with such demanding tasks, and this experience reaffirmed that. On the positive side, the recruiters were responsive and followed up quickly.