A recruiter from Sonar contacted me via LinkedIn. I went through 5 rounds of interviews in 4-5 weeks. 1st round (Initial Interview): a recruiter and a developer interviewed me on Zoom. It was about my career milestones, motivations, and Sonar's company culture. There were a few questions related to computer science and programming. 2nd round (Technical Video Interview): I was interviewed on Zoom by a C# developer from the team I was applying to. He first asked me about basic concepts of the C# language and the .NET runtime. Then we solved a simple coding exercise together. We used Google Docs as a code editor rather than an IDE. 3rd round (Onsite Technical Interview): this took place in the company's office. A flight and a room at the airport hotel were booked for me. So I flew to Geneva, and on the next day, I went to Sonar's headquarters for the next two rounds. The technical interview lasted about 3 hours and was conducted by two developers. I was given a task I had to complete in 3 sprints using my own laptop and development tools. My interviewers checked the code I wrote each time. This task included unit testing, as well as drawing on a whiteboard. It was easily the most fun part of the interviewing process. It felt like going to a nice coffee shop/pub and solving an interesting puzzle with some friends. The interviewers were very helpful. Once we were done, I was invited for lunch with two other engineers from different teams at a pizza restaurant. 4th round (People and Culture Team): this was done on the same day in the Geneva office as the previous round. It was the part I dreaded the most, but the interviewer was friendly and helpful. She read a list of prepared questions about attitudes, behaviors, and my past experiences during my career. It took about 1.5 hours. 5th round (CEO interview): this was an online interview I had with the company's CEO on Zoom. It lasted 30 minutes. It was mostly about salary expectations and when I could start if I received an offer. And there was more than enough time for me to ask my questions as well. It was also a very friendly conversation.

I applied on LinkedIn. I had 30 minutes call with HR and then 1 hour technical interview. The interviewer asked me average c# questions, I listed them below. Then he gave me small coding task. I think I answered those questions correctly and solved the coding task. But few hours later I got a negative feedback, they said my english isn't good enough. Fortunately, I didn't expect anything from this interview because I have read the glassdoor reviews, so it did not hurt my self-confidence:)

Before the first HR interview, you need to pass a coding test. After HR is first technical interview with another coding and technical questions, and 3-hours design interview with writing small program and test on modules of this program. Readability, maintainability, testability and code quality (since that is Sonar) are checked. And interview with team after 2 technical interviews. All interviews are conducted by developers. Atmosphere is friendly and supportive.