Everything was fine until the end of the interviews. It's been two months since the interview, and they still haven't paid the promised visa fee, which is about 100 euros. Before the interviews, they answered every email I sent. However, after the interviews, I didn't receive a proper answer regarding that issue.

Other than this, the interview process was very smooth.

They found me on LinkedIn. We had a Skype interview, then an online test, followed by another Skype interview with two developers. Afterward, they hosted me in Amsterdam for the final interview, which comprised four parts. A week later, I was informed that I would not receive an offer and was given constructive feedback from HR.

They asked algorithm questions to check my problem-solving skills and data structure knowledge. One question was about a fill color function. Basically, they asked how I would fill a given grid with the color of a selected pixel. Then, they asked about my favorite data structure and whether I knew how it is implemented.

Another question was about system design. They asked how I would plot a graph of requests per second/minute, etc., of a server.