I applied through a recruiter to London.

First, there was a phone interview. The next step was a four-day-long test.

I had to implement a game similar to Candy Crush in C++ using SDL. I wrote the code in Xcode. I assumed that since they use C++ only for mobile, it naturally meant they used Mac or Linux for development. Because of this, I freely used C++11 features.

I was wrong. After a week, they asked me to compile the code for them for Windows.

It took me another half a day (most of it was spent installing and upgrading the OS). I removed some C++11 features to make it compilable on Visual Studio too.

Next, I had an interview in the London office. After that, things went very slowly. I had 4-5 additional interviews in the following 2 months. I always received good feedback, but no offer. They bounced my application from one team to another.

My last interview was more than 3 weeks ago. Since then, there has been no reply from them. They don't even respond to the recruiter.

The whole thing indicates a deeply flawed hiring process to me.

Product people asked only product questions. They seem to be in charge. They don't care about your engineering skills or interests.