Apart from the HR interview, they have six additional interviews to evaluate you, which take more than six hours. This is a ridiculous amount of interviews for the Polish market; it's not usually seen even at Google and similar companies. I have always had shorter, better-designed processes in my long career.

The positives:

• They provide at least some feedback in the end.
• The technical project retrospective interview was the only down-to-earth interview, with questions and discussions relevant to the job.

Now for all the negatives:

• The number of interviews was very redundant due to similarities between them and could have easily been cut in half at least.
• The messaging around the length of the process is rather manipulative. They congratulate you with going to the last stage of the process, only for it to turn out that the last stage is five interviews!
• The content of the interviews was mostly far from Android development or mobile in general. Most of the time, I didn't encounter active mobile devs. I doubt they are good at evaluating the actual skills used on the job. The tasks were rather artificial and irrelevant to the job.
• Something is off with their culture. It has cultish vibes even during the interviews. The Culture Interview is especially reflective of this. It's really weird and out of touch compared to your typical soft skills interview.
• While there was some feedback, it looks a bit strange. Pros and cons are presented with equal weight. However, the cons are mostly rather small, nitpicky things that can be easily learned, things they didn't ask about very deeply, and things unrelated to mobile applications at all. Considering the very small amount of time for Android skills evaluation, the selection of interviewers, and a huge amount of irrelevant tasks, this is not surprising.
• There might be something sketchy going on with the job position in general. It has been on LinkedIn for a long time and keeps being updated there for months. I doubt they can't find a dev on a market full of qualified people for such a long time.
• They claim to be diverse. Not only did I not see much diversity among the interviewers, but long, tedious interview processes with poorly designed, irrelevant tasks are known to facilitate discrimination of all kinds.

I went through their process to strengthen my interviewing skills, but it was a tedious mistake. It's not good for very experienced devs because there are better options with shorter interviews, at least in Poland.

It's a waste of time for not-very-experienced devs as well because other companies have more practical interview stages and are less nitpicky.

They are under NDA.

It's not even worth talking about since it makes more sense to look at companies with better processes, see what they ask, and avoid wasting time.