The process starts with a 30 minutes intro call with their recruiter. The talk is quite informative. Topics discussed are your experience and fit, company details, interview process, salary expectations etc.
Unfortunately, the company requires employees to do one week long (24/7) on-call shifts every ~4-6 weeks.
Their salary budget can be considered good for the local market, but is not exceptional. On-call shifts are payed, but it still may not worth is from a work-life balance point of view.
The next step is quite interesting take home exercise, available on their GitHub. At this point I already decided not to continue, but I still did the exercise for fun to refresh my pretty limited Golang knowledge.
My submission was evaluated in about 4 days, with the feedback being negative but well explained. What they missed were some more advanced error handling related features, I decided not implemented because of lack of time. It may worth noting that I mentioned these features in the readme as possible improvements.