Tangelo Games Backend Developer interview questions

First I've got a call from HR. After I've got an refactoring exercise. The exercise is a client-server program. SOLID, TDD and maintainability are the parameters the company values. I've got a quick reply from the company, I Appreciate that speed a lot. After I was invited to the office, for the last interview. Very nice office and very nice people. The company has a lot of perks, flexible working hours, remote work, fresh fruits, ping-pong, budget for trainings, top notch computers. I had to decline the offer as I got another offer from another company.