I had an initial discussion with the internal recruiter on LinkedIn, this then led to a phone call interview discussing general questions about my suitability for the role. Following on from this, the main bulk of the interview consisted of the following stages: 1) Technical Interview with an Engineering Lead: this is based on technical questions around system design concepts and my experience with architecture. 2) Design Interview: I was presented with a system to design and questions surrounding my design were asked. Here what's been looked at is reliability, performance, security etc.. 3) Take home code test which is payment system related API. There are no specific technical requirements here. You are given flexibility to see how you would go about it (if you want to do it properly, this does take up a lot of time). 4) Final technical interview: lots of questions around C#, .NET, Design Patterns