Initial stage was a telephone interview with a recruiter. This was relaxed and basically an informal chat.
I was then invited to conduct a video call with the tech lead. Again this was quite informal and relaxed. I was asked about my experience and what I knew about the company. I was also given the opportunity to ask questions about the role/company.
The final stage was a face to face interview with the tech lead and the CTO. I was made to feel really welcome and again it was a relaxed environment. I answered some competency based questions which were provided before the interview. I then met some of the team and they are looking at how you interact with them and whether personally you are a fit for the organisation. Finally, there was a pairing exercise with one of the developers.
All in all a nice process, which was completed quickly. As someone who hasn't attended many tech interviews, it was a nice experience.