It was informal. Two men conducted the interview for approximately 30mins. After which they gave the impression that I basically landed the job and then I did no even get an offer. Very misleading.
Bahaviroal style questions where I tell them about different projects I've lead, how do I manage multiple projects at the same time, why Vaimo, and then they asked me if I had general questions about the company and culture.
After that, there is a case interview for round 2, and I believe a culture fit interview