After first call with the recruiter, the next call was a tech/behavioral screen for about an hour. The interviewer explained in detail about what candidate they were looking for and the kind of problem they were trying to solve. A few behavioral questions after that, about current job, reason for changing jobs, etc. For the technical questions, they were about open apis, aws tech, lambda cold start, array vs list. They also asked questions about financial market and equities, call options, put options. Overall the call was a really good experience, just not a perfect fit for what we both were looking for.