I have just recently got through a migration from express to a lambda based stack. In the end, performance is pretty good (once the lambdas are warm), but there

I have just recently got through a migration from express to a lambda based stack. In the end, performance is pretty good (once the lambdas are warm), but there were a few tricky parts, but nothing impossible. Serving backend requests is easy with Lambda, but the code for managing the backend can get quite large, quickly. If you are loading up data and it's going to take more than 5 minutes to perform a task, you need to build a queueing system from AWS primitives.