I've used lambda in two medium sized projects. One was a full webapp with the API Gateway/Lambda/Dyanmo serverless stack, which worked very well (with a few cav

I've used lambda in two medium sized projects. One was a full webapp with the API Gateway/Lambda/Dyanmo serverless stack, which worked very well (with a few caveats; local testing is hard, but it's totally feasible to spin up a whole new environment for each PR and run tests in it). The other was a sort of distributed workflow engine. One EC2 instance housed long-running processes (think JDBC connections that needed to stay open) and the rest of the infrastructure handled a load of async events, piping data around through SNS channels. Pretty easy and very slick once you get the hang of it. Definitely needs better tooling, though I think that'll come along in time.