Serverless and Spring Cloud Function

We have been discussing going to a more serverless architecture at work and so I decided that I should do some research to see where that stuff is now. When I was at Choose we used AWS Lambda to implement the backend of an abandoned shopping cart service. We would then use that data to drive an email campaign to encourage the users to come back and finish purchasing an energy plan. It had a huge effect in driving conversion rates and we were able to implement the service in about 25 lines of vanilla java code. I opted not to use Spring as I judged the startup times to be too slow for it to be worth it. To manage libraries we used the maven shade plugin in our build process to build a fat jar.