We built the entirety of the Give to Lincoln day giving day website using AWS lambda and DynamoDB. This includes tracking nonprofit registration, handling donations, and an admin area for managing the giving day.
This is super cool! I've been wanting to make/find something like this for a while. It looks overall great, but I'm really put off by the visual programming language. Is there a textual alternative that I'm not seeing on the web-page?
A lot of the languages you mentioned have different enough memory allocation characteristics than JavaScript due to immutability and functional style that they would probably benefit from having a garbage collector tuned to their purposes in webassembly. There's a reason we don't have one common garbage collector for all the managed languages.
I do recognize that this is a side point, but I think it's worth mentioning.
https://www.givetolincoln.com/