Hosting a backend function callable from front end client

## In what area(s)?

## Describe the proposal

I have a long Python script which takes 20+ minutes to run. It generates a report after a user submits details in the client. This needs to take unique parameters each run, access third party APIs whilst running and be scalable but also have a limited number of maximum runs to ensure third party API rate limits aren't breached.

I have been playing around with AWS but unable to find something straightforward to meet these needs, although I'm sure does exist.