[nemetroid]

1. code that listens to a REST API and puts a request on a task queue

2. code that listens to the task queue for new jobs

3. code that fetches a file from the FTP server

4. code that converts the JSON file to a format appropriate for the root finding

5. code that performs the root finding

6. code that converts the result of (3) to a format appropriate for insertion into a table

7. code that inserts the result into a Postgres table

Steps 4, 5 and 6 seem easy enough to implement in a pure fashion.

[Izkata]

Yeah, just reading their description I was like "the middle part seems easily done as its own thing".

"Functional Core, Imperative Shell" was just posted too, this is the perfect example of where that structure works: https://news.ycombinator.com/item?id=34860164