It sounds from the outside like Oxide has an interview process that requires some low level engineering work to be delivered? Maybe I got that wrong.
As usual, I'm assuming the assignment is evaluated based on a reasonable time-commitment. From what the recruiting experts tell me, it's a good strategy to spend as much time as possible, the deliverable is better, and the optics aren't bad either, it signals investment into the application instead of signalling spray and pray application broadcasting.