I was a back-end Software Engineer at uMed in 2018.
I worked in Python on Django and Django REST Framework, with PostgreSQL behind it and Celery and Redis handling work that shouldn’t happen inside a request.
That ran on AWS, deployed with Ansible and Docker, and I also worked on some Lambda functions.
Django and Django REST Framework are still a sensible choice for a back end that is mostly a well-modelled database with an API over it, which is what a lot of products need first.
Most of my work now is Python on AWS rather than Django, but if that’s the shape of what you’re building, contact me.