Web bits: Python 3 and Django with Celery running on Heroku. Postgres (source of truth) and Redis (caching and queues). S3 for storage. Front end is HTML and ba

Web bits: Python 3 and Django with Celery running on Heroku. Postgres (source of truth) and Redis (caching and queues). S3 for storage. Front end is HTML and basic JavaScript. Pretty happy with it, it's really quick to make new stuff in. Starting to consider adding types to some bits Python with mypy as it's got to a size where types would be useful. App: React Native with Redux. Flow for types (would use TypeScript if starting again today). RN is a pain but seems better than the alternatives for what I need. That all allowed me to get a prototype together at the start and to iterate very quickly which was essential for making the whole thing happen at all. Some of that was the technology itself but a lot of it was just that I was very familiar with it.