Most internet services are also financial services. From recurring subscription payments, investment banking, issuing transfers and payouts to bank accounts, consumer retail, forex exchanges, bitcoin, payroll services; take your pick, there is plenty of opportunity to work with finance in tech.

Building these services properly and securely should not be a challenge. No one should end up with something like $100.000000000000000034 showing up on their bank statement.

In this post, I’m going to show you how to build a minimal financial service with the use of python, Babel.numbers, FastAPI, and Rates API.