Better Auth can be used as a pure Auth-Service and thus integrated in backend frameworks of any other programming language. E. g. a Gin-backend written in Go could consume JWT tokens from the Better Auth backend.

A great video on this approach: https://youtu.be/dNY4FKXwTsM?si=RBKCwEQuConKuSW5
https://github.com/dreamsofcode-io/authly