Building Something “Unsexy” in Public — Day 27

Hey folks ,
Happy new year to all !

So,For the last ~27 days I’ve been building something very unsexy in public (reddit,twitter etc)— the “plumbing layer” every SaaS app needs, but nobody actually wants to build:
auth, orgs/teams, RBAC, invites, audit logs, feature flags… all the stuff that quietly eats 2–3 months before you even touch your real product.
Instead of rebuilding this again for my next idea, I decided to make a solid, self-hosted, open-source foundation that SaaS founders can start with from day one. Nothing flashy — just reliable, boring infrastructure that works.
Right now it runs locally with Docker and already supports auth, orgs, roles, invites, logs, flags + an admin UI. Basically a working MVP base layer.
I’m from India building solo, learning as I go — and almost at Day 30 now .

Curious — how did you handle auth & permissions in your startup?
built your own?
used a provider?
regretted your first version later?

Happy to share more as I go — thanks for reading .