LunarLabsThe part underneath
APIs, databases, logins and hosting. Usually bought alongside a site or an app, sometimes on its own when what you have already works but cannot take the load.
what it is built with
- Kotlin and Ktor
Typed end to end, with coroutines instead of a thread per request.
- PostgreSQL
The boring choice, on purpose. Constraints in the database, not in hope.
- Redis
Caching, queues and pub/sub for anything that has to be instant.
- Entra ID and Discord SSO
People sign in with an account they already have.
what you get
- 01
Events that fan out
Redis pub/sub, so a new ticket, an invoice or a status change reaches every service that has to act on it the moment it lands. The portal you would log into runs on this.
- 02
Who can see what
Roles and permissions checked on the server, on signed tokens that can be revoked. Not a hidden button on the client.
- 03
Deploys that do not take the site down
Containers, rolling updates and a health check that has to pass before traffic moves. Failed deploys roll back on their own.
Backend work is scoped per project rather than sold in bands. Describe what it has to handle and you get one number back.