HexQuarter

Bitcoin-native engineering for payments, identity, and user-owned applications.

https://hexquarter.com

We help product teams build independent infrastructure for payments, identity, and data.

We design and ship systems that replace or reduce these dependencies using open, user-owned infrastructure:

* Bitcoin & Lightning payment systems (non-custodial)

* Nostr-based identity and data layers

* Custom backend architectures for sovereign applications

* Integration of open protocols into existing products