PostgreSQL
PostgreSQL is our default system of record — a relational database rigorous enough for money, flexible enough for everything else.
PostgreSQL is a mature, open-source relational database with strong guarantees around transactions and data integrity. It also speaks JSON, full-text search, and geospatial data when you need to step outside strict tables.
When state has to be correct — balances, ledgers, audit trails — we want ACID transactions and constraints the database enforces, not the app. Postgres gives us that without locking us into a vendor.
In the product,
not the slide.
Financial systems of record
Ledgers and balances where a constraint at the database is worth more than a check in the code.
Multi-tenant SaaS
Row-level security and schemas that isolate customers cleanly as the product scales.
Search & relationships
Full-text search and complex joins without bolting on a second datastore too early.