Security
Ahmed Abdelmageed3 min read
One backend, many coffee shops: multi-tenancy with Express and PostgreSQL
How My Coffee keeps every shop's menu, staff and orders apart in one API and one database: a shop on every row, a tenant read from the database and not the token, and tests that try to cross the line.
- Backend
- PostgreSQL
- Security
Ahmed Abdelmageed2 min read
Signing crypto orders on a phone without confusing errors
How Megora signs Binance orders on the device, fixes clock drift, and rejects bad orders before the exchange does.
- React Native
- Security
- APIs
