payments

2 posts tagged payments.

2026-03-024 min read

Three PostgreSQL Queries That Quietly Slow Down Payments APIs

A composite index in the wrong column order, a full scan that runs every minute, and a leading-wildcard search that cannot use an index at all. How to find each one with EXPLAIN ANALYZE, and what to do about it.

postgresql
performance
payments

2026-02-148 min read

Why I Migrated Sendryx's Payments Backend from NestJS to Rust

Migrating the Sendryx payments backend from NestJS to Rust: 250 MB to 20 MB resident memory, the hosting cost that saved, transfers from roughly 850 ms to 300 ms, type safety at the money boundary, and compile-time checked SQL.

rust
payments
architecture

Posts

Three PostgreSQL Queries That Quietly Slow Down Payments APIs

Why I Migrated Sendryx's Payments Backend from NestJS to Rust