Everything I have published, newest first. Mostly Rust services, PostgreSQL under real traffic, and the parts of running a payments platform that nobody writes a tutorial about.
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.
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.
Notes on implementing TCP/IP fundamentals in Rust over a Linux TUN device: the three-way handshake as a state machine, connection tracking by four-tuple, raw packet parsing, checksums, and what writing it changed about how I write application code.