Notes on idempotency keys in payment APIs
May 12, 2026A practical look at how we made retries safe without double-charging, and the edge cases that bit us along the way.
Why we moved our queue off Redis
April 28, 2026Redis served us well for two years. Here is what pushed us to a durable log and what we learned migrating live traffic.
A small CLI for tailing structured logs
April 3, 2026I kept grepping JSON logs by hand, so I built a tiny tool. Sharing the source and a few design decisions.
Understanding TCP backpressure with a toy server
March 15, 2026The clearest way I found to build intuition for flow control is to write a server that intentionally stalls.