Notes on things I'm building, learning, and figuring out — web development, infrastructure, email, and beyond.
Login load tests at 100 VUs timed out on Kubernetes. A single bcrypt.compare took 6 seconds. UV_THREADPOOL_SIZE wasn't enough. We fixed it by moving bcrypt out of the HTTP server into a NestJS native script.
Two weeks reading Shopify forums and 1-star app reviews revealed four recurring merchant pain points — and one underserved niche in inventory forecasting.
OOMKilled, CrashLoopBackOff, exit code 137 — Docker containers fail silently in production. Learn why teams miss alerts and what lightweight monitoring looks like.
Most developers configure SPF and DMARC once and forget them — until emails start bouncing. Learn why email authentication fails silently and how to monitor it.