Michał Iżewski

Backend engineer with 18+ years building and running production systems. I started deep in the PHP world and grew into a polyglot, infrastructure-aware engineer; these days I care less about the language and more about how a system behaves under load, where it breaks, and what the trade-offs actually cost. Strong on reliability, performance, and the operational side: AWS, CI/CD, the things that only show up in production. I write these posts mostly as case studies for myself: take a real problem, understand the system underneath, make a decision, and spell out what it cost. One concrete example: I cut a CI pipeline from 30+ minutes to under 5 by chasing I/O bottlenecks instead of throwing hardware at it.