Essays and lab notes on AI-native software engineering, engineering leadership and organizational design.https://matthiasstier.dev/https://matthiasstier.dev/lab/local-model-tetris/https://matthiasstier.dev/lab/local-model-tetris/A local Qwen3.8-27B on one RTX 4090 built a Rust/Svelte/Tauri Tetris at 35 tokens a second; GPT-5.6 reviewed it read-only; I measured seven rounds. Good code, completion reports that could not be trusted, and a third of the clock spent on compaction.Sun, 23 Aug 2026 00:00:00 GMThttps://matthiasstier.dev/writing/i-was-the-bottleneck/https://matthiasstier.dev/writing/i-was-the-bottleneck/What more than a decade of enterprise platform delivery and eight weeks of running AI agent teams at home taught me about where software organizations break next.Thu, 20 Aug 2026 00:00:00 GMT