# sade.dev > A notebook on backend and systems engineering. Production lessons, architecture decisions and practical developer tools. > (tr) Backend ve sistem mühendisliği üzerine bir not defteri. Üretim dersleri, mimari kararlar ve pratik geliştirici araçları. This site is bilingual. Each locale has its own content index and its own full-text corpus; start from the index of the language you need. ## Locales - [Türkçe](https://sade.dev/tr/llms.txt): Backend, sistem tasarımı, PostgreSQL, Redis, Laravel ve AI-destekli mühendislik üzerine Türkçe notlar ve geliştirici araçları. - [English](https://sade.dev/en/llms.txt): Notes and developer tools on backend, system design, PostgreSQL, Redis, Laravel and AI-assisted engineering. ## Full text - [Türkçe — full text](https://sade.dev/tr/llms-full.txt): every Turkish article in one document - [English — full text](https://sade.dev/en/llms-full.txt): every English article in one document