Notes and developer tools on backend, system design, PostgreSQL, Redis, Laravel and AI-assisted engineering.https://sade.dev/en-UShttps://sade.dev/en/systems/race-conditions-and-gaps-in-sequential-numbering/https://sade.dev/en/systems/race-conditions-and-gaps-in-sequential-numbering/Generating legally sequential, gap-free numbers with parallel workers: the JIT reservation pattern that solves race conditions and gaps togetherWed, 03 Jun 2026 00:00:00 GMTarchitectureproductionconcurrencyqueueidempotencySysteminfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/journal/when-i-move-to-microservices/https://sade.dev/en/journal/when-i-move-to-microservices/The measured signals that justify moving from a monolith to a distributed architecture — and the common false reasons that say it's still too earlySat, 30 May 2026 00:00:00 GMTarchitecturemicroservicesdecisionsopinionJournalinfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/journal/gitflow-vs-github-flow/https://sade.dev/en/journal/gitflow-vs-github-flow/Practical criteria for picking a branching strategy by product model, version count, and deploy rhythm — and how each model breaks in the wrong place.Sat, 23 May 2026 00:00:00 GMTgitworkflowbranchingdecisionsopinionJournalinfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/journal/when-i-switch-to-trunk-based/https://sade.dev/en/journal/when-i-switch-to-trunk-based/Why release branches break for high-frequency deploy teams and how much of trunk-based is really discipline — the thresholds I cross and the ones I don'tSat, 23 May 2026 00:00:00 GMTgitworkflowdeploydecisionsopinionJournalinfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/journal/why-i-start-with-a-modular-monolith/https://sade.dev/en/journal/why-i-start-with-a-modular-monolith/The case for drawing clean module boundaries inside a single deployable app before jumping to microservices — and when I stop doing it.Sat, 23 May 2026 00:00:00 GMTarchitecturemodular-monolithdecisionsopinionJournalinfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/systems/data-intensive-systems-breaking-points/https://sade.dev/en/systems/data-intensive-systems-breaking-points/As data load grows, where does boring architecture break? Working set, read replicas, partitioning, write load and a separate data layer — the breaking points in order, and what each one costsWed, 20 May 2026 00:00:00 GMTpostgresqlarchitectureproductionscalingreplicationSysteminfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/journal/why-boring-architecture/https://sade.dev/en/journal/why-boring-architecture/The pragmatic case for choosing proven tools over chasing new technology. This is not cowardice, it is a budget decision.Fri, 15 May 2026 00:00:00 GMTarchitecturedecisionsopinionJournalinfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/notes/shared-redis-namespace-isolation/https://sade.dev/en/notes/shared-redis-namespace-isolation/The pattern I use to avoid key collisions and TTL accidents when a single Redis instance is shared across several projectsTue, 12 May 2026 00:00:00 GMTredisproductionarchitectureNoteinfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/journal/ai-assisted-engineering-workflow/https://sade.dev/en/journal/ai-assisted-engineering-workflow/The seven rules I follow to use Claude Code and similar agents on production code with confidence — not a skeptic, a discipline manifestoSun, 10 May 2026 00:00:00 GMTai-workflowproductivityopinionJournalinfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/notes/pgbackrest-postgresql-backup-strategy/https://sade.dev/en/notes/pgbackrest-postgresql-backup-strategy/pg_dump alone is not a backup. A PITR-capable, compressed, verifiable backup architecture with pgBackRestFri, 08 May 2026 00:00:00 GMTpostgresqlbackupproductionpgbackrestNoteinfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/notes/laravel-queue-production-slowdown/https://sade.dev/en/notes/laravel-queue-production-slowdown/Laravel queue workers are flawless locally and slow in production. The five most common reasons developers overlookSun, 03 May 2026 00:00:00 GMTlaravelqueueproductionredisNoteinfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/systems/single-vps-multi-project-architecture/https://sade.dev/en/systems/single-vps-multi-project-architecture/One VPS, several independent apps. Deliberate minimalism over Kubernetes: user isolation, separate PHP-FPM pools, shared PostgreSQL/Redis, a plain deploy.Thu, 30 Apr 2026 00:00:00 GMTvpsarchitecturenginxpostgresqlredisSysteminfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/notes/nginx-php-fpm-pool-separation/https://sade.dev/en/notes/nginx-php-fpm-pool-separation/The concrete benefits of defining a separate pool per application instead of a single PHP-FPM pool when running multiple PHP apps on one VPSSun, 26 Apr 2026 00:00:00 GMTnginxphp-fpmproductionvpsNoteinfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/systems/laravel-production-stack/https://sade.dev/en/systems/laravel-production-stack/A production-grade Laravel setup with Nginx + PHP-FPM + Redis + PostgreSQL + Supervisor + Horizon. Each piece job and what you lose if you drop itWed, 22 Apr 2026 00:00:00 GMTlaravelphpproductionarchitectureSysteminfo@muhammetsafak.com.tr (Muhammet Şafak)https://sade.dev/en/notes/pgbouncer-auth-query/https://sade.dev/en/notes/pgbouncer-auth-query/A practical setup for dynamic user authentication via `auth_query` instead of `userlist.txt` when running pgBouncerSun, 19 Apr 2026 00:00:00 GMTpostgresqlpgbouncerproductionNoteinfo@muhammetsafak.com.tr (Muhammet Şafak)