Technical articles on backend architecture, distributed systems, event-driven design, and open source.https://goniszewski.com/en-ushttps://goniszewski.com/blog/26-03/decoupling-a-live-app-with-domain-events/https://goniszewski.com/blog/26-03/decoupling-a-live-app-with-domain-events/Part 2 of the IHA Migration Series: implementing a dual-write strategy and migrating core services to an event-driven architecture.Sat, 21 Mar 2026 00:00:00 GMTnextjsrabbitmqevent-drivenarchitecturetypescriptmigrationzodtestingRobert Goniszewskihttps://goniszewski.com/blog/26-02/from-nextjs-monolith-to-event-driven-architecture/https://goniszewski.com/blog/26-02/from-nextjs-monolith-to-event-driven-architecture/Part 1 of the IHA Migration Series — documenting the move from a Next.js monolith to a distributed, event-driven architecture using RabbitMQ, and the three pain points that made it necessary.Tue, 24 Feb 2026 00:00:00 GMTnextjsrabbitmqevent-drivenarchitecturetypescriptmigrationRobert Goniszewskihttps://goniszewski.com/blog/26-02/it-happened-again-engineering-a-system-for-verifiable-patterns/https://goniszewski.com/blog/26-02/it-happened-again-engineering-a-system-for-verifiable-patterns/How I designed and built IHA - a platform for tracking recurring events through structured records and source-backed timelines.Wed, 11 Feb 2026 00:00:00 GMTsystem designnext.jsbullmqarchitectureside projectRobert Goniszewskihttps://goniszewski.com/blog/26-02/grimoire-a-retrospective-on-building-open-source-tools/https://goniszewski.com/blog/26-02/grimoire-a-retrospective-on-building-open-source-tools/A post-mortem on building Grimoire: stack evolution, ecosystem design, migration strategy, and why development is paused.Mon, 09 Feb 2026 00:00:00 GMTsystem designsveltekitbundrizzle ormopen sourceRobert Goniszewski