A personal blog by Bart Hazen about software engineering, infrastructure, DevOps, AI, and the products I build.https://nimbleflux.nl/en-ushi@nimbleflux.nl (Bart Hazen)hi@nimbleflux.nl (Bart Hazen)Thu, 28 May 2026 18:51:56 GMThttps://nimbleflux.nl/blog/2026/05/clickhouse-query-analyzer/https://nimbleflux.nl/blog/2026/05/clickhouse-query-analyzer/A single-binary web app for analyzing ClickHouse query performance. Flame graphs, thread breakdowns, query fingerprints, and table optimization. Built because the built-in tools weren't enough.Fri, 29 May 2026 00:00:00 GMTClickHouseOpen SourceSelf-HostingDeveloper ToolsBart Hazen <hi@nimbleflux.nl>https://nimbleflux.nl/blog/2026/04/multi-tenancy-with-postgres-fdw/https://nimbleflux.nl/blog/2026/04/multi-tenancy-with-postgres-fdw/How I added multi-tenant isolation to Fluxbase using PostgreSQL's Foreign Data Wrapper, Row Level Security, and a hybrid database architecture, without breaking backward compatibility.Mon, 25 May 2026 00:00:00 GMTFluxbasePostgreSQLArchitectureOpen SourceBart Hazen <hi@nimbleflux.nl>https://nimbleflux.nl/blog/2026/03/introducing-fluxbase/https://nimbleflux.nl/blog/2026/03/introducing-fluxbase/A lightweight, single-binary Backend-as-a-Service. All the essential backend services in one Go binary, with PostgreSQL as the only dependency.Sun, 08 Mar 2026 00:00:00 GMTFluxbaseBackendSelf-HostingOpen SourceBart Hazen <hi@nimbleflux.nl>https://nimbleflux.nl/blog/2026/03/introducing-nimbleflux/https://nimbleflux.nl/blog/2026/03/introducing-nimbleflux/A new venture focused on rapid product development, building tools that solve real problems while learning and iterating quickly.Sun, 08 Mar 2026 00:00:00 GMTBart Hazen <hi@nimbleflux.nl>https://nimbleflux.nl/blog/2026/03/introducing-wayli/https://nimbleflux.nl/blog/2026/03/introducing-wayli/A privacy-first location tracking app born from frustration with backend complexity. How 15 containers led to building Fluxbase.Sun, 08 Mar 2026 00:00:00 GMTSelf-HostingPrivacyBart Hazen <hi@nimbleflux.nl>