Tim Rutte's blogArticles on AWS, backend architecture and AI in production. From projects, not from slides.https://timrutte.de/enCutting AWS costs: from 15,000 to 2,500 euros a monthhttps://timrutte.de/en/blog/aws-cost-reduction-case-report/https://timrutte.de/en/blog/aws-cost-reduction-case-report/Twelve months of FinOps across two real AWS accounts: where the large amounts were, why Athena and CloudWatch cost more than the databases, and why commitments come last.Wed, 19 Aug 2026 12:00:00 GMTAn AI system on a zero budget: six decisions, three mistakeshttps://timrutte.de/en/blog/ai-in-production-on-zero-budget/https://timrutte.de/en/blog/ai-in-production-on-zero-budget/Six architectural decisions and three mistakes from an AI side project that must cost nothing. With real code and the places where it went wrong.Tue, 18 Aug 2026 12:00:00 GMTBad architecture sends no alerts. It just keeps costing.https://timrutte.de/en/blog/finops-aws-hidden-architecture-costs/https://timrutte.de/en/blog/finops-aws-hidden-architecture-costs/Where four- and five-figure amounts quietly disappear in grown AWS setups, and how to get them back without changing a single line of code.Thu, 11 Jun 2026 12:00:00 GMTWhen AWS loses a region: what actually matters when it gets serioushttps://timrutte.de/en/blog/aws-region-outage-multi-region/https://timrutte.de/en/blog/aws-region-outage-multi-region/What actually matters when an AWS region goes down: multi-region strategies, realistic failover concepts and the costs nobody plans for.Thu, 09 Apr 2026 12:00:00 GMTAgentic coding with spec-driven development: why your AI agent needs structure before it writes codehttps://timrutte.de/en/blog/agentic-coding-spec-driven-development/https://timrutte.de/en/blog/agentic-coding-spec-driven-development/Why your AI agent needs structure before it writes code. Spec-driven development as a method for predictable, consistent quality with AI tools.Mon, 30 Mar 2026 12:00:00 GMTGo in a PHP world: adding high-performance services without rebuilding everythinghttps://timrutte.de/en/blog/golang-in-a-php-world/https://timrutte.de/en/blog/golang-in-a-php-world/How I add new high-performance Go services to existing PHP systems without rebuilding everything. Strangler fig in practice instead of a big-bang rewrite.Tue, 03 Feb 2026 12:00:00 GMTWhy full rewrites almost always failhttps://timrutte.de/en/blog/why-full-rewrites-fail/https://timrutte.de/en/blog/why-full-rewrites-fail/Rewrites fail, and so does standing still. Why the complete rebuild almost never works and how incremental modernization delivers measurable results.Sun, 11 Jan 2026 12:00:00 GMTFrom Sphinx to Manticore Search: a migration about latency, relevance and operational disciplinehttps://timrutte.de/en/blog/from-sphinx-to-manticore-search/https://timrutte.de/en/blog/from-sphinx-to-manticore-search/A search migration from Sphinx to Manticore about latency, relevance and operational discipline. From 5 seconds to under 100 ms in practice.Thu, 10 Jul 2025 12:00:00 GMTTechnical debt as business risk, and why nobody listens until it is too latehttps://timrutte.de/en/blog/technical-debt-as-business-risk/https://timrutte.de/en/blog/technical-debt-as-business-risk/Technical debt is not a developer problem. It is a business risk, and it grows quietly until it becomes visible exactly when there is no room for it.Thu, 03 Apr 2025 12:00:00 GMT