Writing on AI workflows, product development, psychometrics, and building across multiple domains.https://www.blazejmrozinski.com/https://www.blazejmrozinski.com/blog/psychometric-analysis-university-exams/https://www.blazejmrozinski.com/blog/psychometric-analysis-university-exams/A psychometric analysis of university exams using classical test theory and item response theory. Real findings on item discrimination, distractor analysis, dead options, the Wright map, the test information function, and how SEM decides pass/fail at the margin.Wed, 15 Apr 2026 00:00:00 GMThttps://www.blazejmrozinski.com/blog/saas-is-dead-narrative/https://www.blazejmrozinski.com/blog/saas-is-dead-narrative/The 'SaaS is dead' narrative gets the diagnosis right and the prognosis wrong. AI makes code cheap. It barely touches trust, switching costs, and domain expertise — the parts that actually make a SaaS business model defensible.Mon, 13 Apr 2026 00:00:00 GMThttps://www.blazejmrozinski.com/blog/wp-infra-04-four-layers-of-caching/https://www.blazejmrozinski.com/blog/wp-infra-04-four-layers-of-caching/Four-layer WordPress caching stack for performance optimization: Cloudflare CDN, Nginx FastCGI page cache, Redis Object Cache Pro, and PHP OPcache with JIT. Sub-50ms TTFB with WooCommerce bypass rules.Sun, 12 Apr 2026 00:00:00 GMThttps://www.blazejmrozinski.com/blog/wp-infra-03-deploying-wordpress/https://www.blazejmrozinski.com/blog/wp-infra-03-deploying-wordpress/Production WordPress deployment on a VPS: wp-config.php constants, Redis Object Cache Pro setup, Nginx vhosts, SSL via Cloudflare, and the wp-config ordering bug nobody warns you about.Thu, 09 Apr 2026 00:00:00 GMThttps://www.blazejmrozinski.com/blog/how-i-taught-ai-to-work-like-a-colleague/https://www.blazejmrozinski.com/blog/how-i-taught-ai-to-work-like-a-colleague/A hands-on guide to configuring Claude Code with subagents, skills, role definitions, safety protocols, and feedback loops. How I turned a capable AI coding assistant into a personalized technical partner over weeks of real work.Tue, 07 Apr 2026 00:00:00 GMThttps://www.blazejmrozinski.com/blog/wp-infra-02-building-the-lemp-stack/https://www.blazejmrozinski.com/blog/wp-infra-02-building-the-lemp-stack/Step-by-step LEMP stack setup for WordPress on a Hetzner VPS. Nginx tuning, MariaDB 11.8 InnoDB configuration, PHP 8.4 FPM static pools, OPcache JIT, and kernel optimization. A practical WordPress performance optimization guide.Mon, 06 Apr 2026 00:00:00 GMThttps://www.blazejmrozinski.com/blog/building-a-brain-for-your-ai-cto/https://www.blazejmrozinski.com/blog/building-a-brain-for-your-ai-cto/AI coding assistants work well in a single repo. They fall apart across multiple projects and companies. I built a 30-document knowledge base that gives AI full context in 30 seconds instead of 15 minutes.Sat, 04 Apr 2026 00:00:00 GMThttps://www.blazejmrozinski.com/blog/wp-infra-01-why-i-ditched-managed-hosting/https://www.blazejmrozinski.com/blog/wp-infra-01-why-i-ditched-managed-hosting/I moved my WordPress and WooCommerce sites from managed hosting to a Hetzner VPS. Full walkthrough of server provisioning, SSH hardening, and firewall setup on Debian 13.Wed, 01 Apr 2026 00:00:00 GMThttps://www.blazejmrozinski.com/blog/seo-architecture-before-first-visitor/https://www.blazejmrozinski.com/blog/seo-architecture-before-first-visitor/Most founders optimize SEO after launching. I built IndexNow, multi-sitemaps, JSON-LD structured data, and consent-aware analytics into a new website before its first visitor. A technical SEO architecture guide for a site that doesn't exist yet.Wed, 25 Mar 2026 00:00:00 GMThttps://www.blazejmrozinski.com/blog/personal-site-as-product/https://www.blazejmrozinski.com/blog/personal-site-as-product/Most personal websites are abandoned brochures. I built mine in Astro in 5 days with 70+ commits, typed content schemas, JSON-LD structured data, and an automated asset pipeline. A practitioner case study in personal website design.Mon, 16 Mar 2026 00:00:00 GMT