Letters on building, identity, responsibility, and the work that doesn't show up in git. Personal and technical. No schedule, no funnel. A letter lands when there's something worth saying.
Certificate renewal had been failing for thirteen days. The blackbox exporter said 75 days remaining. The origin had 17. When a CDN terminates TLS, every external certificate probe you have is measuring the wrong certificate.
Read the letterMulti-tenant isolation with a Postgres schema per bounded context. Separate Flyway migration streams, a separate EntityManagerFactory each, and the HikariCP pool sizing that quietly decides whether your decomposition survives contact with max_connections.
Read the letterSwapping the message broker under a 65-module Kotlin modular monolith. Six versioned topics, KRaft, an idempotent producer with acks=all, and why every publish call site stayed exactly as it was.
Read the letterDanceClub now speaks 15 languages. The gap between two and fifteen closed in one night. The hardest bug wasn't the translation. It was the safety net.
Read the letterA spreadsheet with 72 dance events across Europe. Instead of weeks of data entry, I built a pipeline that scrapes, validates, and publishes. 59 went live. 13 were correctly refused.
Read the letterA Facebook share URL that returned nothing. An event website that redirected to a different business. An Instagram profile instead of an event page. When you automate at scale, 'event link' means 10 different things.
Read the letterA real PulseAI crisis: a production workflow that compiled, passed every validator, and silently shipped wrong data for three days. What the fix proved about Rule III and Rule VIII of the manifesto.
Read the letterSix months to build DanceClub. More than two years to become the person who could. A letter about responsibility, the work that doesn't show up in git, and the laptop my mother bought me with the last money she had.
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