Notes from the backend — and the long version of the projects on the home page.
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What curiosity from a workshop turned into: a retrieval-augmented chatbot built from scratch for this site, with its own retrieval, guardrails and rate limits.
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Designed drag-and-drop reordering for OKR goals using gap-based float ranking, so moving one item touches a single row instead of rewriting the list. Hardened with row locking after production exposed a real concurrency race.
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Designed and owned the domain layer of Happy5 Performance's Jira integration, the sync engine that turns Jira projects, issues and workflow states into enterprise OKR goals, tasks, ownership and live progress. Still the production code path four years later.