Backend engineer. Three and a half years on pipelines that turn untrustworthy inputs — paper forms, ERP ledgers, OCR output — into numbers that get filed with regulators. The failures I care about aren't the ones that throw; they're the ones where the number is quietly wrong and nothing says so. Most of what I write here is about finding those, usually late. Local 8B models on a 16GB laptop are a side project, and I write about them as one. TypeScript · NestJS · PostgreSQL · LangGraph.