Patrick O'Brien

About

I architect and build production LLM systems for finance and legal technology companies. Based in Toronto, I have shipped AI document review tools for law firms, automated covenant monitoring for investment banks, and AI-powered reconciliation systems for accounting software companies. My technical focus is on reliability: building systems that handle edge cases, degrade gracefully, and produce auditable outputs. I work with LangGraph for orchestration, Anthropic's Claude for careful reasoning tasks, and PostgreSQL for structured AI memory and logging. Former backend lead at a Canadian fintech that processed $2B in annual transactions. Available for long-term contracts only.

Skills & Expertise

AI Stack

Industries