Sean Leighton

Sean Leighton

Full Stack Engineer

I turn complex systems into clear experiences — at scale, across the stack, and increasingly with AI.

By day I'm a Senior Full Stack Engineer at PoliteMail, where I've shipped everything from backend data pipelines to a Microsoft Teams product built on AI-driven sentiment analysis. Outside of work I build agentic AI applications, and I bring the same discipline to engineering that a lifetime of competitive running and adaptive ski coaching taught me.

Projects

DevOnboard

A self-hosted tool that scans a GitHub repo, runs an AI-powered gap interview, and generates a structured developer onboarding guide — so new hires reach their first commit without senior hand-holding.

  • Python
  • FastAPI
  • React
  • TypeScript
  • PostgreSQL
  • Claude API
  • Docker

Professor

A two-agent AI tutoring system: a Professor agent delivers structured lectures and quizzes with assessment gating, while a TA agent independently reviews lecture accuracy and quality using a second model — agents checking agents.

  • Python
  • Claude API
  • Ollama
  • Perplexity API
  • pytest
All projects →

Recent Devlog

All entries →