Sage Lee

Everett, WA | 206-992-3843 | sage@xlerates.com | sagelee.dev

AI Product Builder

Specializing in decision systems for complex operational environments.

Product & AI Systems

getTodd | Founder / AI Systems Architect

  • Built an AI loan-structuring intelligence engine for automotive finance managers.
  • Designed a hybrid architecture combining indexed document signals with inference-time reasoning over lender rate sheets.
  • Extracts three key metadata signals to route queries while preserving full-document reasoning.
  • Uses Gemini for visual reasoning over lender PDFs and GPT for natural-language parsing.
  • Combines LLM reasoning with deterministic constraints to prevent hallucinated lender rules.

LotTalk | Founder / Product Architect

  • Built a real-time communication platform designed for dealership personnel.
  • Developed messaging infrastructure with React Native, TypeScript, and Supabase.
  • Implemented channels, threads, typing indicators, and broadcast messaging.
  • Designed architecture to support future OEM, lender, and vendor integrations.

gitpushmain (GitPush) | Founder / Systems Architect

  • Built a developer coordination platform enabling instant live coding sessions.
  • Designed a lobby-based collaboration model inspired by multiplayer matchmaking.
  • Implemented GitHub OAuth identity with Supabase session orchestration.
  • Created ephemeral Discord collaboration environments managed by a custom automation bot.

Professional Experience

Finance & Insurance Manager | Doug's Lynnwood Mazda, Honda of Seattle, Klein Honda

2015 - Present

  • 10+ years structuring automotive financing across banks and credit unions.
  • Navigated credit tiers, advance limits, vehicle age constraints, and lender underwriting rules.
  • Optimized approval probability and deal profitability through strategic loan engineering.

Technical & Product Skills

  • AI Architecture: LLM System Architecture, Natural Language Interfaces, LLM Tooling (GPT, Gemini).
  • Development: TypeScript, React Native / Expo, Supabase / PostgreSQL, Cursor AI.
  • Strategy: Product Strategy, Workflow Systems Design, Operational Systems Engineering.