Portfolio

San Lee

I build systems and make them easy to navigate.

Product, with an engineering background. A few things I've designed and built: event-driven services, an LLM classifier, and the architecture that ties independent pieces into one system.

Selected work

Three pieces: the classifier, the system around it, and how I frame the whole thing as product and program.

Systems design · cross-repo architecture

The System

Four independent repositories (an API, a classifier, an agent, and a knowledge base) that grew into one coherent system. A two-tier ADR convention records the cross-cutting decisions; a central portal makes the whole thing navigable.

  • Architecture
  • ADRs
  • Event-driven integration
Read the writeup

LLM classification · eval harness

Defense News Classifier

An LLM classifier that ingests defense-news items, tags them, and publishes results onto a Kafka topic, closing a consume-then-writeback loop with the notes API downstream. The component that started the whole system.

  • Python
  • Classification
  • Kafka
Read the writeup

Product · program management

Product & Program

The same system seen from above: who it's for, how success is measured, how the work is sequenced, and what could go wrong. The program layer is simulated, since it's a solo build, and the writeup says so plainly.

  • Product
  • Program
  • Roadmap & risks
Read the writeup

About

I'm a product person with an engineering background, with years in platform and infrastructure before moving into product. I like building systems where the hard part is the design and the seams between the pieces, and writing the decisions down so they hold up later. The work here is where I keep my hands in the craft.