Ken Lu

Rails services and an Angular app for a healthcare coaching platform.

• Saved coaches 10 hours a week

  Led a vendor integration over SFTP that attaches screening results to each member automatically.

• Moved 60K+ users to a single login

  Integrated Auth0 SSO across an Angular app and several Rails services.

• Gave 15+ hours a week back to client work

  Designed a rule-based messaging system that sends 600+ messages a week, with a database constraint that blocks duplicates.

• Cut page load times by 50%

  Tuned SQL queries and indexes on a Rails monolith with 120K+ case records.

Found $300+ in subscriptions I'd forgotten about.

A personal expense tracker with spending by category and automatic tracking of recurring bills. Deployed to a DigitalOcean server.

Ruby on Rails · Hotwire · Docker · Kamal

Chat with a PDF, with answers only from that PDF.

A RAG app where a metadata filter scopes every search to the chat's own file. It caches embeddings to skip repeat work and says so when the answer isn't in the document.

Next.js · Convex · LangChain · OpenAI

Turned 45-minute sales call reviews into 5-minute summaries.

A GPT-4 tool that flags objections, commitments, and coaching moments in call transcripts. Managers highlight passages to steer the analysis without rerunning the whole call.

Next.js · GPT-4 · 36 hours