Jun Guo

Portfolio

• QuBlack

  A font family and its showcase site, with a build step that cuts the woff2 files on every release.

  • Astro
  • React
  • Tailwind CSS
  • shadcn/ui

  VisitSource

• Bigface

  A palette and token pipeline that feeds a light and dark business theme across several sites.

  • Astro
  • Tailwind CSS
  • shadcn/ui
  • Design tokens

  Visit

• Subsdaddy

  A dashboard that compares LLM subscription capacity and pricing, prerendered to static files.

  • TanStack Start
  • TypeScript
  • Bun

  Visit

• June Agent

  Agent engine on Effect 4 with five model providers.

  • TypeScript
  • Effect
  • Bun

  Private project. No public link.

Resume

Senior Software Engineer

gjuoun@gmail.com ·github.com/gjuoun ·linkedin.com/in/gjuoun ·Montreal, Canada

Jun Guo is a team player and open-source contributor with 5 years of experience building scalable web applications in JavaScript and TypeScript, leading teams to deliver complex projects from ideation to completion. He works closely with data teams and diverse stakeholders to integrate AI features into backend systems, learns new technologies quickly through hands-on work, and applies large language models to enhance work processes.

Full resume

Posts

1. 01

   Effect, one function at a time

   Sequence steps with Effect.gen

   Write sequential Effect code with yield*.

2. 02

   Effect, one function at a time

   Wrap a promise with Effect.tryPromise

   Turn a promise that can fail into an Effect.

3. 03

   Effect, one function at a time

   Recover one error with Effect.catchTag

   Recover from one tagged error and leave the others alone.

All posts