David Chien

Software Engineer focused on frontend optimization, infrastructure modernization, and performance tuning for large-scale React applications. Currently based between Taipei, Taiwan πŸ‡ΉπŸ‡Ό and Seattle, USA πŸ‡ΊπŸ‡Έ.

Side Projects

Work Experiences

Software Engineer

Appier

July 2024 – Present

  • Modernized monorepo infrastructure by leading migration from Yarn/Lerna to pnpm/NX, reducing CI/CD pipeline execution time by 83%.
  • Designed and deployed a comprehensive logging service, enabling real-time performance monitoring and accelerating issue resolution by 15%.
  • Collaborated with cross-functional teams to implement scalable solutions and drive continuous improvement.
  • Acted as a key decision-maker in selecting and implementing new build tools.

Software Engineer Intern

Appier

July 2023 – July 2024

  • Developed an intuitive campaign management dashboard, streamlining manager workflows.
  • Optimized mission-critical page performance, reducing load time from unresponsive to 1 second.
  • Spearheaded migration from Webpack to Rspack, achieving a 10x improvement in build times.
  • Led major UI library upgrade, coordinating systematic migration across multiple applications and teams.

Software Engineer

LangLive

June 2022 – June 2023

  • Refactored gift animation system with WebGL, reducing CPU usage by 30%.
  • Re-architected data fetching, cutting API calls by 50% and improving page load speed.
  • Implemented end-to-end testing with Playwright across three products.

Software Engineer (Part time)

Dimorder

Feb 2022 – Feb 2023

Education

National Taipei University

Bachelor of Science: Computer Science

2019 - 2024