About Me

I'm a Full Stack Developer with 9+ years of experience building web applications using TypeScript, Node.js, and React. I take end-to-end ownership from requirements analysis and system design to backend development, frontend implementation, testing, and deployment.

Skills

  • TypeScript
  • JavaScript
  • Python
  • PHP
  • React
  • Next.js
  • Vue.js
  • Nuxt.js
  • Node.js
  • NestJS
  • Express
  • FastAPI
  • PostgreSQL
  • MySQL
  • Redis
  • AWS
  • Docker
  • Terraform
  • GitHub Actions
  • Jest
  • Vitest
  • Playwright

Experience

  1. Full Stack Developer

    Aug 2024 — Present

    OPENHEART Inc.

    • Led backend architecture, database design, and web API development with TypeScript, Node.js, NestJS and AWS.
    • Designed a scalable cloud 3D data generation pipeline integrating object storage (R2) and a distributed job queue (SQS) to enable asynchronous processing of long-running jobs.
    • Implemented performance monitoring with Datadog and improved RESTful API latency by 50% by eliminating key bottlenecks.
    • Designed and maintained CI/CD pipelines using GitHub Actions, reducing CI test runtime by 50%.
    • Built an AI-powered bug-fix pipeline using GenAI tools to auto-generate PRs and documentation, cutting bug resolution lead time by 30%.
    • Designed and implemented automated test suites using Jest, reaching 70% coverage for critical backend services.

  2. Frontend Developer

    Jun 2021 — Mar 2024

    YAMAP Inc.

    • Led the frontend team as Tech Lead, mentoring junior engineers through pair programming, structured code reviews, and regular feedback cycles.
    • Reduced render time from 200ms to 50ms by optimizing React component state updates and lifecycles to eliminate unnecessary re-renders.
    • Aligned code review goals across the team and reinforced coding standards to prevent regressions and reduce spec-miss defects.
    • Drove test automation adoption end-to-end, raising coverage from 2% to 65% and unblocking regular dependency upgrades.

  3. Full Stack Developer

    Apr 2016 — May 2021

    Hamee Corp.

    • Built and maintained E-commerce SaaS platform features using PHP and HTML/CSS/JavaScript.
    • Led the migration of a legacy E-Commerce platform UI, refactoring 10,000+ lines of code to improve performance and maintainability.
    • Designed and implemented a memory-efficient chunked CSV import feature with PHP, processing 10,000+ rows without memory overflow.
    • Developed API servers using Node.js and AWS Lambda to facilitate communication between mobile applications and IoT products.