Hi, I am ERIC FEI
FRONTEND DEVELOPER
FrontEnd Developer with 5+ years of experience. Proven expertise in the React ecosystem and modern web architecture. Adept at modernizing legacy systems, building scalable design systems from the ground up, and delivering high-performance, user-centric interfaces. Strong cross-functional collaboration skills with a solid backend foundation in Express.js and API integration.
Eric Fei
Education
Vancouver Film School
3D Animation & Visual Effects, 2017-2018
Tamkang University
Civil Engineering, 2010-2014
Technical Skills
JavaScript
TypeScript
Python
HTML
CSS
Tailwind
Css-in-Js
MUI
React.js
Next.js
Plasmo
Redux
Redux-saga
Redux-thunk
zustand
Git
Playwright
Cypress.io
i18n
Express.js
Mongoose
MongoDB
MySQL
Prisma
Storybook
Experiences
Mid. Frontend Developer
AlleyPin
2024.08 - Present
- Modernized LINE LIFF interfaces, delivering a smoother, more intuitive user experience that boosted engagement.
- Migrated legacy services to a modern Next.js architecture, incorporating App Router, server components, and Sentry logging, reducing page load times by almost 30% and boosting developer productivity like 1 times faster through reusable utilities and scalable design.
- Established a design system from scratch, reducing UI/UX inconsistencies and improving cross-team efficiency.
- Led JavaScript to TypeScript migration, enhancing type safety, reducing runtime bugs, and simplifying code maintenance.
- Implemented i18n across 3 core services via a CI/CD-integrated workflow, cutting manual translation work and accelerating global readiness.
- Architected high-priority services, handling POC planning, API contract alignment, and full implementation.
- Optimized Express.js APIs, resolving bottlenecks and enabling faster frontend-backend delivery.
- Developed Chrome extensions for direct interaction with products like LINE OA boosting user retention by 15% and enhancing product accessibility.
Mid. Frontend Developer
Partipost
2022.03 - 2024.08
- Refactored key features in React, reducing unnecessary re-renders by 10x and improving load times by 30%, delivering a seamless and efficient user experience.
- Built a scalable RBAC system and advanced comment module, cutting ops workload by 50%.
- Led and Created a modular design system with advanced patterns and Storybook, accelerating feature delivery and ensuring design consistency.
- Championed end-to-end testing with Playwright and GitLab CI, increasing release reliability by 40% and enhancing developer confidence in production deployments.
- Automated i18n processes using Fortitude CLI and integrated Amplitude analytics for data-driven product improvements.
- Delivered multiple POCs, including a new onboarding flow and redesigned dashboard, directly shaping product architecture and strategic direction.
Jr. Frontend Developer
Kuobrothers Corp
2021.05 - 2022.03
- Re-architected a monolithic e-commerce platform into a high-performance Next.js application, improving page load speeds by 60% which enhance the lighthouse performance score to almost reach 100 and enabling seamless scalability for future growth.
- Built a real-time D3-powered sales dashboard for live TV commerce, enabling instant sales insights and better business decisions.
- Developed an AMP page that boosted the main product website SEO score.
- Implemented Cypress E2E testing, strengthening test coverage and reducing release regressions.
- Optimized web app performance ( code-splitting, react optimization skills, progressive images ... etc) which help the web app reach 100 performance scores and 92 SEO scores, and more than 91% great user experience links.
Jr. Frontend Developer
Glaibo Digital
2021.03 - 2022.05
- Built dynamic features using Next.js, TypeScript, and Apollo GraphQL, ensuring fast and efficient client-side rendering.
- Developed reusable service-layer utilities, promoting code reuse and easing long-term maintenance across projects.
Frontend Developer Trainee
AppWorks school
2020.09 - 2021.01
- Developed a Project management system real-time chat application using React and Firebase, enhancing user engagement and interaction.
- Created a responsive e-commerce website with HTML, CSS, and JavaScript.
Project Manager
MoonShine Animation Studio
2019.02 - 2020.09
- Movie, commercial, and other digital media project management.
- Managed and scheduled work process for 60 - 120 members by cases.
- Successfully engaged in negotiations and delivered projects, resulting in a significant increase of 20 million in annual revenue for the company.
- Maintained relationships with major corporate clients, such as Asus, Acer, and other renowned brands.
Get In Touch
Feel free to reach out if you're looking for a developer, have a question, or just want to connect.