Roy Lee

About

Roy Lee is a full stack web engineer with over 7 years' experience in web development. He is much proficient in JavaScript, TypeScript, Python and PHP but also in React, Vue, Express.js, Django and Laravel. As a senior web developer, he had participated in several projects from small to large scale for different industries and customers using latest technologies and frameworks in web development.

Employment

6 roles

Nov 2021 - Apr 2022 5 months

Senior Front End Developer

MJCZone

Built reusable components and responsive pages using TypeScript, Vue3, Quasar2, and Vuex.
Integrated real-time communication features inside the application with SignalR.
Collaborated with backend team to create several mini-apps that can be easily integrated into the page.
Researched and integrated GIS tools (ArcGIS and Google map API) and document management SDK to the application.

Feb 2019 - Jun 2021 2 years 4 months

Full Stack Web Engineer

Nexxo

Worked on the development and implementations of decentralized applications with React, Solidity, and Truffle.
Architected, developed, and deployed web/mobile applications with Express.js, PostgreSQL, React, React Native, Mobx, and Typescript.
Implemented unit testing and e2e testing in React projects with a testing library in React, Enzyme, and Cypress.
Architected and developed microservices using Koa.js, MySQL, Prisma, Elastic Search, and maintained monolith web applications with Django and React.

May 2016 - Feb 2019 2 years 9 months

Senior Web Developer

Loadsys Solutions

Led development team in the delivery of various DjangoReact and MERN stack projects requiring close cooperation among members to share information and develop solutions to meet a broad array of deliverables.
Designed, developed, and deployed more than four full-stack web applications according to business objectives and needs of various clients with React, Vue, Django, and Express.js.
Improved the page speed by 15% for the e-commerce site that generates $25 million annually in revenue by implementing Code-Splitting and Optimizing performance with React, GraphQL, and Apollo.
Implemented SEO in React application for an e-commerce site with a catalog of over 20,000 products leading to an increase in page views per session of 23% with SSR in Next.js.
Worked on building a customer-facing web application with Express.js, Prisma, Vue.js, PostgreSQL, and Node.js.
Built Progressive Web Application (PWA) with React, TypeScript, and GraphQL (Relay).
Deployed several web applications using Docker, Kubernetes, and AWS.

Sep 2015 - May 2016 8 months

Backend Developer

Loadsys Solutions

Maintained backend code built with Express.js, and MySQL and collaborate with the product team to implement new features plan for future products.
Designed, implemented, documented, and successfully deployed real-time applications with Node.js, Socket, and WebRTC.
Worked on MERN stack project as a cross developer with MongoDB, Express.js, React, and Node.js.

Apr 2015 - Sep 2015 5 months

Frontend Developer

Loadsys Solutions

Worked on the Payments team to save over 50,000 customers time and improve cash flow through the development of modern, responsive customer experiences using Angular and Ant Design Library.
Contributed to the in-house UI library to create reusable React components that saved over 200 hours of development time per month.
Created a web app MVP for a store delivery management platform with over 100 business customers to create, manage, and monitor deliveries using React and Redux.

Nov 2014 - Apr 2015 5 months

Frontend Developer

Liventus

Delivered responsive, cross-browser compatible, and accessibility compliant websites, achieving 19% faster load time than the industry average using React and Flux.
Collaborated with the UX/UI design teams to improve the website and applications, increasing conversion rates by 25% using SASS/SCSS and Bootstrap.
Expanded features, refined code, and improved performance with React, producing smoother operations and enhancing user engagement.