JOHN HENRY LEE
833 Hunters Creek Drive, Sacramento, CA 95838
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Summary
Senior Frontend Engineer with 6+ years of experience building scalable, high-performance web
applications with modern JavaScript frameworks. Specialized in creating responsive, accessible
interfaces and optimizing frontend architecture. Proven track record of leading development teams,
implementing best practices, and delivering complex projects on schedule. Passionate about web
performance optimization and creating exceptional user experiences through clean, maintainable code.
Skill
● Languages: Javascript(ES6+)/Typescript, Python, HTML5, CSS3/SASS
● Frontend Development: React.js, Next.js, Vue.js, Angular.js, Svelte, Solid.js, Qwik,
● UI/UX: Material UI, Tailwind CSS, Styled Components, Responsive Design, Accessibility(WCAG
2.1), HeroUI
● State Management: Redux, Context API, Zustand, Recoil, Pinia, NgRx
● Web Performance: Core Web Vitals, Lighthouse, Bundle analysis, Lazy loading, Service
Workers, PWAs
● Database Management: MySQL, PostgreSQL, MongoDB, DynamoDB, Redis, Firebase
● DevOps & Deployment: CI/CD pipelines, Docker, AWS(S3, RDS, Lambda, EC2), Vercel, Netlify
● Quality Assurance: Jest, Cypress, TDD/BDD methodologies
● Development Tools: Git, SVN, Bitbucket, GitHub Actions, Webpack, Vite, Babel, ESLint,
npm/yarn
● API Technologies: REST, GraphQL, WebSockets, Server-Sent Events
● Collaboration: Agile/Scrum, Jira, Confluence
Experience
March 2023 - October 2024
Andersen - Senior Frontend Engineer
● Led frontend development for a financial services platform serving 500,000+ users, implementing
React.js with TypeScript and Next.js
● Architected and implemented a component library used across 5 product teams, reducing
development time by 30%
● Optimized application performance by implementing code splitting and lazy loading, improving
load times by 45%
● Implemented micro-frontend architecture that allowed 3 teams to work independently while
maintaining consistent UI
● Led technical planning sessions and made architecture decisions that improved system scalability
and maintainability
● Mentored 4 junior developers through code reviews and pair programming sessions
● Established frontend testing standards using Jest and Cypress, achieving 85% test coverage
● Collaborated with UX/UI team to implement responsive designs and ensure WCAG 2.1 AA
compliance
● Created CI/CD pipelines that reduced deployment time from 45 minutes to 10 minutes
June 2021 - February 2023
ServiceNow - Frontend Developer
● Developed and maintained frontend features for ServiceNow's enterprise platform using Vue.js
and TypeScript
● Built reusable components and implemented state management solutions with Vuex
● Reduced bundle size by 35% through optimization techniques and modern build tools
● Integrated RESTful APIs and GraphQL endpoints for data retrieval and manipulation
● Participated in sprint planning and agile development processes
● Collaborated with backend developers to design and implement new features
July 2019 - May 2021
Accel Web Solutions - Junior Web Developer
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Developed responsive web applications using React.js, HTML5, and CSS3
Created and maintained REST API integrations for client websites
Implemented UI components based on design specifications using Material UI
Utilized Git for version control and collaborated through GitHub pull requests
Participated in daily stand-ups and biweekly sprint planning
Resolved cross-browser compatibility issues for client websites
Education
August 2015 - May 2019
University of California, Davis - Bachelor of science
