Alex Chen

Led frontend development for client web applications in e-commerce and fintech sectors. Architected scalable component systems, mentored junior developers, and established CI/CD pipelines. Collaborated directly with product managers and clients to define technical requirements and delivery timelines.

E-Commerce Platform Modernization

• Rebuilt legacy e-commerce frontend with Next.js to improve SEO, performance, and conversion rates for a fashion retailer with 100,000+ monthly visitors.
• Next.js 14, TypeScript, Tailwind CSS, Zustand, Stripe API, Vercel, Playwright
• Architected application structure, implemented server-side rendering for product pages, integrated Stripe payment flows, and established Playwright E2E testing suite.
• Tech Stack: Next.js SSR/SSG Tailwind CSS State Management Payment Integration E2E Testing
• Challenges: Performance Gains: Improved Lighthouse score from 62 to 94 and reduced time-to-first-byte by 40% through SSR and image optimization.
• Challenges: Conversion Uplift: Streamlined checkout flow contributing to 15% increase in completed transactions post-launch.

AI-Assisted Development Workflow Implementation

• Established AI-assisted software delivery practices using Claude Code and GitHub Copilot to accelerate feature development while maintaining quality gates for a fintech client application.
• Claude Code, GitHub Copilot, React, TypeScript, ESLint, Husky, GitHub Actions
• Led adoption of Claude Code for repository-context exploration and implementation planning; used GitHub Copilot for test generation and documentation updates. Enforced human-supervised workflow with local validation, CI checks, code review, and security review before deployment.
• Tech Stack: AI-Assisted Coding Code Review Test Generation Task Decomposition CI/CD
• Challenges: Workflow Efficiency: Reduced boilerplate coding time by 30% through structured task decomposition and AI-generated scaffolding with mandatory human review.
• Challenges: Quality Maintenance: Maintained zero security regressions by requiring generated changes to pass ESLint, type-checking, and peer review before merge.

Developed and maintained frontend features for a SaaS dashboard platform serving 5,000+ users. Collaborated with UX designers to implement responsive interfaces using React and TypeScript. Participated in code reviews, sprint planning, and daily standups within an agile team of 8 engineers. Assisted in migrating legacy jQuery components to modern React architecture.

Analytics Dashboard Redesign

• Complete UI overhaul of the core analytics dashboard to improve data visualization clarity and user engagement. Replaced static charts with interactive, real-time components using D3.js and React.
• React 18, TypeScript, Vite, D3.js, WebSocket, REST API, CSS Modules
• Implemented interactive chart components, optimized rendering performance for large datasets, integrated real-time data streaming via WebSocket, and ensured cross-browser compatibility.
• Tech Stack: React Hooks TypeScript D3.js WebSocket Responsive Design Performance Optimization
• Challenges: Rendering Performance: Reduced chart re-render time by 60% using React.memo and useMemo for complex data transformations.
• Challenges: Accessibility Compliance: Achieved WCAG 2.1 AA compliance for all dashboard components with keyboard navigation and screen reader support.

Component Library Migration

• Migrated internal UI component library from JavaScript to TypeScript with improved documentation and testing coverage for use across multiple product teams.
• TypeScript, React, Storybook, Jest, React Testing Library, Rollup
• Refactored 25+ components to TypeScript, wrote comprehensive unit tests, documented usage patterns in Storybook, and configured automated build pipeline.
• Tech Stack: TypeScript Migration Storybook Jest Component Design CI/CD Integration
• Challenges: Test Coverage: Increased test coverage from 45% to 92% with Jest and React Testing Library, reducing production bugs.