Li Ou

Delivered UI and API features across ~40 sprints in a cross-functional team, owning implementation from Figma review through release and post-release fixes. Improved Core Web Vitals by reducing JS payload (selective imports) and adopting Next.js SSR/SSG; added React Query caching to cut repeat-fetch latency and stabilize page interactions. Integrated CodeRabbit into CI (GitHub Actions) and reviewed 30+ PRs, standardizing feedback and shortening review cycles. Implemented Clerk authentication for secure, role-based access, ensuring personalized workspaces. Reduced unnecessary React re-renders with memoization, boosting key-page interaction latency by ~25%. Refactored shared UI/data-fetch logic into reusable custom hooks, reducing duplicated code and speeding feature development.

Built a crypto portfolio web app with real-time market data using React + TypeScript, implementing watchlists/holdings tracking and authenticated portfolio persistence. Developed responsive, accessible UIs from a Figma prototype with Tailwind CSS and Styled Components, ensuring pixel-accurate UI across devices. Visualized market data with dynamic charts (Chart.js). Implemented Express REST APIs with Prisma + PostgreSQL to persist portfolios (CRUD), enforcing authorization and input validation. Optimized state architecture by splitting contexts into smaller providers, reducing unnecessary re-renders and improving overall UI performance by ~40%. Deployed the app to AWS EC2 with Nginx/HTTPS, environment secrets, and basic uptime monitoring.

Maintenance Service Technician, Burlingame CA, delivering on-site maintenance and technical support for avionics systems.