91.1%
faster load time
Yahoo! high-traffic SPA
Willian Rodrigues · Senior Frontend Engineer · Brazil
I build React/Next.js and React Native products with strong performance, reliable delivery, and clean UX. This homepage is resume-first: outcomes, technical depth, and selected side projects.
faster load time
Yahoo! high-traffic SPA
bundle reduction
Webpack + code splitting
faster TTI
measurable UX performance gain
monthly visitors impacted
Next.js migration at GPA
Frontend Engineer (Lead)
Migrated legacy React/Kotlin to Next.js with 0 downtime, shipped AI admin workflow chat, and added Playwright guardrails for release confidence.
Frontend Engineer
Built a 60fps PWA editor with multi-layer audio and websocket live preview under 100ms for physical animatronic devices.
Frontend Engineer
Delivered major performance wins with objective metrics across load time, bundle size, and interactivity in a large React SPA.
Frontend Web Developer
Rebuilt fleet UI for 15k+ scooters and mapped 1M+ monthly rides with timeline playback and clustering-based telemetry analysis.
React, Next.js, React Native, TypeScript, JavaScript, HTML, CSS
Webpack, CI/CD, Node.js handoff, migrations, AI-assisted delivery
Redux, Redux Thunk, Recoil, Alt.js, MobX, GraphQL, REST, PostgreSQL
Playwright, Jest, Cypress, performance instrumentation, regression prevention
These are tools I built for myself and decided to publish because they can also be useful for other people.
Generate and validate UUIDs for development workflows, including bulk generation.
Decode JWTs, inspect claims, and optionally verify HS256 signatures.
Test regex expressions with match details and live highlighted previews.
Concise, objective, and measurable writing so hiring teams can evaluate quickly.
Clear headings, contrast, keyboard focus states, and semantic layout from the start.
Core Web Vitals mindset: loading, interactivity, and visual stability are part of product quality.
Ready to explore?
Email [email protected] for opportunities, references, or deeper technical discussion.