Founder & Full-Stack Developer at Nixi Web Lab

Architected and deployed production-ready applications with React, Next.js 14+ and TypeScript, achieving Lighthouse scores of 99/100 and fast load times. Designed RESTful APIs with Node.js/Express and secure JWT authentication. Built bilingual EN/ES applications with i18next, deployed on Vercel with automated CI/CD pipelines. Integrated Stripe and Cloudinary with comprehensive error handling. Applied WCAG accessibility standards and responsive design patterns (CSS Grid, Flexbox). Led end-to-end development and collaborated with cross-functional, international teams; notable live projects include Fields Barber and El Higo.

Frontend Developer at ResMed

Contributed to the NightOwl healthcare platform serving 20,000+ weekly users across 3 markets using React 18, TypeScript, and Node.js. Increased test coverage from 2% to 35% in 5 days, authoring 1,000+ unit tests with Jest and React Testing Library; introduced end-to-end testing with Playwright. Implemented state management with Context API and token-based authentication; collaborated with international teams across 4 time zones and translated Figma designs into accessible features. Served as rotating Scrum Master and led 3 production releases, conducting code reviews and ensuring cross-browser compatibility.

Teaching Assistant & Full Stack Developer at 4Geeks Academy

Mentored 50+ students in React 18, TypeScript, Node.js, and Python; delivered technical lectures on React Hooks, component architecture, API integration, and testing methodologies. Created educational repositories and deployed responsive React + Bootstrap projects. Guided students through Git workflows, PR reviews, and agile development practices; conducted pair programming sessions to debug issues and teach problem-solving strategies.

Full Stack Developer Intern at Yumly

Developed full-stack features using Elixir/Phoenix backend and Phoenix LiveView; built responsive UI components with Tailwind CSS ensuring mobile-first design; optimized PostgreSQL queries and application performance, reducing response times by 25%. Collaborated with backend to integrate RESTful APIs and implement real-time features.

Research Fellow at UNDP (United Nations Development Programme)

Managed cross-cultural international team of 8 for GEF-funded sustainable development project; led environmental conservation initiatives aligned with SDGs (climate action, biodiversity, sustainable development). Coordinated with stakeholders across 5 countries, demonstrating adaptability in a Portuguese-speaking environment.

Full-Stack Lead Developer at EquiRoster

Architected a complete application from concept to deployment: React/TypeScript frontend, Python/Flask + PostgreSQL backend. Led product design and UX research with 10+ user interviews to validate product-market fit; designed system architecture, database schemas, and API contracts; implemented complex state management and data visualization; developed Jest unit tests with 85%+ coverage; built dashboards with Chart.js and CSS Grid; followed API-first development with OpenAPI specifications.

Frontend Developer at Yo Lo Cuido

Developed responsive UI with React using a component-based architecture and reusable patterns; ensured cross-browser compatibility; collaborated with backend to integrate Node.js/MongoDB RESTful APIs; implemented form validation with React Hook Form and client-side routing.

Full-Stack Developer at Liquiboxes

Architected an e-commerce platform: React frontend, Node.js/Express backend, PostgreSQL; developed a reusable component library with responsive design across 20+ pages; integrated Stripe for payments and Cloudinary for media management; implemented Jest unit tests and React Testing Library integration tests; led agile development with code reviews and design critiques.