Mobile App at Arc Timer

Launched Arc Timer, a cross-platform React Native workout application for iOS and Android, developed end-to-end from concept through App Store and Google Play release. Built using React Native, Expo Router, and TypeScript with a single codebase. Implemented state-based workout execution and UI-thread animations using React Reanimated. Owned the full product lifecycle from feature planning to store release, validating database services with Jest to ensure reliable application behavior.

Portfolio Web at filipemendes.dev

Launched filipemendes.dev, a Next.js portfolio showcasing projects, technical documentation, and a developer profile. Built with Next.js, App Router, React Server Components, and TypeScript to deliver server-rendered pages across the application. Implemented responsive interfaces using CSS Modules and Framer Motion for smooth page transitions and interactive user experience. Managed production deployment with Vercel, configuring custom domain, DNS records, and professional webmail for complete production setup.

Frontend Engineer at ACIN group

Modernized a healthcare management platform used by 10k+ users by building React and TypeScript interfaces with GraphQL APIs. Implemented dashboard, patient management, and prescription workflow UI, including authentication, form submissions, and paginated data views. Delivered responsive and accessible interfaces using semantic HTML and adaptive CSS so the application works across desktop and mobile. Collaborated with backend engineers, designers, and QA to refine GraphQL schemas, build reusable React components, and iterate based on feedback, improving UI consistency and development efficiency. Leveraged AI-assisted development with Cursor and GitHub Copilot to accelerate feature implementation, code reviews, and frontend workflows.

Mobile Engineer at Nearsoft

Developed cross-platform mobile banking applications using React Native and TypeScript for Caixa Angola and Kene. Implemented account management, transfers, payments, and debit card features integrating REST APIs for authentication, transactions, and error handling. Built reusable React Native components and managed application state with Redux to improve UI consistency and simplify data flow. Worked with designers in Figma to translate designs into responsive mobile interfaces with consistent user experience across iOS and Android. Onboarded and mentored frontend interns, introducing Git-based version control workflows and supporting daily feature development. Prepared production builds and contributed to App Store and Google Play releases and submissions.