Developed Pijar Sekolah application series serving 500,000+ users including students, teachers, stakeholders, ops teams, and government by converting 100+ Figma designs into pixel-perfect, responsive interfaces using React.js and Tailwind CSS.
Integrated 100+ APIs across 10+ projects using REST API, ensured 80%+ unit test coverage with Jest, Enzyme, and React Testing Library, reduced critical errors by 30% with ESLint & SonarQube, and optimized performance with Webpack and Lottie animations.
Led a 1 to 5-person Front-End team, conducted code reviews, mentored new joiners, collaborated with the development team, built reusable components, implemented unit testing and API integration, and deployed features to staging & production using CI/CD pipelines for smooth and timely releases.