Hiflan Haniffa

Led the development using React.js, Node.js, TypeScript, Styled Component, Playwright, and Redux to increase activation and engagement of 30,000 MAU (monthly active users) in Babbel's Live language classes across mobile and web platforms. Boosted Live class bookings by 5% through the successful implementation of Onboarding and Personalised Recommendation features. Migrated state management from Redux to RTK Query, reducing boilerplate code and improving data-fetching speed, cutting page load times. Improved micro frontend performance by migrating from Webpack to Vite, reducing build times and accelerating developer experience. Mentored twojunior engineers through pair programming and code reviews, improving team delivery speed and code quality.

Worked as Senior Software Engineer on delivering new features, including pet care booking, for Care.com's platform serving nearly 4 million users across the US, using React.js, Next.js, Node.js, TypeScript, Material UI, Playwright, React Testing Library and GraphQL.

Improved test coverage from 75% to 90% and drove code quality improvements by reducing TypeScript issues and warnings from 2,500+ to below 100. Contributed to the design system by developing reusable UI components and publishing them through Storybook for consistent documentation and team-wide usage. Led critical live deployments, resolving production issues with <2h turnaround, improving system uptime.

Led frontend development for social media app mesh.life, achieving 500,000+ user sign-ups within 6 months of launch, using React.js, React Native,TypeScript, Redux, React Testing Library, Figma, and Cypress. Delivered a cross-platform mobile app using React Native, accelerating time-to-market and driving user growth from 50,000 to over 100,000 sign-ups. Coordinated an agile team of 6 engineers, delivering major releases on schedule with zero critical bugs. Partnered with stakeholders to shape product direction, turning early concepts into MVP with rapid prototyping.