Piyush Kumar Gaur

Frontend Developer

ArgosMob

Jul 2023 - Present

Built and maintained production MERN-stack web and mobile applications across healthcare, fintech, travel, and social media platforms, collaborating with backend, design, and QA teams in Agile sprints. Architected and developed Medi-Link, a US-based healthcare platform (React Native, Node.js, MongoDB) connecting patients with specialists, featuring real-time appointment scheduling, telemedicine, and secure WebSocket-based messaging. Built BeingPetz, a social media platform with image upload, feed management, and user interaction features, achieving a 95% crash-free rate through comprehensive testing. Developed misa, a fintech platform for tax filing and expense tracking, building RESTful APIs (Node.js/Express) that handle 10,000+ daily transactions at 99.9% uptime with encrypted data handling. Engineered BusOkay, a school transportation tracking system with real-time GPS integration (Google Maps API), MongoDB-backed attendance management, and parent notification features. Scaled mobile applications to 50,000+ users using React Native, Redux, and Context API for predictable state management across products. Reduced initial load time by 40% through code splitting, lazy loading, and efficient state management patterns; cut development time by 30% by building a shared, reusable component library. Conducted beta testing and QA, identifying and resolving 100+ bugs prior to production releases, and mentored junior developers on React best practices and modern JavaScript workflows.