Pappu Kumar

Background

About Pappu Kumar

I’m a mobile app developer and fintech product engineer with a proven track record of delivering scalable, high-performance mobile and web applications. With expertise in React Native, Node.js, Spring Boot, and Next.js, I specialize in building fintech solutions that make financial services more accessible and user-friendly. Currently, I work as a senior mobile app engineer at Sensegrass, where I’ve led the development of key fintech products, including loan management systems, investment platforms, and real-time payment gateways. My work has improved app performance, reduced loan approval time by 30%, and significantly enhanced user engagement. Beyond mobile app development, I have extensive experience in backend architecture and microservices using Node.js, Express, and MongoDB, ensuring seamless communication between services and scalable deployments. I’m also passionate about building SEO-optimized web apps with Next.js and integrating Google Analytics for performance improvements. Key areas of expertise- Mobile app development: Proficient in React Native, Redux Toolkit, and Expo SDK, building apps with features like real-time notifications, QR code payments, and loan calculators- Fintech solutions: Experienced in payment gateway integration, loan management, and investment platforms for mutual funds, SIPs, and gold loans- Backend development: Skilled in designing REST APIs, microservices, and secure authentication systems using Node.js, Spring Boot, PostgreSQL, and MongoDB- Microservices architecture: Designed scalable microservices with API Gateway and independent services for user management, property management, and notifications- SEO-optimized web development: Developed Next.js applications with a focus on SEO best practices, Google Analytics integration, and performance improvements to drive organic traffic. I’m always exploring new technologies and recently delved into AI/ML, Python automation with Selenium, and OpenCV to build smarter solutions.