I’m Suraj Kumar, a full stack and mobile app developer based in Delhi, India.
I’m Suraj Kumar, a full stack and mobile app developer based in Delhi, India. I specialize in building modern, responsive web applications and Android/mobile solutions, with a focus on clean implementation, reliable performance, and clear communication.
I enjoy turning business ideas into practical digital products end-to-end—covering frontend and backend development, API integration, database-driven features, and app workflows. I also work with Firebase and other cloud services to deliver secure authentication, real-time experiences, and smooth user interfaces, whether it’s chat, dashboards, or custom service platforms.
Built Fit India Gym OS (fitindia90.netlify.app + fitindiacos.netlify.app) - 127 Daily Check-ins, 32 Red List Recovery, ₹42k Store Upsell. I build same for your gym in 10k - Website + Owner App + Member App with QR, Streak, Renewal. gym management system, gym app, gym website, member retention, qr checkin, gym software, fitness app, gym owner dashboard
JanVani – Real-Time Chat & Calling App JanVani is a modern Android communication app designed for real-time messaging and calling. Key Features Real-time one-to-one messaging Firebase Authentication Firebase Firestore integration User profiles and chat management Audio and video calling Agora integration for real-time communication Push notifications Responsive Android user interface Real-time data synchronization My Role I worked on the Android application development, Firebase backend integration, authentication, database integration and real-time communication features. Technologies Used Java Android Studio Firebase Authentication Firebase Firestore Firebase Cloud Messaging Agora REST APIs The project demonstrates my experience in Android development, real-time applications, cloud backend integration and third-party API integration.
I work as a freelance Full Stack and Mobile App Developer, building websites, web applications, APIs and Android applications for clients and personal projects. My experience includes React.js, Next.js, JavaScript, TypeScript, Node.js, Express.js, PHP, Laravel, WordPress, WooCommerce, MongoDB, MySQL, Firebase, Android development with Java and Kotlin, and Flutter. I develop responsive user interfaces, backend APIs, database integrations, authentication systems, real-time features, third-party API integrations and custom business solutions. I work directly with clients to understand requirements, develop solutions, fix technical issues and deliver reliable, user-friendly products.
Completed a Master of Computer Applications (MCA) with a focus on software development, web and mobile application development, programming, databases, backend technologies and modern IT solutions. Developed practical knowledge through software projects and hands-on development work.
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