Stay connected worldwide with Raza – enjoy affordable international calls, instant mobile top-ups, and free Raza-to-Raza voice/video calls.
Raza is your one-stop solution for high-quality, low-cost international communication. Call over 200 countries with crystal-clear voice and video using mobile minutes, Wi-Fi, or data. Whether you’re reaching out to family in India, friends in the UK, or colleagues in Nigeria, Raza delivers unbeatable clarity and unbeatable rates—starting from just 1¢ per minute.
Building a high-quality, low-latency international calling system while keeping infrastructure costs low. Integrating secure and fast mobile top-up APIs for over 200 countries, and ensuring seamless user experience on both iOS and Android under varying network conditions.
Designed and developed a scalable backend using Node.js and MongoDB to handle high volumes of international calls and top-ups. Integrated Twilio for voice/video calling and Reloadly API for mobile recharge. Implemented auto-refill functionality, Firebase Cloud Messaging for notifications, and optimized performance across mobile platforms using Flutter. Ensured strong data validation and secure payment processing with Stripe.
Successfully launched the app with over 100,000 downloads within the first few months. Achieved a 99.9% call connection rate and 4.8+ star rating on both iOS and Android stores. Users reported over 30% savings on international calls, and mobile top-up transactions grew by 50% month-over-month.
10 months
Full Stack Developer – Led the development of real-time calling features, top-up integration, and auto-refill logic across backend and mobile platforms.
Raza's team was impressed by the seamless call quality, top-up speed, and user-friendly interface. They praised the consistent delivery throughout the project and the adaptability to real-time feedback.