Job Title Senior Mobile App Developer (Messaging + Payments+Referral/reward system) – 1 Month Contract Job Description We are looking for an experienced Mobile App Developer to work with our team for 1 month on a consumer-facing messaging and payments based application. The developer will be responsible for improving existing features, implementing new capabilities, and ensuring the system performs reliably at scale. This role requires strong experience in real-time messaging systems, secure payment integrations, referral program setup and high-quality UI/UX implementation. Key Responsibilities Work on a real-time messaging platform including features like: 1:1 chat group chat media/file sharing audio/video calling Group audio/video calls Call handling (Busy, disconnected, on whatsapp/cellular call) Implement clean, responsive UI/UX based on provided designs. Optimize app performance and ensure scalability for high user traffic. Collaborate with product and backend teams to ship features quickly. Use AI-assisted development tools to improve productivity and code quality. Maintain high-quality, maintainable, and scalable code. Required Skills Strong experience in mobile app development (Android / iOS). Proven experience building real-time messaging systems. Strong understanding of scalable architecture and performance optimization. Experience implementing pixel-perfect UI/UX designs. Familiarity with AI-assisted coding tools (e.g., GitHub Copilot, ChatGPT, Cursor, etc.). Good knowledge of API integrations and backend communication. Preferred Experience Experience working on chat, social, or super apps. Experience building apps that have scaled to large user bases. Experience with WebRTC, socket-based messaging, or real-time communication frameworks. Prior work on consumer-facing mobile apps. Contract Details Duration: 1 months Engagement: Full-time / Dedicated Start: Immediate or within 1 week Application Requirements Please include: Links to apps you have built (especially messaging or payments apps) Description of real-time systems you have worked on Examples where your app scaled to a large number of users Technologies and frameworks you are most comfortable with