Mobile App Developer (iOS & Android) – Real-Time / Low Latency Focus

About the Project We are building a competitive, reaction-based mobile platform. The app requires: • Real-time responsiveness • Precise input timing • Smooth animations • Consistent performance across devices • High concurrency backend integration This is not a standard content or e-commerce app. Performance and latency matter. Role Overview We are looking for a strong mobile engineer who can: • Build and maintain both iOS and Android apps single-handedly • Architect clean, scalable mobile codebases • Optimize for low latency and high frame-rate interactions • Integrate real-time APIs (WebSockets / streaming events) • Ship production-ready builds to App Store & Play Store You will be responsible for owning the entire mobile layer. Preferred Tech Stack • React Native or Flutter (strongly preferred) • Native experience (Swift / Kotlin) is a bonus • WebSocket / real-time communication handling • REST API integration • Performance profiling tools Core Requirements • 4+ years of mobile development experience • At least 2 production apps shipped (must provide links) • Strong understanding of: • Event loops • Rendering cycles • Animation performance • Frame rate optimization • Memory management • Experience handling: • Low-latency inputs • Real-time data synchronization • Device performance variability What We Care About • You understand that 50ms matters. • You know how to reduce frame drops. • You can explain how you’d measure latency in an app. • You can optimize animation and touch responsiveness. • You think like a product engineer, not just a feature implementer. Responsibilities • Architect and build the mobile application • Implement real-time interaction systems • Optimize UI for responsiveness and performance • Integrate with Node.js backend APIs • Manage App Store & Play Store deployments • Ensure scalability and stability Nice to Have • Gaming or interactive UI experience • Experience with leaderboards or competitive systems • Experience building apps with high DAU • CI/CD setup for mobile builds Job Type: Freelance Contract length: 12 months Pay: ₹700.00 - ₹1,100.00 per hour Expected hours: 5 – 10 per week Work Location: Remote