05/30/2026 updated
100 % available
Mobile Team Lead | Expert in React Native Development
Kathmandu, Nepal
Only remote
Bachelor's Degree in Computer EngineeringAbout me
Mobile Team Lead with 8 years building React Native apps used by millions, expert in performance (Rust/JSI), offline-first apps, and native SDKs; built npm libs, Apple Pay & Stripe integrations, strong in Jest/Detox, CI/CD, and mentorship-driven leadership.
Unit TestingVoIPMobile Application DevelopmentMobile Application SoftwarePayment GatewayE2e TestingWebRTCReact.jsStripeSentryPerformance MonitorReact NativeVideo StreamingFintech
React Native Development
Expert in React Native, TypeScript, and JavaScript with 15+ production-grade apps delivered across iOS and Android, serving millions of users. Strong focus on performance-driven development using JSI, TurboModules, Bridgeless Architecture, and native module optimization. Experienced in building scalable, production-ready apps with clean architecture and maintainable codebases.
Native & Performance Engineering
Deep understanding of React Native internals including JSI, TurboModules, and Codegen. Experienced in integrating Rust with React Native via JSI for CPU-intensive tasks like cryptography and data processing, achieving up to 3x performance improvements over pure JavaScript. Skilled in profiling and eliminating performance bottlenecks across JS and native layers.
Mobile Architecture & System Design
Strong experience designing scalable mobile architectures using modular monorepos, feature-based structure, and domain-driven design. Able to make end-to-end architectural decisions balancing scalability, performance, and long-term maintainability while improving team velocity.
Testing & Quality Engineering
Advocate of TDD and quality-first development. Experienced with Jest, React Native Testing Library, and Detox for unit, integration, and E2E testing. Implemented CI quality gates with 80–90% coverage and automated pipelines for critical flows.
Payment Systems & Fintech
Built secure payment systems using Apple Pay, Stripe, Stripe Terminal, and in-app purchases (StoreKit & Google Play Billing). Delivered fintech systems processing $500K+ transactions with focus on security, compliance, and reliability.
UI Performance & Animation
Expert in Reanimated 3, Gesture Handler, Lottie, Skia, and Animated API. Delivered smooth 60 FPS experiences by moving work to native layers and worklets, eliminating JS thread bottlenecks and optimizing rendering performance.
State Management
Experience with Redux, Redux-Saga, Zustand, React Query, and Context API. Designed scalable state architectures supporting real-time updates, caching, and offline persistence.
API & Real-Time Systems
Integrated REST, GraphQL, WebSockets, gRPC, Firebase, and Supabase. Built resilient networking layers with retries, exponential backoff, caching, and offline recovery strategies.
CI/CD & Mobile DevOps
Built CI/CD pipelines using Fastlane, GitHub Actions, and Xcode Cloud. Implemented CodePush OTA updates and reduced release cycles from ~2 weeks to 2–3 days through automation and optimization.
Emerging Technologies
Experience with WebRTC, BLE, NFC, biometrics, blockchain/Web3, and secure device-level systems. Delivered crypto wallets, telemedicine apps, and NFC-based access systems.
Experience
Professional experience5 - 10 years
Freelancer since2018
Languages
EnglishFluent
Project history
Led a team of 6 mobile developers building a secure enterprise communication platform. Architected React Native and Rust integration via JSI for CPU-intensive cryptographic operations achieving 3x throughput. Designed offline-first architecture using event sourcing and CRDT-based sync. Cut release cycle from 2 weeks to 3 days via Fastlane and GitHub Actions CI/CD. Achieved smooth 60 FPS animations by migrating to Reanimated 3 worklets. Created internal Native SDK (iOS and Android) for secure message encryption packaged as a versioned npm library. Established Jest and Enzyme unit test coverage gates (>=80%) and Detox E2E suites. Mentored 4 junior developers with 2 promoted to mid-level within 12 months.
Built a secure WebRTC video calling app used by 50,000+ users with end-to-end encryption. Replaced legacy video stack with modern React Native solution, reducing call setup latency by 60%. Integrated Stripe SDK and Apple Pay for in-app subscription billing processing $500K+ in transactions. Implemented NFC tap-to-unlock door access via Elocky integration using custom native modules. Built real-time messaging with offline message queue, delivery receipts, and auto-reconnection logic. Wrote comprehensive Jest and Enzyme unit tests and Detox E2E tests covering 85% of user-facing flows.
Built restaurant Point-of-Sale apps with offline transaction support and end-of-day sync. Integrated Stripe Terminal SDK for physical card reader payments at POS. Achieved 92% unit test coverage using Test-Driven Development (Jest and Enzyme). Reduced app launch time by 45% and memory footprint by 30% through profiling and lazy loading. Mentored 3 junior developers on React Native best practices and testing strategies.