Sam

Hybrid Mobile App Developer (WebView, React Native & Node.js)

Fintech • Freelance

Sep 2025 - Mar 2026 • 6 mos

Specialized in developing hybrid and cross-platform mobile applications that bridge native functionality with web-based content using React Native WebView, Flutter WebView, and native Android/iOS WebView components. Built seamless JavaScript-to-native communication bridges enabling embedded web apps, CMS platforms, e commerce storefronts, and third party portals to function like fully native mobile experiences, complete with push notifications, deep linking, offline fallback pages, and native navigation controls. Developed backend infrastructure using Node.js, Express.js, and both Firebase (Firestore, Authentication, Cloud Messaging, Cloud Functions) and Supabase (PostgreSQL, Auth, Storage, Edge Functions) depending on project requirements, enabling flexible backend-as-a-service architecture. Implemented secure authentication flows including JWT-based sessions, OAuth2, social login, and biometric verification shared seamlessly between web and native layers. Optimized WebView performance through caching strategies, lazy resource loading, and minimizing bridge call overhead to reduce latency and improve responsiveness. Built custom native modules for camera access, file uploads, geolocation, and payment SDK integration (Stripe, PayPal, Razorpay) that WebView content could trigger through JavaScript interfaces. Experienced in converting existing responsive web applications into fully functional mobile apps with minimal rework, significantly reducing development time and cost for clients. Managed app store submission processes for both Google Play and Apple App Store, ensuring compliance with WebView-related review guidelines. Collaborated closely with backend and frontend web teams to maintain consistency across web and mobile platforms, and provided ongoing maintenance, bug fixes, and feature updates post launch.

Mobile app development (Android & iOS)

Medical Cannabis Shop

Apr 2025 - Aug 2025 • 4 mos

I am a professional Mobile App Developer with strong expertise in app development, mobile app creation, and delivering high-performance digital products for clients worldwide. I specialize in building scalable and user-friendly mobile app solutions using Flutter and React Native, focusing on both Android app development and iOS app development. Over the years, I have worked as a Flutter developer and mobile app developer, building custom solutions ranging from simple app builder projects to advanced AI-powered mobile app systems. My experience includes full-cycle app creation, UI/UX implementation, backend integration, debugging, and performance optimization. I have successfully developed and improved multiple Android apps and iOS apps, ensuring smooth functionality, fast performance, and modern design standards. I also handle app development projects involving Flutter app development, React Native app development, and hybrid mobile app systems. My core expertise includes: Mobile app development (Android & iOS) Flutter app development and Flutter-based UI systems React Native app development for cross-platform apps Bug fixing and optimization for existing mobile apps Building mobile app solutions from scratch AI app developer solutions for smart applications App creation, deployment, and publishing support I am highly experienced in turning ideas into fully functional mobile apps, whether it is a startup MVP, business application, or advanced AI-powered system. I focus on delivering clean code, scalable architecture, and user-friendly mobile app experiences. My goal is to provide high-quality app developer services that help clients launch successful mobile app products in competitive markets, including Android development, iOS app development, and cross-platform Flutter & React Native solutions.

Senior Mobile App Developer (React Native & Flutter)

Grace3 Technologies

Aug 2024 - Apr 2025 • 8 mos

Experienced Mobile App Developer specializing in cross-platform application development using React Native, Flutter, and native Android/iOS technologies. Delivered 15+ scalable mobile applications for startups and enterprise clients across e-commerce, healthcare, fintech, real estate, and on-demand service industries. Proficient in building robust backend architecture using Node.js, Express.js, and RESTful APIs, with strong hands-on experience integrating Firebase (Authentication, Firestore, Realtime Database, Cloud Functions, Cloud Messaging, Analytics, Crashlytics) and Supabase (PostgreSQL, Auth, Storage, Edge Functions, Row-Level Security) as backend-as-a-service solutions. Skilled in implementing WebView-based hybrid app architecture to embed existing web platforms, CMS content, and third-party portals within native mobile shells, including deep linking, push notifications, and offline caching. Strong command of state management libraries including Redux, Redux Toolkit, Zustand, Context API, Riverpod, BLoC, and Provider. Experienced with payment gateway integration (Stripe, PayPal, Razorpay), Google Maps/geolocation services, socket-based real-time chat, in-app purchases, and biometric authentication. Well-versed in Git version control, CI/CD pipelines (Fastlane, GitHub Actions, Bitrise), automated testing (Jest, Detox), and App Store/Google Play deployment including compliance, metadata optimization, and release management. Focused on writing clean, maintainable, well-documented code, optimizing app performance, reducing load times, and delivering pixel-perfect UI/UX aligned with Figma/Adobe XD designs. Comfortable working in Agile/Scrum environments, communicating directly with clients and stakeholders, and managing full project lifecycles from requirement gathering to post-launch support and maintenance.