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directtosumit

Sumit Garai

@directtosumit

Mobile and Web Developer React Native Expo Nodejs Firebase

India
Inglese, Bengali, Hindi
Alcune informazioni sono riportate in lingua inglese.
Chi sono
I'm a Full-Stack Mobile & Web Developer with 7 years of professional experience building and maintaining production applications. I specialize in React Native, Expo, React Native Web, TypeScript, JavaScript, Node.js, Firebase, and GCP. My experience includes Firebase Cloud Functions, Firestore, Authentication, REST APIs, Docker, Android/Java, and Python. I can take your product from idea to production or help fix, improve, and maintain an existing application.... Continua a leggere

Competenze

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directtosumit
Sumit Garai
offline • 
Tempo di risposta medio: 1 ora

Consulta i miei servizi

Sviluppo multipiattaforma
I will develop mobile apps from scratch using react native and expo
A partire da125 USD / progettoMaggiori dettagli
Sviluppo multipiattaforma
I will convert ai prototypes into production ready react native mobile apps
A partire da125 USD / progettoMaggiori dettagli

Portfolio

Esperienza lavorativa

Unknown_Group

Full-Stack Mobile & Web | React Native, Expo, Node.js & Firebase

Unknown Group • Full time

Aug 2019 - Jul 2026 • 6 yrs 11 mos

●​ Universal Product Architecture: Spearheaded full-lifecycle software development, maintaining single-repository React Native codebases that simultaneously drive high-performance iOS/Android mobile apps and administrative web dashboards, reducing cross-platform feature divergence by 50%. ●​ Serverless Backend Infrastructure: Designed and deployed scalable Node.js serverless architectures using Firebase Cloud Functions, managing heavy database operations, cloud storage pipelines, real-time data streaming, and push notification triggers. ●​ Enterprise Multi-Tenancy & Access Security: Formulated granular, role-based authorization rules (RBAC) across complex multi-tier stakeholder systems (Admins, Organizations, Doctors, Service Providers, and End-Users) to enforce strict, multi-tenant data isolation. ●​ IoT & Hardware Integration Engineering: Built low-level hardware interface layers using serial, USB, and Bluetooth communication protocols to process raw inbound data packets into real-time UI data mapping with sub-millisecond latency. For the past 7 years at Aradha Tech Services, I have owned the full software development lifecycle—architecting backend databases, engineering cross-platform mobile and web applications with React Native and Expo, and deploying scalable Node.js serverless backends on Firebase and GCP. Core Technical Stack: Frontend & Mobile: React Native, Expo, React Native Web, TypeScript, JavaScript Backend & Cloud: Node.js, Firebase (Cloud Functions, Firestore, Auth), GCP VMs, REST APIs, Docker Native & IoT: Java (Android Studio), Python, Git I specialize in taking product ideas from initial concept to production-ready web and mobile ecosystems. I am highly adaptable and always eager to master new technologies, frameworks, or tools to meet team objectives. GitHub: https://github.com/directtosumit/ Docs: https://drive.google.com/drive/u/0/mobile/folders/1MJBkfiC7q3G9n-vg3g9mw9YyXnVP3G2o LinkedIn: https://www.linkedin.com/in/sumit-garai-b056b3420