Swayam Satyabrat Das

React Native Developer with 2.10+ years shipping production-grade, cross-platform mobile apps for BFSI, healthcare, edu-tech and travel-tech. Hands-on across the full mobile lifecycle — native modules, Firebase App Distribution, push notifications (FCM), background geo-location tracking, maps, offline-first architecture, secure network communication, and automated testing with Jest and Detox. Experienced shipping published Play Store apps end-to-end.

Software Engineer – Banking Domain (Mobile & Web) at Winjit Technologies Pvt. Ltd. (Employed through Myndgate) (2026-04 – Present)

• Developed secure and scalable banking & financial mobile applications, ensuring high performance and regulatory compliance.
• Participated in requirement analysis, design, development, testing, and deployment of enterprise banking applications following Agile methodologies, collaborating cross-functionally to maintain code quality and reliability.

React Native Developer / Full Stack Engineer at Operations Via India (opvia.in) (2025-04 – 2026-03)

• Developed and deployed 3+ production-grade React Native applications, owning features end-to-end from native module integration through Play Store release.
• Implemented business-critical mobile features including Stripe payment gateway, Firebase push notifications (FCM), geo-location services, real-time booking modules, and secure authentication (JWT, RBAC).
• Used Firebase App Distribution to ship beta builds for QA and stakeholder review before Play Store submission.
• Wrote unit tests (Jest) and end-to-end tests (Detox) to catch regressions across booking and payment flows.
• Built and optimized RESTful APIs consumed by the mobile app, improving response time and production availability.
• Gathered requirements daily with international stakeholders (India & US) and architected end-to-end mobile system design.

React Native Developer (Application Developer) at Clino Health Innovation Private Limited (2023-11 – 2025-04)

• Designed and developed two MO Ambulance React Native apps: a B2B fleet operations platform (published on the Play Store) and a B2C emergency ambulance booking app.
• Built background geo-location tracking for real-time ambulance monitoring even when backgrounded, integrated with maps to plot live routes and ETAs for dispatch.
• Implemented push notifications (FCM) and socket-based real-time monitoring to keep dispatchers and drivers in sync during active bookings.
• Secured data transmission over cellular and WiFi networks for location and booking data, applying network security practices for sensitive healthcare data.
• Developed and optimized a fully responsive React Native app for tablets and phones with consistent cross-device performance.
• Created reusable, performance-optimized components, including a custom date and time picker, for scalability across app modules.

B.Tech in Computer Science – Synergy Institute of Engineering & Technology