Backend Developer

4 weeks ago

Goa, India Whatjobs IN C2 Full time

We are seeking a skilled Backend Developer to take full ownership of designing and managing the backend architecture for a scalable web/mobile application. This role demands expertise with Node.Js, Firebase, and MongoDB, and focuses on building reliable, high-performance backend solutions for user-centric products. Responsibilities: Own the entire backend architecture for a scalable app, from planning to deployment. Develop user authentication and authorization (JWT, OTP-based login, session management). Implement logic, user discovery algorithms, preference-based filters. Build chat and messaging system with Firebase for real-time messaging, delivery/read receipts. Integrate Firebase Cloud Messaging (FCM) for push notifications (iOS + Android). Design and manage MongoDB schema optimized for high-performance matchmaking and chat use cases. Ensure secure, tokenized API access using industry best practices ( HTTPS, role-based access). Handle media uploads (e.G., user profile images, chat media) securely via cloud storage (e.G., Firebase, AWS S3). Implement analytics hooks for key user actions and behavior tracking (events, funnels). Build admin APIs for user moderation, reporting, and flagging systems. Monitor and maintain API performance, database health, error logs, and uptime metrics. Collaborate with DevOps to set up CI/CD, monitoring, and auto-scaling backend infrastructure (e.G., Docker, PM2, or cloud functions). Manage environment configurations (dev/staging/production) securely with secrets handling. Build fallback systems to gracefully handle network failure, retries, message queueing if needed. Write clean, modular, and testable code with unit/integration tests for critical backend logic. Communicate and document API contracts clearly for frontend consumption (Postman). Preferred Qualifications: 3+ years’ experience in backend development with Node.Js, Firebase, and MongoDB. Strong understanding of token-based authentication and security practices. Experience building scalable, real-time chat or messaging systems. Familiarity with cloud storage and services (Firebase, AWS S3). Solid knowledge of CI/CD, monitoring, and application scaling. Clear communication skills for technical documentation and cross-functional collaboration.

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