Back End Developer

Job Description

Back-end developer Lead the server-side development that powers our web, iOS, and Android apps. You will design secure, scalable APIs, manage data, integrate payments, and support real-time features across e-commerce, social, trivia/gaming, and AI-driven products. Key Responsibilities API & Microservice Development Build and maintain REST (and optional GraphQL) endpoints in Node.js (Express or NestJS). Write Firebase Cloud Functions for real-time logic when appropriate. Data & Security Design schemas in Firestore / SQL / NoSQL as required. Implement authentication, authorization, and role-based access. Ensure data privacy, rate limiting, and secure payment handling. Payment & External Integrations Integrate payment gateways for one-time, subscription, and coupon flows. Connect to third-party AI services (chat, vision, etc.) and other external APIs. Deployment & Monitoring Automate CI/CD, use Docker or cloud builds, deploy to Firebase, GCP, AWS, or comparable. Set up logging, alerting, and performance monitoring. Collaboration & Release Support Work closely with React and Flutter engineers to define contracts and return structures. Participate in app release cycles, ensuring backend readiness and versioning. Organise tasks and documentation in Notion ; attend stand-ups and code reviews. Required Skills & Experience 5+ years building production back-end systems with Node.js . Solid experience with Firebase (Auth, Firestore, Cloud Functions) or equivalent serverless stacks. Strong database design skills (document, relational, and caching strategies). Proven payment-integration experience (checkout, subscriptions, refunds). Deep understanding of RESTful principles, web security, and scalability patterns. Experience deploying and operating services in a public cloud environment. Familiar with CI/CD pipelines, Git workflows, and automated testing. Fluent English communication; comfortable documenting in Notion and explaining architecture to the team.