Backend Engineer ? API & Integrations

Job Description

?? Location: Noida Sector 2, Uttar Pradesh ?? Job Type: Full-Time Job Summary We are hiring a backend engineer with strong expertise in REST API development , backend architecture , and third-party integrations (Meta APIs, Google APIs). You will be responsible for building scalable backend systems, secure authentication flows, and automation workflows. Required Technical Skills Backend Development Strong proficiency in Node.js (Express.js or Nest.js) Expert in REST API design & development Authentication frameworks: JWT, OTP, Access/Refresh Token flows Databases Strong hands-on experience with MongoDB Good understanding of MySQL Ability to design clean & efficient database schemas Third-Party Integrations Meta APIs: Facebook Leads, WhatsApp Cloud API, Messenger Google APIs: OAuth, Calendar, Maps, Business Profile Payment gateways: Razorpay, Stripe, PayPal Experience with webhooks, callbacks & event-driven flows DevOps, Deployment & Tools Familiar with AWS (EC2, S3, RDS basics preferred) Deployment using Nginx, PM2, Vercel, Render Basic understanding of Docker Tools: Git/GitHub, Postman, logging tools (Winston, Morgan) Responsibilities Backend & API Engineering Build and maintain scalable REST APIs Develop backend logic for core modules Implement secure authentication (JWT, OTP, tokens) Optimize performance, caching & error handling Integrations & Automation Manage Meta and Google API integrations Implement payment gateways with webhook flows Build cron jobs, schedulers & automation tasks Create reusable backend services Server Management & Deployment Deploy backend on AWS / Nginx / PM2 Monitor server uptime, logs & errors Prepare API documentation (Postman / Swagger) Cross-Team Collaboration Work closely with frontend developers for API integration Coordinate with QA for testing & debugging Quickly resolve production issues Candidate Requirements Strong problem-solving & logic-building skills Ability to work independently and take ownership Comfortable managing backend modules end-to-end Proactive and responsible attitude Preferred (Not Mandatory) Redis, queues (BullMQ, RabbitMQ) Microservices architecture CI/CD pipelines How to Apply Send your CV , GitHub , and project links to: ?? [email protected]