Backend Developer – Node.js / NestJS (Gurugram)

We’re Hiring: Backend Developer – Node.js / NestJS Company: NuSwipe Technology Pvt. Ltd. Employment Type: Full-Time Work Mode: On-site Location: Aerocity, New Delhi / Gurugram Candidates may choose either office location based on their convenience. Experience Required: 3-4 Years About NuSwipe NuSwipe Technology Pvt. Ltd. is a technology-driven company operating across digital gift cards, corporate rewards, loyalty, incentives and corporate gifting solutions. We are building scalable B2B and consumer-facing technology platforms to support digital rewards, transactions, integrations and corporate engagement programs. About the Role: We are looking for an experienced Backend Developer with strong hands-on expertise in Node.js, NestJS, TypeScript, PostgreSQL and REST APIs. The ideal candidate should have experience building secure, scalable and transaction-intensive backend systems and be comfortable working with third-party APIs, databases, payments and production environments. You will work closely with our Technical Lead / Full Stack Architect, frontend and mobile development teams. Key Responsibilities: - Develop and maintain backend applications using Node.js, NestJS and TypeScript - Build scalable and secure REST APIs - Integrate third-party APIs, webhooks and external services - Work extensively with PostgreSQL, including schema design, queries, indexing and optimisation - Build reliable order, payment and transaction workflows - Implement authentication, authorization and RBAC - Handle retries, timeouts, idempotency and duplicate transaction scenarios - Use Redis for caching and background-processing requirements - Write clean, reusable and production-ready code - Participate in code reviews, debugging and performance optimisation - Collaborate with React/Next.js and Flutter developers - Maintain API documentation using Swagger/OpenAPI - Troubleshoot staging and production issues Required Skills: - Node.js – Minimum 3+ years of strong hands-on experience preferred - NestJS & TypeScript - Express.js - PostgreSQL / SQL - Strong understanding of database design, relationships, transactions, indexing and query optimisation - REST APIs & third-party API integrations - Webhooks and API failure handling - JWT / Authentication / Authorization / RBAC - Redis / Caching - Git & collaborative development workflows - Unit and integration testing - Strong debugging and problem-solving skills Positive to Have : AWS / Cloud, Docker, BullMQ / RabbitMQ / AWS SQS, Payment Gateway Integrations, CI/CD, Microservices / Event-Driven Architecture, Logging & monitoring tools Preferred Industry Experience: Candidates with experience in FinTech, Digital Gift Cards / Vouchers, Payments, Digital Wallets, Rewards & Loyalty, E-commerce or transaction-heavy platforms will be highly preferred. Experience with voucher APIs, payment systems, reconciliation or high-volume third-party integrations will be an added advantage. What We’re Looking For Someone who is genuinely hands-on, understands backend systems beyond basic CRUD APIs, can independently own assigned modules, thinks carefully about transaction reliability and data consistency, and can work effectively under the guidance of a Technical Lead / Architect. 📍 Aerocity, New Delhi / Gurugram