Senior Full Stack Web Developer

We're Hiring: Senior Full Stack Web Developer (Next.js \+ NestJS) About the Role One21 Communications Private Limited is building a next\-generation B2B/B2C Fintech Platform focused on Recharge Services, BBPS Bill Payments, Wallet Solutions, UPI Collections \& Payouts, and Travel Booking Services. We are looking for an experienced Senior Full Stack Web Developer who can lead the development of scalable, secure, and high\-performance web applications using modern technologies. Position Senior Full Stack Web Developer Employment Type Full\-Time (On\-Site) Location 321, Antilia Business Hub, Near Nana Chiloda, Nana Chiloda, Ahmedabad – 382330 Technology Stack Next.js React.js TypeScript NestJS Node.js PostgreSQL Redis AWS Docker Key Responsibilities Design and develop scalable web applications using Next.js and NestJS. Build Customer, Retailer, Distributor, and Admin Portals. Integrate Payment Gateway, UPI, BBPS, Recharge, and Travel APIs. Develop Wallet Management, Transaction Management, and Reconciliation Systems. Implement secure authentication, authorization, and role\-based access controls. Ensure application performance, reliability, security, and scalability. Collaborate with product and business teams to deliver robust fintech solutions. Required Skills \& Experience 5\+ years of Full Stack Development experience. Strong expertise in Next.js, React.js, TypeScript, and NestJS. Hands\-on experience with PostgreSQL and REST API development. Experience integrating Payment Gateways and third\-party APIs. Knowledge of AWS deployment and DevOps practices. Strong understanding of secure coding practices and scalable architecture. Prior experience in Fintech, Recharge, BBPS, Wallet, or Payment platforms is highly preferred. Preferred Qualifications Experience with UPI Collect and UPI Payout integrations. Experience implementing BBPS solutions. Knowledge of Wallet, Ledger, and Reconciliation systems. Experience with Redis, Queues, and Microservices Architecture. Familiarity with high\-volume transaction processing systems. What You Will Build Customer Portal Retailer \& Distributor Portal Admin Dashboard Wallet Management System Transaction Management System (TMS) Transaction Reconciliation System (TRS) Recharge \& Bill Payment Platform Travel Booking Platform Integration How to Apply One21 Communications Private Limited Email: **one21communication@gmail.com** Phone: 8866223268 Qualified candidates with relevant fintech development experience are encouraged to apply. Pay: From ₹40,000\.00 per month Work Location: In person Note: This is a third party job (Aggregated by careeruplift.ai). Shortlisting and Final hiring decision & process is handled by the company.