Tech Lead / Solution Architect

Company Overview NuMosaic is a leading provider of digital innovation services, specialising in digital transformation, cloud integration, strategic staffing solutions, and enterprise technology services. We help businesses accelerate growth through scalable and future-ready technology solutions. Role Description We are seeking an experienced and hands-on Tech Lead / Solution Architect to lead the development of a greenfield Payment Aggregator / Payments Gateway platform for the Indian market.

This role requires strong expertise in Node.js, AWS cloud-native architecture, distributed systems, and payment platforms. The ideal candidate will drive architecture decisions, establish AWS infrastructure foundations, mentor engineering teams, and ensure delivery of secure, scalable, and operationally resilient systems. This is a senior technical leadership role suited for professionals passionate about building high-integrity transaction systems and leading engineering excellence.

Position Title Tech Lead / Solution Architect Experience Required 8+ years overall software engineering experience 3+ years in Tech Lead / Solution Architect roles Strong hands-on Node.js and AWS experience Location INDIA (DELHI / NCR) Employment Type Full-time Key ResponsibilitiesArchitecture & Solution Design Lead end-to-end solution architecture and technical design Define scalable microservices architecture and API standards Ensure compliance with key non-functional requirements: Payments Platform Leadership Provide technical leadership across payment gateway and payment aggregator systems Drive implementation of: UPI integrations Settlement & reconciliation flows Refunds & chargebacks Payment routing AWS Cloud Foundation Design and implement AWS infrastructure and deployment architecture Work extensively with: ECS Fargate Lambda SQS FIFO + DLQ Aurora PostgreSQL Establish CI/CD pipelines and secure deployment practices Engineering Leadership Lead backend and frontend engineering teams Conduct architecture reviews and code reviews Define engineering standards and quality gates Mentor developers and drive engineering best practices Technical Skills RequiredCore Skills Strong Node.js and TypeScript expertise Experience with scalable backend systems and REST APIs Microservices and event-driven architecture experience PostgreSQL / relational database expertise CI/CD and DevOps experience AWS cloud-native architecture experience Docker and container orchestration Infrastructure security and observability Preferred Experience Fintech / banking / payment gateway domain experience UPI / PSP / payout systems exposure High-throughput transaction systems Compliance-focused environments How to Apply Interested candidates should send their resume and relevant project experience to or apply using this job post