Senior Full Stack Engineer at Cigna Healthcare

Designed and built scalable full stack applications using Node.js, NestJS, React, Next.js, TypeScript, and Python for enterprise SaaS and customer-facing platforms. Led backend architecture for high-volume applications including REST APIs, GraphQL services, microservices, background workers, and event-driven workflows. Built secure and maintainable API layers with authentication/authorization, reporting, and third-party integrations (payments, messaging, and enterprise APIs). Created reusable frontend components and SSR applications with React and Next.js, Redux, and React Query. Designed database schemas, indexes, stored procedures, and query optimization strategies across PostgreSQL, MySQL, MongoDB, DynamoDB, Redis, and Elasticsearch. Implemented cloud-native deployments on AWS services, containerized services with Docker and Kubernetes, and automated CI/CD pipelines using GitHub Actions/GitLab CI and Jenkins. Added real-time features using WebSockets/Socket.IO, Redis Pub/Sub, and jo

Senior Back-End Engineer at B & Y

Led backend development for enterprise web applications using Node.js, Express, NestJS, TypeScript, Python, Django, Flask, and PostgreSQL. Designed scalable microservices and modular backend systems for SaaS platforms, fintech workflows, healthcare tools, logistics dashboards, and CRM applications. Built RESTful APIs and GraphQL services supporting user management, reporting, payments, notifications, analytics, and admin workflows. Implemented secure backend services with JWT authentication, OAuth 2.0 flows, RBAC permissions, encrypted configuration, and audit logging. Developed event-driven workflows using Kafka, RabbitMQ, Redis queues, and background workers for asynchronous processing and high-volume business operations. Created database models, optimized SQL queries, improved indexes, and tuned slow endpoints across PostgreSQL, MySQL, MongoDB, and Redis. Integrated with payment gateways, CRM platform APIs, communication APIs, accounting systems, and enterprise third-party services.

Software Engineer at Citi Bank

Developed full stack web applications using JavaScript, Node.js/Express, React, Python (Django/Flask), and SQL technologies. Built backend APIs for authentication, data management, reporting, dashboards, file processing, and business workflow automation. Designed and maintained relational database tables, queries, joins, stored procedures, and data validation logic using MySQL and PostgreSQL. Built frontend screens and reusable UI components with React, Redux, Bootstrap, and responsive design practices. Integrated third-party APIs for payments, email notifications, SMS alerts, maps, and analytics. Built internal tools and admin portals for operations, customer support, reporting, and workflow tracking. Wrote Python scripts for data cleaning, file processing, scheduled jobs, API automation, and backend support tasks. Implemented REST API integrations using JSON/XML/HTTP clients, webhooks, and token-based authentication. Participated in code reviews, sprint planning, feature estimation,