Sameer T

About Sameer T

I am a Full-Stack developer with over 9 years of IT experience, specializing in designing, developing, and deploying cloud-native and enterprise-scale applications across AWS, Azure, and GCP. My expertise spans backend development (Java, Spring Boot, Microservices, Node.js, Python) and frontend technologies (React, Angular, TypeScript, JavaScript), enabling me to deliver scalable, high-performance, and secure solutions. I have worked on projects for leading clients such as UnitedHealth Group, Credit One Bank, Omega Healthcare, Cyient Ltd, Head Digital Works, and Happiest Minds, where I focused on building microservices architectures, reactive programming models, and cloud migrations. I bring strong experience in CI/CD automation (Jenkins, GitHub Actions, Terraform), containerization (Docker, Kubernetes), and observability (Prometheus, Grafana, ELK, Datadog, New Relic) to optimize application performance and reliability. My experience also includes working with databases (SQL Server, Oracle, MySQL, MongoDB, Snowflake, Redis, Cassandra, Aurora), implementing event-driven systems with Kafka/RabbitMQ, and leveraging DevOps and ITIL practices for streamlined service delivery. With a proven track record across banking, healthcare, and enterprise technology domains, I am passionate about bridging frontend, backend, and cloud infrastructure to deliver resilient, secure, and innovative business solutions.

Experience

1. Senior Full Stack Developer

   UnitedHealth Group

   Aug 2024 — Present · US

   As a Sr. Full Stack Java Developer, worked on the Field Assist application, managing 12+ microservices using Java 21, Spring Boot, Angular 16, React.js, WebFlux, and Kafka.• Developed and managed 12+ microservices for the Field Assist application using Java 21, Spring Boot, React.js, REST, R2DBC, Angular 16, Kafka and WebFlux Reactive Programming ensuring non-blocking processing, high throughput, and low latency for real-time data processing.•Transformed the application architecture to a client-centric model, implementing multi-tenancy and dynamic role-based access control (RBAC) to enable seamless client and owner assignments.• Developed and optimized RESTful APIs using Spring Boot and Java 21, with Sealed Classes, Record Types, Pattern Matching to enhance maintainability, reduce boilerplate, and improve type safety in complex data processing.• Migrated JDBC-based services to a fully reactive Java stack using R2DBC, eliminating thread contention, reducing database connection overhead, and improving I/O-bound operations with backpressure handling.• Utilized Spring Data R2DBC for efficient database access, leveraged Java Reactor’s Mono/Flux for asynchronous processing, and applied DTO transformations to optimize API responses.• Designed Spring WebFlux functional endpoints leveraging Java’s Flux and Mono, implementing flatMap, concatMap, and switchIfEmpty for optimized data transformations and efficient asynchronous processing.• Implemented Spring Cloud Gateway for dynamic routing, rate limiting, and security policies, ensuring seamless inter-service communication and controlled API exposure within the microservices ecosystem.• Implemented Spring Scheduler and Spring Batch to automate periodic data processing tasks, using Spring Batch for large-scale data processing with chunking and retry mechanisms, and Spring Scheduler for cron-based task automation, enhancing operational efficiency and reducing manual effort.

Education

• Jawaharlal Nehru Technological University Hyderabad (JNTUH)

  Bachelor of Technology (B.Tech.)

  2010 — 2014