Shanker Kumar

About Shanker Kumar

Backend Developer | Java & Spring Boot | Microservices | Cloud-Native EngineerHi! I’m Sai Shanker Kumar Emmadi — a backend developer who loves solving complex engineering problems with clean code and cloud-native thinking. I’ve worked across diverse tech ecosystems in the U.S. and India, building scalable microservices and robust backend systems that keep modern applications running smoothly. I specialize in building RESTful APIs and microservices using Spring Boot, secured with Spring Security and JWT, and deployed seamlessly on AWS using CI/CD pipelines, Docker, and Terraform. I’ve worked with modern Java frameworks and cloud-native tools to build resilient, high-performance applications — from event-driven services using Kafka and Kinesis, to real-time data processing with DynamoDB Streams, and containerized deployments in Kubernetes. I ensure observability and traceability using tools like OpenSearch and CloudWatch, and automate infrastructure using Terraform and CloudFormation. Tech Stack I work with:Java | Spring Boot | Spring MVC | Spring Cloud | Spring Security | JPA | HibernateAWS (Lambda, EC2, S3, RDS, DynamoDB, Kinesis, SQS, SNS, OpenSearch, CloudWatch, IAM, KMS)Kafka | Docker | Kubernetes | Jenkins | Terraform | GitLab CI/CD | Maven | JUnit | MockitoMongoDB | PostgreSQL | MySQL | Angular With a Master’s in Computer Science from Wichita State University and engineering contributions at Cigna, DTCC, and OpenText, I bring a strong blend of backend depth and practical cloud expertise.Let’s connect, collaborate, and create something innovative together!

Experience

1. Sr Software Developer

   Cigna Healthcare

   Jan 2023 — Present · Plano, TX, US

   Worked on the Supplementary Benefits Broker and Party Application, a key system within Cigna’s healthcare platform that manages brokers, individuals, and organizations involved in supplemental benefits. The application handles the complete lifecycle of broker interactions, including onboarding, registration, profile management, and service activation, while ensuring integration with external systems like Evolve and compliance with regulatory requirements.Key Contributions:• Developed RESTful APIs using Spring Boot and Spring Cloud to support broker and party onboarding and management workflows.• Integrated DynamoDB and Aurora DB for hybrid data storage to meet both NoSQL and relational requirements.• Built OpenSearch indexing pipelines for enabling real-time broker search and analytics.• Implemented event-driven components using AWS Lambda, SQS, SNS, and DLQ for asynchronous and fault-tolerant processing.• Managed API traffic through API Gateway, ALB, NLB, and Route 53 to ensure reliable service accessibility.• Automated infrastructure provisioning with Terraform and deployed services to AWS ECS and EC2.• Set up CI/CD automation with GitHub Actions and enforced security using OAuth2, JWT, and AWS WAF.• Collaborated with cross-functional teams to monitor system health, troubleshoot production issues, and improve observability using centralized logging and distributed tracing.• Participated in code reviews, unit testing, and production deployments to maintain high code quality and meet delivery deadlines.This platform supports critical operations across Cigna’s broker services by improving operational efficiency, data consistency, and user experience.

Education

• Wichita State University

  Master of Science - MS, Computer Science

• BV Raju Institute of Technology (BVRIT)

  Bachelor's degree, Computer Science