Sai Shanker
Sr Java Full Stack Developer @Cigna Healthcare
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WORK HISTORY
Sr Java Full Stack Developer @Cigna Healthcare
Plano, TX, US
Owned a critical application module built on Java 17 and Spring Boot, ensuring secure, stable delivery aligned with healthcare compliance and internal security standards.Legacy monolithic services were refactored into independently deployable Spring Boot microservices, improving scalability, fault isolation, and operational stability in a high-concurrency environment.Backend services were structured using RESTful APIs with Spring MVC, improving maintainability and simplifying integrations with downstream claims, enrollment, and reporting systems.Frontend modernization efforts included upgrading to Angular 11, enhancing usability, accessibility compliance, and overall responsiveness across desktop and mobile platforms.UI components were structured using HTML5, CSS3, JavaScript, and UI Bootstrap, aligning with enterprise UI standards and accessibility guidelines. Persistence logic was restructured using JPA and Hibernate, optimizing entity relationships and improving data consistency across transactional workflows.Database migration activities supported the transition from Oracle to PostgreSQL and DynamoDB, improving performance and reducing operational overhead.Cloud infrastructure was managed on AWS, leveraging EC2, S3, RDS, and EBS to support scalable and resilient application deployments.Infrastructure provisioning and configuration were automated using Terraform and CloudFormation, enabling consistent environments across development, test, and production.Application logs and metrics were centralized using OpenSearch, improving troubleshooting, monitoring, and production support response times.Security controls were enforced using Spring Security, JWT, and OAuth 2.0, ensuring secure authentication and authorization across services.Event-driven data flows were handled using Apache Kafka, enabling reliable asynchronous communication between microservices. CI/CD pipelines were maintained using Git-based workflows, supporting automated builds & deployments.
EDUCATION
Jawaharlal Nehru Technological University Hyderabad (JNTUH)
Bachelor's degree, Computer Science
Wichita State University
Master's degree, Computer Science
ABOUT SAI SHANKER
Around 10 years of experience in IT industry. Experienced in Processing requirements, Design, Development, Testing and Implementation for Java and J2EE applications.Experience in cloud services using Amazon Web Services (AWS) and Google Cloud Platform (GCP) and AzureHands on experience in GCP services like EC2, S3, ELB, RDS, SQS, EBS, VPC, EBS, AMI, SNS, RDS, EBS, Cloud Watch, Cloud Trail, Cloud Formation GCP Config, Auto scaling, GKE, Cloud Front, IAM, R53.Experience on AWS Deploying, managing and operating scalable, highly available, and fault tolerant systems and managed continuous delivery systems and methodologies on AWSExcellent knowledge on On-premises Active directory Cloud Azure AD, Azure AD Domain Services.Very deep understanding and working knowledge on Confluent Kafka and Apache Kafka components. Extensive working experience on Confluent Kafka and Kafka components and real time message systems.Experience in developing enterprise level solution using batch processing (using Apache Pig) and streaming framework (using apache Kafka and Apache Flink)Experience in developing and supporting with API Management tool – in Angular JS, Angular 12/3/4/5/6/7, React, React Native and Node.JSGood experience in using WebLogic Portal 10gR3/11gR1 Technology.Experience in Deploying and configuring web applications using web/application servers like Apache Tomcat, JBoss, Web Sphere, Web Logic, and Glassfish. Experience in Log4j for logging, debugging, and error tracing.Command in React.JS for creating interactives using Virtual DOM, JSX, React Native concepts.Used latest Spring Boot stack, which is radically faster in building cloud based Micro services with very less configuration.Design and development of Microservices using Spring Boot, Java 8, Kafka, NoSQL, and other Java/J2EE Write Micro Service using spring Boot and deploy into open shift to query the data from Google spanner/Big query.Designed and developed REST based micro services using Spring Boot.Deployed Spring Boot based micro services Docker container using AWS EC2 container services and AWS admin console
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