Java Developer Stack

Komal Teja Gangavarapu Full Stack Java Developer

309-***-**** *****.*.***********@*****.*** https://www.linkedin.com/in/komalteja/ PROFESSIONAL SUMMARY

• Senior Full Stack Java Developer with 5+ years of experience delivering scalable and secure enterprise applications across healthcare, banking, and retail. Proven track record of improving system performance by up to 40%, reducing release cycles by 30%, and enhancing user adoption through modernized front-end and cloud-native solutions.

• Skilled in designing microservices and SOA architectures with Spring Boot, REST, gRPC, and secured APIs using OAuth2/JWT. Experienced in building responsive UIs with ReactJS and Angular, integrating relational (MySQL, PostgreSQL, Oracle) and NoSQL (DynamoDB) databases, and deploying to AWS, Azure, and PCF with CI/CD pipelines.

• Specialized in applying Generative AI to enterprise use cases such as fraud detection, compliance, and unstructured data insights—reducing false positives by 15% and accelerating anomaly detection across financial transactions.

TECHNICAL SKILLS

● Backend & Frameworks: Core Java (8/11), Spring Boot, Spring MVC, Spring Security, Struts, Servlets, Node.js, Spring Cloud, RESTful APIs, SOAP, gRPC, Spring Cloud API Gateway

● Frontend & Web Technologies: ReactJS, Angular, AngularJS, TypeScript, JavaScript, HTML5, CSS3, Bootstrap, JSP, SASS, jQuery, Ajax

● Databases & ORM: MySQL, PostgreSQL, Oracle, DynamoDB, Hibernate, Spring Data JPA, Spring JDBC, PL/SQL

● Cloud & DevOps: AWS (S3, EC2, ECS, Lambda), Azure (Functions, Blob Storage, IAM), PCF, Docker, Kubernetes, Terraform, Cloud Foundry, Jenkins, GitHub Actions, GitLab CI, Maven, Gradle

● Testing & Quality: JUnit, Mockito, Cucumber, Jest, Mocha, Postman, Swagger UI, SonarQube

● Version Control & Monitoring: Git, SVN, Log4j, SLF4J, Log Insight

● AI/ML & Automation: Generative AI (LLM APIs), intelligent automation for fraud detection, unstructured data insights

PROFESSIONAL EXPERIENCE

HCA Healthcare – Nashville, TN Senior Java Developer July 2024 – Present Development Methodology: Agile Architecture Style: Microservices and SOA

● Developed HIPAA-compliant Spring Boot microservices for patient records, billing, and insurance, increasing scalability by 30% through modular architecture and backend optimizations.

● Designed and secured RESTful APIs using Spring Security with OAuth2 and JWT, implementing role-based access control and request filtering through Spring Cloud Gateway.

● Built real-time processing pipelines with Apache Kafka, Spring Batch, and gRPC for efficient inter- service communication, enhancing patient satisfaction and ensuring message reliability across claims and notification systems.

● Enabled lightweight, high-performance service calls between clinical microservices using gRPC, reducing latency by 40% compared to REST.

● Led the end-to-end development of a patient insights module, collaborating with UX and clinical teams to boost usability, increasing clinician adoption by 25%.

● Developed responsive Angular dashboards using HTML5, CSS3, SASS, Bootstrap, and PostCSS, reducing UI response time by 40% and improving clinician workflows.

● Integrated HL7/FHIR-compliant interfaces with EHR systems and enabled secure identity federation using SAML and OpenID Connect to support real-time patient data exchange across providers with SSO compliance.

● Designed a hybrid data storage solution using MySQL for structured transactions (patient billing/records) and DynamoDB for high-throughput semi-structured analytics, improving query performance and scalability across distributed healthcare services.

● Deployed containerized Spring Boot microservices to AWS using ECS and Docker; leveraged EC2 for internal testing environments, S3 for static assets/configuration, and Lambda for event-driven tasks such as log cleanup and post-deployment triggers.

● Provisioned infrastructure with Terraform and automated CI/CD pipelines using Jenkins, Maven, and GitLab, reducing release cycle time by 30%.

● Implemented robust unit and integration testing using JUnit, Mockito, and Cucumber, maintaining high code quality and minimizing regression risks.

● Promoted Agile best practices through code reviews, mentoring, and centralized logging with Log4j, resulting in a 20% reduction in deployment defects and faster team onboarding. Fifth Third Bank – Tampa, FL Java Backend Developer Dec 2020 – Aug 2023 Development Methodology: Agile Architecture Style: Microservices and SOA

● Engineered Spring Boot microservices for fraud detection, transaction workflows, and customer onboarding, enabling scalable and modular banking services.

● Developed secure RESTful APIs with OAuth2, JWT, and Azure IAM; implemented OpenID Connect for federated authentication and SAML-based SSO integration with external financial systems.

● Supported frontend teams by building backend services that powered ReactJS-based dashboards, reducing load time by 35% and improving customer engagement and task completion rate on the portal by 20%.

● Implemented asynchronous communication using RabbitMQ, reducing system coupling and improving service resiliency, resulting in fewer transaction delays and enhanced customer trust.

● Optimized transaction handling and SQL tuning using PostgreSQL with Hibernate ORM, improving query efficiency and reliability across critical banking workflows.

● Deployed services to Azure with developer-configured Jenkins pipelines and Gradle build tool for CI/CD.

● Built backend utilities and lightweight APIs using Express.js and Node.js to streamline React frontend integration and improve routing performance for non-critical services.

● Automated API test cases using Postman and Swagger UI to verify request-response structures and improve test coverage across critical banking services.

● Migrated legacy J2EE applications to Spring Boot microservices on PCF, cutting deployment time by 60% and increasing delivery velocity for time-sensitive banking features.

● Maintained secure logging with SLF4J, upheld code quality through SonarQube, managed version control using Git, and collaborated via JIRA.

● Applied Generative AI for fraud detection and compliance, developing proof-of-concept APIs that leveraged LLMs to detect anomalous transaction descriptions, reducing false positives by 15% and accelerating anomaly detection.

Costco – San Jose, CA Java Developer Aug 2019 – Dec 2020 Development Methodology: Waterfall Architecture Style: Monolithic

● Built Spring MVC, Servlets, and JSP modules for product catalog and order processing in a high- traffic e-commerce application.

● Created AngularJS dashboards with HTML, CSS, SASS, and Bootstrap, reducing order status inquiry calls by 20%, lowering support center workload and improving customer satisfaction.

● Designed SOAP-based web services using XML for vendor integration, improving synchronization accuracy by 25% and reducing manual data errors.

● Engineered Oracle as the primary database for order processing and inventory workflows, ensuring accurate inventory reconciliation and improving overall system reliability.

● Executed unit testing with JUnit and Mockito, and front-end testing with Karma and Jasmine for AngularJS components.

● Automated build and deployment with Ant, packaging WAR files to Apache Tomcat during QA/staging cycles.

● Optimized CI/CD by configuring GitHub Actions for static code analysis and automated deployments to Apache Tomcat on AWS EC2, reducing manual release effort.

● Managed version control with SVN and maintained project/task tracking and documentation in TFS to ensure traceability and release governance.

● Enhanced system stability with Log Insight, reducing incident debugging time by 30%, and authored API documentation that streamlined onboarding.

EDUCATION

• Western Illinois University, Macomb, IL

M.S. in Computer Science

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