Harsha Gaddam
Professional Summary
Full Stack Java Engineer with 4 years of experience designing and delivering secure, scalable microservices and full-stack applications across enterprise engineering, cloud, and CRM domains at NVIDIA, Oracle, and Salesforce. Proficient in Spring Boot, Hibernate, and REST/GraphQL API design on the backend, paired with React and Angular on the frontend. Experienced with Kafka-driven event architectures, AWS cloud deployments on ECS and Lambda, and container orchestration using Docker and Kubernetes. Applies OAuth2, JWT, and Spring Security to protect sensitive workflows. Integrates OpenAI API and LangChain for LLM-powered features, and uses JUnit 5, Mockito, and Selenium to enforce quality through TDD and integration testing. Holds AWS Certified Solutions Architect – Associate and an M.S. in Information Technology and Management from Illinois Institute of Technology.
Technical Skills
Work Experience
- Refactored REST endpoint routing and Hibernate/JPA query logic across Spring Boot microservices, improving request handling speed by 30% for internal engineering workflow tools.
- Implemented asynchronous Kafka event processing between Spring Boot services, keeping user-facing REST responses fast and ensuring downstream services remained fully decoupled.
- Secured platform services using Spring Security with OAuth2, JWT, and role-based access control, eliminating a class of unauthorized-access defects in sensitive engineering features.
- Built an LLM-powered document search feature using the OpenAI API and LangChain within Java REST workflows, applying Retrieval-Augmented Generation to accelerate technical lookups for internal engineers.
- Tuned Redis caching strategy and repository-layer logic shared across PostgreSQL and Oracle data stores, improving data retrieval throughput and transaction consistency for analytics workloads.
- Containerized Spring Boot services with Docker, deployed them to AWS ECS, EC2, and Lambda, and orchestrated service workloads with Kubernetes pods for reliable scaling.
- Automated build pipelines, release packaging, and routine operational tasks using Jenkins, Maven, and Python scripts, reducing manual deployment effort across environments.
- Diagnosed production stability issues by correlating application logs and metrics in AWS CloudWatch, identifying root causes and delivering targeted fixes that kept internal platforms stable.
- Designed Java/Spring Boot services with a GraphQL API layer using Spring MVC and Hibernate/JPA, cutting backend processing time by 25% for internal workflow and reporting applications.
- Optimized Oracle SQL queries, PL/SQL stored procedures, indexes, joins, and triggers for high-volume reporting workloads, improving query execution reliability under concurrent load.
- Restructured service, controller, DAO, and entity layers across Java/J2EE components into reusable, independently deployable modules, reducing duplication across reporting and business feature sets.
- Built React screens in TypeScript with Bootstrap integrated against the GraphQL backend, enabling business users to review and act on operational data with significantly fewer navigation steps.
- Enforced access control in internal workflows using Spring Security with RBAC and input validation, resolving access-related defects surfaced during QA cycles.
- Provisioned and automated Oracle Cloud Infrastructure environment setup using Python scripts, delivering consistent, repeatable releases across development, test, and staging environments.
- Established CI/CD pipelines with Jenkins and Maven for automated build, test, and deployment, removing manual handoff steps between development and release stages.
- Designed GraphQL and REST integrations between distributed Salesforce services, reducing repeated backend calls by 30% and accelerating data delivery to customer-facing Angular screens.
- Delivered Spring Boot and Angular features across form, search, and review workflows, cutting manual navigation steps on customer-facing screens through streamlined API-to-UI data flows.
- Built Spring MVC service layers with Hibernate/JPA, applying SQL query tuning, database mapping strategies, and validation rules that improved reporting data accuracy and long-term maintainability.
- Resolved production defects in Java services and Angular workflows by analyzing application logs, tracing root causes through the service stack, and delivering targeted fixes within sprint cycles.
- Validated REST APIs and Angular workflow coverage using JUnit 5, Mockito, Postman, and Selenium across unit, service, and end-to-end layers in collaboration with QA and DevOps teams.
- Automated build packaging and deployment with GitLab CI/CD and Maven, standardizing release steps and removing manual intervention from the deployment pipeline.
Projects
- Architected 3 independent Spring Boot microservices covering task assignment, user management, and notifications, using PostgreSQL for transactional data and MongoDB for activity history.
- Designed Kafka event flows for task-update, assignment, and reporting event types, enabling fully asynchronous, decoupled communication between services.
- Packaged all services with Docker and released them through Kubernetes and Jenkins on AWS, ensuring consistent, repeatable deployments across development and production environments.
- Built a secured investment-tracking application using Java, Spring Boot, and React that consolidated portfolio value, transaction history, and account activity into a single interface.
- Developed REST APIs with Spring Security, request validation, and Oracle PL/SQL procedures to maintain consistency across financial postings and transaction updates.
- Automated build, test, and Docker container deployment to AWS using GitHub Actions, eliminating manual release steps and reducing deployment risk.
Education
Certifications
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