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KUMAR - JAVA FSD AI

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S.KUMAR UPPARAPALLI | Email: [email protected] Mobile: +1 248 823 8786 ------------------------------------------------------------------------------------------------------------------------------- PROFESSIONAL SUMMARY Senior Java Full-Stack Developer with 7+ years in designing, building, and deploying scalable, cloud-native microservices, including recent expertise in Generative AI (GenAI) and RAG systems. TECHNICAL SKILLS Back-End: Java, Spring Boot, Spring AI, Spring Security, Microservices, Kafka, RESTful & GraphQL APIs, Python, Numpy, Pandas. Front-End: React.js, Angular, Node.js, JavaScript, HTML/CSS AI/ML: GenAI, NLP, LLMs, Retrieval-Augmented Generation (RAG), Vector Embeddings, Prompt Engineering. Models & Tools: Google Vertex AI (Gemini 1.5 Pro), LangChain, Hugging Face, OpenAI API. Vector Databases: Pinecone (Serverless), PostgreSQL (pgvector). Google Cloud Platform (GCP): Cloud Run, Vertex AI, Cloud Functions, BigQuery, Cloud DLP (Data Loss Prevention), Cloud IAM. AWS: Lambda, EC2, S3, RDS, SQS, Batch, CloudWatch. DevOps & Containers: Docker, Kubernetes, CI/CD, Git, JIRA Databases: MySQL, MongoDB, Oracle Testing: JUnit, Mockito, Postman, Swagger EDUCATION Master s degree in information systems, Central Michigan University, Michigan, U.S CERTIFICATIONS Oracle Certified Professional: Java SE 17 Developer Aug 2025 AWS Certified Developer Associate, Amazon Web Services (AWS), Nov 2025 Lean Six Sigma Green Belt Certification Central Michigan University, Dec 2024 Hewlett Packard Enterprise Software Engineering Job Simulation Certification, June 2025 PROFESSIONAL EXPERIENCE Blue Cross Blue Sheild of Michigan (BCBSM) June 2025 Till Date Role: Sr. Software Developer Blue Cross Blue Shield is a leading national health insurance provider focused on delivering accessible and affordable healthcare. My role supported their mission by developing a secure, AI-powered Medicare Assistant application using Java Spring Boot and React to simplify complex insurance information for members and caregivers, ensuring strict compliance with HIPAA regulations. Built a secure Medicare Assistant app using Java Spring Boot for the backend and React for the front end, hosted on Google Cloud. Used Spring AI and Google Gemini to create an AI that answers questions using only our official PDF documents, which stopped the AI from making up false answers. Integrated Pinecone as a specialized vector database to store and search through 50,000+ insurance document embeddings, achieving much faster retrieval speeds compared to traditional SQL databases. Decoupled the system architecture by keeping user profiles in PostgreSQL and AI data in Pinecone, ensuring that heavy AI searches never slowed down the main application. Created a privacy filter in Java that automatically hides sensitive info like SSNs using Google Cloud DLP before sending any text to the AI, ensuring we followed HIPAA laws. Added security checks to stop users from tricking the AI into ignoring safety rules and bypassing restricted commands. Wrote logic that detects if the user is a Senior or a Caregiver, simplifying the language for seniors while showing detailed cost tables for caregivers. Set up monitoring dashboards to track how many tokens we used and optimized the prompts to reduce our monthly API bill by 30%. Added a Circuit Breaker pattern so that if the AI service goes down, the app automatically switches to a backup system, so users never see an error page. Built a Voice-to-Text feature in React so elderly users can just say their questions instead of typing. Central Michigan University Jan 2024 May 2025 Role: Software Developer Central Michigan University (CMU) is a major public institution. My work involved developing and maintaining mission-critical academic and administrative applications using Spring Boot and MySQL, specifically enhancing core services like class registration and the secure real-time gradebook for students and faculty. Designed and implemented new RESTful APIs with Spring Boot for core system modules, including class registration, assignment submission, and gradebook services. Engineered the back-end logic for the "Grades" module, allowing faculty to securely post grades and students to view their academic progress in real-time. Built and mapped all RESTful API endpoints using core Spring MVC components. Standardized API error handling across the application, providing clear and consistent error messages to the front-end. Leveraged Spring Data JPA and Hibernate to create repository interfaces, simplifying all database CRUD (Create, Read, Update, Delete) operations. Modeled complex database relationships between Java objects (like Student, Course, and Assignment) and the MySQL database schema. Authored custom JPQL (Java Persistence Query Language) queries to handle complex data retrieval that went beyond simple repository methods. Implemented role-based access control (RBAC) using Spring Security to protect endpoints and differentiate user permissions. Ensured that students could only access their own registration and grade information while faculty had the necessary permissions to manage their assigned courses. Wrote comprehensive JUnit and Mockito unit tests for the service and controller layers to verify business logic and ensure API reliability. Refactored legacy Java code into a more modular, service-oriented architecture, which improved maintainability and made the application easier to test. Performed integration testing on critical API endpoints using Postman to validate the full request/response flow and data persistence. Identified and resolved critical bugs in the back end, improving system stability for all users. Happiest Minds Technologies Jan 2021 Dec 2023 Client: Fluent Commerce Role: Senior Software Engineer Fluent Commerce is a highly scalable, event-driven Order Management System (OMS) platform. The system streamlines the lifecycle of key business entities (orders, inventory, fulfillment) by leveraging customizable workflows and core business logic. The architecture relies on efficient data retrieval via GraphQL and is hosted on AWS utilizing services like CloudWatch, Lambda, S3, and EC2 to ensure real-time tracking, high availability, and optimal system performance for complex order management needs of global retailers. Analyzed requirements and developed business scenarios to align with client needs. Collaborated with clients to clarify requirements and address queries, ensuring smooth project execution. Led weekly meetings with the onsite team, providing status updates and aligning deliverables. Implemented thorough requirements analysis and contributed to technical discussions, ensuring alignment with business objectives. Gained a deep understanding of workflows and business logic, optimizing system performance and efficiency. Resolved issues in JIRA as per client requirements, utilizing GraphQL and Postman to deliver timely solutions. Trained 4 new hires on the Fluent Commerce application, GraphQL, Postman APIs, JIRA, AWS CloudWatch, AWS Lambda, S3, EC2, Spring Boot APIs, and MySQL, reducing their onboarding time by 25%. Implemented key GraphQL APIs and JIRA Queries to streamline data retrieval. Delivered weekly and monthly status reports, and aligned solutions to client requirements, ensuring a 98% client satisfaction rate. Client: TMF Group (KRAIOS) Role: Software Engineer TMF Group is a global professional services firm specializing in business-critical administrative services (e.g., accounting, legal, compliance). My role involved building and enhancing KRAIOS, a proprietary, cloud-native enterprise web application on AWS designed to automate and streamline the firm's core international client service delivery and compliance processes. Developed a cloud-native web application on AWS, leveraging a wide range of services including EC2, Lambda, Batch, RDS, SQS, SES, S3, and ElastiCache to ensure scalability and high efficiency. Collaborated daily with clients, project leads, and cross-functional teams (QA, UI, DevOps) gather requirements and ensure seamless integration and deployment of features. Designed and implemented scalable microservices with RESTful APIs, enabling efficient, secure, and seamless data exchange across distributed systems. Authored efficient, maintainable, and scalable code by strictly adhering to SOLID principles and clean coding practices, resulting in high-quality, bug-free features. Implemented a comprehensive testing strategy using manual testing, unit testing with JUnit and Mockito, and developed end-to-end (E2E) test cases to validate complete API flows and ensure system reliability. Applied strong knowledge of Data Structures and Algorithms to build high-performance, memory-efficient Java solutions for complex, real-world problems. Built serverless functions with AWS Lambda, triggered by CloudWatch Events and SQS, to streamline asynchronous backend processing and enhance application scalability. Developed automated batch processes using AWS Batch to optimize compute resource utilization and improve throughput for large-scale task execution. Actively participated in all Agile (Scrum) ceremonies, including sprint planning, backlog grooming, and retrospectives, to drive continuous improvement within the team. Providing valuable architectural and design insights to project leads, contributing to continuous improvement and enhancing overall project efficiency. Managed application security by coordinating the timely rotation of property keys, ensuring correct updates across all repositories for secure service operations. Configured AWS CloudWatch metrics, logs, and dashboards to monitor application health, gain real-time performance insights, and enable rapid troubleshooting. Bridgelabz Solutions Jan 2020 Jan 2021 Role: Software Engineer Bridgelabz Solutions operates an extensive hands-on training and incubation program focused on creating industry-ready software developers. During my program, I worked within this framework to engineer a full-stack, production-ready web application (using the Angular, Spring Boot, MySQL stack) as a capstone project. This project was designed to simulate a real-world enterprise application environment, providing experience in developing end-to-end features, designing RESTful APIs, managing CRUD operations, and collaborating within an Agile development process. Engineered end-to-end features for a full-stack web application using an Angular and React JS front-end, Java/Spring Boot back-end, and MySQL database. Designed, implemented, and tested RESTful APIs using Spring Boot to manage all CRUD (Create, Read, Update, Delete) operations. Utilized Spring Data JPA with Hibernate for object-relational mapping (ORM), simplifying database interactions and repository logic. Developed and maintained responsive, component-based user interfaces using Angular, Bootstrap, HTML5, and CSS. Authored and optimized complex SQL queries for MySQL, improving data retrieval performance and reducing application latency. Actively participated in an Agile environment, attending daily stand-ups, sprint planning sessions, and code reviews. Managed source code versions and collaborated on a shared codebase using Git, including branching, merging, and pull requests. Marquee Software Solutions Pvt. Ltd. Jan 2019 Dec 2019 Role: Software Engineer Intern Collaborated in the development of responsive web applications using Java and Spring Boot, focusing on building scalable backend services that are integrated with Angular. Designed and implemented modular user interface components using HTML5, CSS3, and Bootstrap to ensure a consistent experience across different devices. Enhanced user engagement by developing client-side logic and interactive features with JavaScript, streamlining form validations and UI responsiveness. Developed and documented RESTful API endpoints using Spring Boot to facilitate efficient CRUD operations and data exchange. Leveraged Hibernate and Spring Data JPA to manage Object-Relational Mapping (ORM), simplifying database interactions and improving code maintainability. Optimized data retrieval by writing efficient SQL queries and using Hibernate to handle complex data relationships within a MySQL database. Maintained code integrity and facilitated team collaboration by using Git for version control, including managing branches and commits. Improved software reliability by writing and executing unit tests with JUnit, identifying and resolving bugs during the early stages of development. Keywords: continuous integration continuous deployment quality analyst artificial intelligence machine learning user interface javascript sthree