Java Full Stack Developer with 5+ Years Experience

Bhargav Kumar K Java Full Stack Developer

+1-561-***-**** ***************@*****.*** LinkedIn

PROFESSIONAL SUMMARY

Highly skilled Java Full Stack Developer with 5+ years of experience designing and delivering scalable, secure, and high- performance enterprise applications across FinTech, digital payments, and large-scale SaaS platforms. Strong expertise in Java, Spring Boot, Microservices, AWS, Kafka, React, and Angular, with a proven track record of building distributed systems that handle millions of transactions with low latency and high reliability. Adept at architecting event-driven workflows, developing intuitive front-end interfaces, and implementing robust CI/CD pipelines to accelerate product delivery. TECHNICAL SKILLS

Frontend Technologies: HTML5, CSS3, JavaScript (ES6+), TypeScript, React.js, Redux, React Hooks, Angular, Angular Material, Bootstrap, Tailwind CSS, Material UI, Responsive UI Design Backend & Microservices: Java, Spring Boot, Spring MVC, Spring Data JPA, Hibernate ORM, RESTful APIs, Microservices Architecture, Node.js, Express.js

Cloud & DevOps: AWS (EC2, S3, RDS, EKS), GCP, Docker, Kubernetes, Jenkins, GitHub Actions, Git, CI/CD Pipelines Event Streaming & Messaging: Apache Kafka, Event-Driven Architecture Databases: PostgreSQL, MySQL, MongoDB, SQL Server, Redis Testing & Quality Assurance: JUnit, Mockito, Jest, React Testing Library, Postman, Swagger/OpenAPI Tools & Platforms: Jira, Confluence, GitHub, GitLab, Bitbucket, Maven, Apache Tomcat, IntelliJ IDEA, VS Code, Eclipse Web Technologies & Formats: JSON, XML, YAML, SOAP Services Methodologies: Agile Scrum, Agile Kanban, SDLC Best Practices PROFESSIONAL EXPERIENCE

Java Full Stack Developer PayPal USA – Remote Jan 2024 – Present

Designed and developed scalable Spring Boot microservices for wallet management, payment authorization, and fraud evaluation using Java, Spring Data JPA, Hibernate, Kafka, reducing API response latency by 40%.

Built and optimized RESTful APIs integrating tokenization, OAuth2/JWT authentication, and secure data exchange

(JSON/XML), enabling high-volume real-time payment processing with 99.98% uptime.

Implemented Kafka-based event pipelines for transaction initiation, fraud scoring, and decision orchestration, enabling real-time streaming and reducing fraud detection time by 18%.

Developed responsive UI modules in React.js (React Hooks, Redux, ES6, Material UI) for wallet dashboard, send-money flow, transaction history, and fraud alerts.

Optimized React performance using component memorization, lazy loading, and Redux state normalization, ensuring smooth rendering for high-frequency transaction updates.

Integrated Redis cache for frequently accessed wallet and transaction metadata, reducing database load and improving API response times for high-traffic endpoints during peak payment volumes.

Containerized and deployed distributed services using Docker, AWS EKS (Kubernetes), EC2, RDS, and implemented CI/CD pipelines with Jenkins + GitHub, ensuring reliable and automated production rollouts.

Performed extensive testing using JUnit, Mockito, Jest, React Testing Library, increasing backend test coverage to 85% and preventing regression issues during rapid feature releases.

Collaborated in Agile Scrum with cross-functional teams, used Swagger/OpenAPI, Jira, Git, and contributed to architectural improvements that supported 3M+ users migrating to the new digital wallet ecosystem. Java Full Stack Developer TCS India May 2019 – Jul 2022

Developed modular Spring Boot microservices for customer onboarding, identity verification, document processing, and profile management using Java, Spring MVC, JPA, Hibernate, improving service scalability and onboarding automation by 45%.

Engineered RESTful API integrations with third-party KYC, AML, and e-signature services (JSON/XML), ensuring secure data exchange, encryption, and compliance with enterprise security standards.

Led development of Angular-based UI (TypeScript, RxJS, Angular Material, Tailwind, Bootstrap, React) for customer registration, digital forms, verification status tracking, and admin dashboards, reducing manual processing time by 30%.

Implemented advanced Angular features such as lazy loading, route guards, reactive forms, and reusable components, improving UI performance and decreasing initial load time by 50%.

Built Kafka event-driven workflows for real-time customer status updates, document ingestion, and audit trail logging, enabling asynchronous processing and improving onboarding reliability.

Optimized SQL and NoSQL data management using PostgreSQL (structured data) and MongoDB (document storage) with Hibernate caching, reducing query execution time and supporting high-volume customer profiles.

Containerized applications with Docker and configured CI/CD pipelines in Jenkins + Git, automating build/test/deploy cycles and reducing deployment failures by 70% while hosting microservices on GCP.

Improved system quality & reliability by implementing JUnit, Mockito test suites and performing code reviews, raising test coverage to 80%+ and ensuring defect-free releases under Agile Scrum delivery. EDUCATION

Master of Science in Computer Science Aug 2022 – May 2024 Florida Atlantic University Boca Raton, FL

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