I am a Full Stack Developer with 6+ years of experience building scalable enterprise applications using Java, Spring Boot, microservices, and modern frontend technologies like React and Angular. I thrive on designing high-performance systems, delivering secure REST APIs, and leveraging cloud and DevOps tools to improve release velocity and reliability. My expertise spans from robust backend services to responsive frontend interfaces, with a strong focus on security (OAuth 2.0, JWT), database management (PostgreSQL/MySQL), and agile collaboration. I enjoy solving complex problems, writing tests, and continuously optimizing systems for real-time performance.

Praju Kumar

I am a Full Stack Developer with 6+ years of experience building scalable enterprise applications using Java, Spring Boot, microservices, and modern frontend technologies like React and Angular. I thrive on designing high-performance systems, delivering secure REST APIs, and leveraging cloud and DevOps tools to improve release velocity and reliability. My expertise spans from robust backend services to responsive frontend interfaces, with a strong focus on security (OAuth 2.0, JWT), database management (PostgreSQL/MySQL), and agile collaboration. I enjoy solving complex problems, writing tests, and continuously optimizing systems for real-time performance.

Available to hire

I am a Full Stack Developer with 6+ years of experience building scalable enterprise applications using Java, Spring Boot, microservices, and modern frontend technologies like React and Angular. I thrive on designing high-performance systems, delivering secure REST APIs, and leveraging cloud and DevOps tools to improve release velocity and reliability.

My expertise spans from robust backend services to responsive frontend interfaces, with a strong focus on security (OAuth 2.0, JWT), database management (PostgreSQL/MySQL), and agile collaboration. I enjoy solving complex problems, writing tests, and continuously optimizing systems for real-time performance.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
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Language

English
Fluent
Javanese
Fluent

Work Experience

Full Stack Developer at Brainvire Infotech Inc
August 1, 2024 - Present
Designed and developed a cross-platform e-commerce solution with Android applications using Java and Kotlin and responsive web interfaces using Angular and TypeScript for seamless multi-device shopping experiences. Engineered RESTful backend APIs with Spring Boot and PostgreSQL, optimizing queries to reduce response times by 35% during peak loads. Integrated Stripe payment gateway and Firebase Cloud Messaging, lowering cart abandonment by 18%. Managed deployments by publishing the Android app on Google Play Store and hosting the web platform on Vercel, achieving an average page load time of 1.2 seconds. Implemented CI/CD pipelines with Jenkins and containerized microservices using Docker, reducing deployment overhead by 40%. Enhanced reliability through Espresso instrumentation and Playwright end-to-end tests with a 95% automated test pass rate. Applied MVVM architecture for scalable and maintainable mobile applications.
Software Developer at Capgemini
July 31, 2023 - August 26, 2025
Led the development of SmartHealth Tracker, a cross-platform wellness application, building iOS features with Swift/SwiftUI and web modules with React.js, delivering seamless user experience for digital transformation objectives. Optimized backend microservices with Node.js/Express and MongoDB Atlas, improving API response times by 28%. Integrated Apple HealthKit API for fitness and nutrition data sync, achieving 95% cross-device synchronization accuracy. Managed iOS app deployments via TestFlight and hosted web platform on AWS S3 with CloudFront, achieving 90% user retention during pilot. Automated release by designing GitHub Actions CI/CD pipelines, reducing release cycles from 2 days to under 6 hours. Conducted automated testing using XCTest for iOS and Jest for web, reaching 92% code coverage and reducing regression defects by 30%. Collaborated within Agile Kanban teams with UI/UX and QA to deliver client-ready, compliant solutions.
Full Stack Developer at Brainvire Infotech Inc
August 1, 2024 - Present
Designed and developed a cross-platform e-commerce solution with Android apps using Java and Kotlin and responsive web interfaces using Angular and TypeScript, enabling seamless multi-device shopping experiences. Engineered RESTful backend APIs with Spring Boot and PostgreSQL, improving response times by 35% under peak loads. Integrated Stripe for secure payments and Firebase Cloud Messaging for real-time order updates, reducing cart abandonment by 18%. Managed deployment via Google Play Store and Vercel with optimized performance. Implemented CI/CD pipelines using Jenkins and Docker, reducing deployment overhead by 40% and increasing release frequency. Enhanced reliability with Espresso and Playwright automated testing, achieving 95% test pass rate. Applied MVVM architecture on mobile platforms for scalable, testable codebase.
Software Developer at Capgemini
July 31, 2023 - August 26, 2025
Led development of SmartHealth Tracker, a cross-platform wellness app with iOS features in Swift/SwiftUI and web modules in React.js, supporting digital transformation goals. Optimized backend microservices using Node.js/Express and MongoDB Atlas with query tuning and caching, improving API response times by 28% for 100+ concurrent beta testers. Integrated Apple HealthKit API for real-time fitness and nutrition data synchronization with 95% accuracy across devices. Managed iOS app deployment via TestFlight and web platform on AWS S3 with CloudFront, achieving 90% user retention among 100+ pilot users. Automated release via GitHub Actions CI/CD, reducing release cycles from 2 days to under 6 hours. Improved product quality with XCTest and Jest automated tests, attaining 92% code coverage and reducing regression defects by 30%. Collaborated with UI/UX designers and QA engineers in Agile Kanban sprints to deliver client-ready compliant solutions.
Full Stack Developer at Brainvire Infotech Inc
August 1, 2024 - Present
Developed full-stack features leveraging Java (Spring Boot) for backend services and JavaScript (Angular/TypeScript) for dynamic front-end interfaces, ensuring consistent functionality and performance across the platform. Designed and developed a cross-platform e-commerce solution by building Android applications with Kotlin and responsive web interfaces with Angular & TypeScript, enabling seamless multi-device shopping experiences. Engineered RESTful backend APIs using Spring Boot and PostgreSQL, applying database indexing and query optimization that reduced response times by 35% during peak loads of 500+ concurrent sessions. Integrated Stripe payment gateway for secure transactions and Firebase Cloud Messaging for real-time order updates, resulting in an 18% decrease in cart abandonment during user testing. Implemented CI/CD pipelines with Jenkins and containerized microservices using Docker, which reduced deployment overhead by 40% and improved release frequency. Strengthened applic
Software Developer at Capgemini
July 1, 2023 - September 16, 2025
Delivered end-to-end web modules using JavaScript (React.js) for responsive UI and Java (Spring Boot) for scalable backend APIs, aligning with enterprise-grade security and performance standards. Spearheaded the development of SmartHealth Tracker, a cross-platform wellness application, by building iOS features in Swift/SwiftUI and web modules in React.js, delivering a seamless user experience for digital transformation goals. Engineered and optimized backend microservices using Node.js/Express with MongoDB Atlas, applying query tuning and caching strategies that improved API response times by 28%, enabled smooth performance for 100+ concurrent beta testers. Integrated Apple HealthKit API to capture and sync fitness and nutrition data in real time, achieving 95% cross-device synchronization accuracy and enhancing compliance with healthcare data standards. Managed application deployment by distributing the iOS app via TestFlight and deploying the web platform on AWS S3 with CloudFront, r
Full Stack Developer at Brainvire Infotech Inc
August 1, 2024 - Present
Developed full-stack features using Java (Spring Boot) for backend services and JavaScript (Angular/TypeScript) for dynamic front-end interfaces, ensuring consistent functionality and performance across the platform. Designed and implemented a cross-platform e-commerce solution with Android (Kotlin) and responsive web interfaces (Angular/TypeScript). Engineered RESTful backend APIs with Spring Boot and PostgreSQL, applying indexing and query optimization to reduce response times during peak loads. Integrated Stripe for secure payments and Firebase Cloud Messaging for real-time order updates, improving cart conversion. Implemented CI/CD pipelines with Jenkins and Docker for containerized microservices, reducing deployment overhead and increasing release frequency. Strengthened reliability with instrumentation tests (Espresso) and end-to-end tests (Playwright), achieving high automated test coverage in CI.
Software Developer at Capgemini
July 1, 2023 - September 23, 2025
Delivered end-to-end web modules using JavaScript (React.js) for front-end and Java (Spring Boot) for backend APIs, aligning with security and performance standards. Led development of SmartHealth Tracker, a cross-platform wellness application, with iOS features in Swift/SwiftUI and web modules in React.js. Optimized backend microservices (Node.js/Express) with MongoDB Atlas, improving API response times and supporting 100+ concurrent beta testers. Integrated Apple HealthKit for real-time data sync and deployed iOS via TestFlight and web on AWS S3/CloudFront. Automated releases with GitHub Actions CI/CD, reducing cycle times. Expanded automated testing with XCTest and Jest, achieving high coverage.
Full Stack Developer at Brainvire Infotech Inc
August 1, 2024 - Present
Developed full-stack features using Java (Spring Boot) for backend services and JavaScript (Angular/TypeScript) for dynamic front-end interfaces, ensuring consistent functionality and performance across the platform. Designed and developed a cross-platform e-commerce solution by building Android applications with Kotlin and responsive web interfaces with Angular & TypeScript, enabling seamless multi-device shopping experiences. Engineered RESTful backend APIs using Spring Boot and PostgreSQL, applying database indexing and query optimization that reduced response times during peak loads of 500+ concurrent sessions. Integrated Stripe payment gateway for secure transactions and Firebase Cloud Messaging for real-time order updates, resulting in an 18% decrease in cart abandonment during user testing. Implemented CI/CD pipelines with Jenkins and containerized microservices using Docker, which reduced deployment overhead by 40% and improved release frequency. Strengthened application reliab
Software Developer at Capgemini
July 1, 2023 - September 23, 2025
Delivered end-to-end web modules using JavaScript (React.js) for responsive UI and Java (Spring Boot) for scalable backend APIs, aligning with enterprise security and performance standards. Spearheaded the SmartHealth Tracker project, building iOS features in Swift/SwiftUI and web modules in React.js, delivering a seamless user experience for digital transformation goals. Engineered and optimized backend microservices using Node.js/Express with MongoDB Atlas, applying query tuning and caching strategies that improved API response times by 28% under 100+ concurrent beta testers. Integrated Apple HealthKit API to capture and sync fitness data in real time, achieving 95% cross-device synchronization accuracy. Managed deployment by distributing the iOS app via TestFlight and deploying the web platform on AWS S3 with CloudFront, reaching 100+ pilot users and achieving high retention in the first month. Automated release processes with GitHub Actions CI/CD pipelines, reducing release cycles
Full Stack Developer at Brainvire Infotech Inc
August 1, 2024 - November 5, 2025
Developed full-stack features using Java (Spring Boot) for backend services and JavaScript (Angular/TypeScript) for dynamic front-end interfaces; built a cross-platform e-commerce solution with Android (Kotlin) and responsive web interfaces, enabling seamless multi-device shopping experiences. Engineered RESTful APIs with Spring Boot and PostgreSQL, applying indexing and query optimization to reduce response times during peak loads. Integrated Stripe for secure payments and Firebase Cloud Messaging for real-time order updates. Implemented CI/CD pipelines with Jenkins and containerized microservices using Docker to reduce deployment overhead and improve release frequency.
Software Developer at Capgemini
July 1, 2023 - July 1, 2023
Delivered end-to-end web modules using JavaScript (React.js) for responsive UI and Java (Spring Boot) for scalable backend APIs. Led the SmartHealth Tracker project, spanning iOS features (Swift/SwiftUI) and web modules (React.js), delivering a seamless cross-platform experience. Optimized backend microservices with Node.js/Express and MongoDB Atlas, improving API response times and handling 100+ beta testers. Managed deployments via TestFlight and AWS S3/CloudFront, achieving 100+ pilot users and strong retention in initial months. Automated releases with GitHub Actions CI/CD, reducing cycles from 2 days to under 6 hours.
Full Stack Developer at Brainvire Infotech Inc, USA
February 1, 2024 - Present
Engineered RESTful microservices using Java 17 and Spring Boot to manage asset inventory and license tracking, improving real-time visibility across 1000+ enterprise assets and reducing manual errors by 95%. Developed dynamic React.js dashboards with Redux for asset visualization, reporting, and data filtering, accelerating audits by 50%. Implemented RBAC with Spring Security and JWT/OAuth 2.0 to secure IT assets and user data, reducing unauthorized access by 30%. Integrated Jenkins and Docker-based CI/CD pipelines for automated builds and deployments with near-zero downtime. Designed event-driven workflows using Kafka and Redis, reducing request resolution time by 40%. Applied TDD with JUnit, Mockito, Selenium, and AWS services to validate microservices and UI flows, boosting production reliability by 35%. Monitored system performance using the ELK stack to drive predictive maintenance and reduce IT downtime by 15%.
Software Developer at Capgemini, INDIA
October 1, 2019 - July 1, 2023
Architected RESTful microservices with Spring Boot and Spring Cloud to automate IT ticketing and asset workflows, reducing average resolution time by 35% and improving SLA compliance. Built Angular 11/12 dashboards for asset tracking, ticket submission, and SLA visualization, increasing end-user satisfaction by 30%. Enforced secure authentication using Java 12, Spring Security, OAuth 2.0, and JWT RBAC, improving regulatory compliance and security. Orchestrated CI/CD pipelines with Jenkins and Docker for automated builds and deployments across environments, enabling near-zero downtime. Implemented Kafka and RabbitMQ-based real-time notifications and caching with Redis to accelerate IT workflow. Validated microservices and UI with JUnit, Mockito, Selenium, and Postman, ensuring bug-free releases and 35% higher reliability. Monitored dashboards to provide analytics for IT leadership, reducing redundant assets by 22% and saving $250K annually.
Software Developer at Capgemini
October 1, 2019 - July 1, 2023
Architected RESTful microservices with Spring Boot and Spring Cloud to automate IT ticketing and asset workflows, reducing average resolution time by 35% and boosting SLA compliance. Delivered Angular dashboards with TypeScript for asset tracking and SLA visualization, and enforced secure authentication using OAuth 2.0/JWT RBAC. Established CI/CD pipelines with Jenkins and Docker, and implemented real-time notifications via Kafka/RabbitMQ with Redis caching. Validated releases through TDD with JUnit/Mockito/Selenium/Postman, and provided analytics for IT leadership to optimize procurement and asset utilization.
Full Stack Developer (Volunteer / Part Time) at DevLaunchers
October 1, 2025 - Present
Designed and developed a modular user profile system using React, improving scalability and maintainability. Built a complete Edit Profile experience (Bio, Skills, Interests, Details) with smooth and consistent UI interactions. Implemented state management using Context API (Constate) for profile updates, change tracking, and save/discard functionality. Integrated backend services using REST APIs (Axios) for real-time data updates. Optimized performance using useMemo, useEffect, and efficient state handling to reduce unnecessary re-renders.
Full Stack Developer (Volunteer /Part Time) at DevLaunchers
October 1, 2025 - Present
Designed and developed a modular user profile system using React, improving scalability and maintainability. Built a complete Edit Profile experience (Bio, Skills, Interests, Details) with smooth and consistent UI interactions. Implemented state management using Context API (Constate) for profile updates, change tracking, and save/discard functionality. Integrated backend services using REST APIs (Axios) for real-time data updates. Optimized performance using useMemo, useEffect, and efficient state handling to reduce unnecessary re-renders.

Education

Masters of Science in Computer Science at Auburn University at Montgomery
August 1, 2023 - May 1, 2025
Masters of Science in Computer Science at Auburn University at Montgomery Alabama
August 1, 2023 - May 31, 2025
Master of Science in Computer Science at Auburn University at Montgomery
August 1, 2023 - May 1, 2025
Masters of Science in Computer Science at Auburn University at Montgomery
August 1, 2023 - May 1, 2025
Masters of Science in Computer Science at Auburn University at Montgomery
August 1, 2023 - May 1, 2025
Master of Science in Computer Science at Auburn University at Montgomery
August 1, 2023 - May 1, 2025
Master of Science in Computer Science at Auburn University
January 11, 2030 - May 1, 2025
Master of Science in Computer Science at Auburn University
January 11, 2030 - May 1, 2025
Master of Science in Computer Science at Auburn University
August 1, 2023 - May 1, 2025
Master of Science in Computer Science at Auburn University
August 1, 2023 - May 1, 2025

Qualifications

Legacy JavaScript Algorithms and Data Structures
January 11, 2030 - August 26, 2025
React Native -The Practical Guide
January 11, 2030 - August 26, 2025
Legacy JavaScript Algorithms and Data Structures
January 11, 2030 - August 26, 2025
React Native - The Practical Guide
January 11, 2030 - August 26, 2025
Legacy JavaScript Algorithms and Data Structures
January 11, 2030 - September 16, 2025
React Native - The Practical Guide
January 11, 2030 - September 16, 2025
Agile Project Management: Agile, Scrum, Kanban & XP
January 11, 2030 - September 16, 2025
Legacy JavaScript Algorithms and Data Structures
January 11, 2030 - September 23, 2025
React Native - The Practical Guide
January 11, 2030 - September 23, 2025
Agile Project Management: Agile, Scrum, Kanban & XP
January 11, 2030 - September 23, 2025
Legacy JavaScript Algorithms and Data Structures
January 11, 2030 - September 23, 2025
React Native - The Practical Guide
January 11, 2030 - September 23, 2025
Agile Project Management: Agile, Scrum, Kanban & XP
January 11, 2030 - September 23, 2025
Legacy JavaScript Algorithms and Data Structures
January 11, 2030 - November 5, 2025
React Native - The Practical Guide
January 11, 2030 - November 5, 2025
Agile Project Management: Agile, Scrum, Kanban & XP
January 11, 2030 - November 5, 2025
Advanced TypeScript Certification – Skivvy
January 11, 2030 - November 5, 2025
FreeCodeCamp Responsive Web Design Certification
January 11, 2030 - November 5, 2025

Industry Experience

Healthcare, Retail, Software & Internet, Financial Services, Media & Entertainment, Professional Services, Real Estate & Construction, Computers & Electronics

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
See more