
Sonu Kumar
Full Stack Developer, Backend Developer, Java Developer, Java Full Stack Developer, Web Developer
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About
I am an aspiring Software Developer with a strong foundation in Core and Advanced Java, Object-Oriented Programming, Data Structures, Spring Boot, Spring MVC, REST APIs, Microservices, SQL, and MySQL. I have hands-on experience in backend and full-stack application development, with exposure to Banking, Education, E-commerce, Healthcare, Event Management, and AI/LLM-based application domains.
My primary technical expertise includes Java, Spring Boot, Spring MVC, RESTful APIs, Microservices, JWT Authentication, SQL, MySQL, and database-driven application development. I also have hands-on experience with the MERN stack, including MongoDB, Express.js, React.js, and Node.js, along with JavaScript, HTML, and CSS for developing responsive and user-focused web applications.
My development experience covers REST API development, authentication and authorization, database integration, CRUD operations, frontend-backend integration, business logic implementation, debugging, performance optimization, and application workflow development. I have worked on solutions involving banking and financial workflows, microservices-based systems, educational platforms, e-commerce applications, healthcare services, and AI-assisted software solutions.
I also have practical exposure to Software QA and Test Automation, including manual testing concepts, test case design and execution, defect identification, Selenium, TestNG, Maven, and the Page Object Model (POM). This gives me an understanding of software quality from both development and testing perspectives.
In addition, I have basic knowledge of PHP and experience with PHP-MySQL based web application development. I am familiar with Git, GitHub, IntelliJ IDEA, Eclipse, VS Code, and Maven, with basic exposure to AWS services such as EC2 and S3.
I am passionate about building clean, secure, efficient, and maintainable software solutions. I continuously improve my problem-solving, programming, backend development, full-stack development, testing, and software engineering skills while learning modern technologies and development practices.
I am open to opportunities as a Software Developer, Java Developer, Backend Developer, Full-Stack Developer, MERN Stack Developer, or Software QA/Automation Engineer where I can contribute to real-world products, collaborate with professional teams, and continue growing as a software engineer.
Experience
Codec Technologies Java Developer Intern Feb 2025– Apr 2025 Virtual Internship
- Strengthened backend development, API integration, and performance optimization abilities through hands-on project work.
- Improved efficiency by 40% and enhanced software stability through debugging and optimization.
- Assisted in building backend APIs and frontend modules using Java, Spring Boot, SQL, HTML, CSS, and JavaScript.
Infosys SpringBoard Java Developer Intern Nov 2025– Jan 2026 Virtual Internship
- Contributed to Java-based backend development and testing, improving application stability and performance.
- Assisted in developing light automation components using Java, Selenium, TestNG, Maven, and collaborated on code management with Git/GitHub, Eclipse, and IntelliJ IDEA.

