Sajjan Kumar
Computer Science graduate (B.Tech, First Division, 2025) with hands-on experience building Java applications using Spring Boot and REST APIs
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About
Computer Science graduate (B.Tech, First Division, 2025) with hands-on experience building Java applications using Spring Boot and REST APIs. Solid foundation in OOP, Data Structures and Algorithms, and DBMS, developed through academic coursework and project work. Familiar with SQL/NoSQL databases, basic unit testing, debugging, and Agile/Scrum practices. Quick learner looking to grow as a software developer and build on existing project experience.
Experience
Summer Intern, Ethical Hacking and Penetration Testing - Centre for Development of Advanced Computing (CDAC) - Noida, Uttar Pradesh
(2024-05 - 2024-06)
- Performed security assessments across 10+ controlled environments, identifying 15+ attack vectors including SQL Injection and Cross-Site Scripting (XSS) using OWASP methodologies.
- Applied secure coding practices to Java and REST API development, including input validation and defense against common web application vulnerabilities.
- Collaborated with a team to document findings in structured audit reports, strengthening analytical and technical writing skills.
Education
Bachelor of Technology - Computer Science and Engineering - University of Lucknow (2021-08 - 2025-06)
