Harsh Singh

Full Stack Developer specializing in React.js, Next.js, and Node.js, with experience shipping production features during a full stack internship — including a 30% API performance improvement and secure JWT-based authentication systems. Built 4+ full-stack applications from scratch, including an AI-integrated resume builder and a Jira-style task manager with role-based access control. Strong foundation in DSA (250+ problems solved) and OOP design.

Full Stack Developer Intern at Kavish Technology Pvt Ltd (2026-01 – 2026-04)

• Developed and maintained 3 web application modules (React.js, Node.js, MongoDB) that shipped features directly tied to business requirements, used daily by 5+ users.
• Designed and configured 10+ REST API endpoints with JWT authentication and role-based access control across 3+ user roles, reducing unauthorized access incidents to zero.
• Resolved 10+ application bugs through systematic testing, cutting bug recurrence and improving release stability.
• Shipped features in 2-week Agile sprints with a 6-person team, participating in code reviews and deployments
• Improved API response time by 30% through query and endpoint optimization, while maintaining a clean Git/GitHub workflow

B.Tech in Computer Science and Engineering – G L Bajaj Group of Institutions (2022-10 – 2026-06)