Preet Kumar

Results-driven Software Engineer with 3 years of experience designing, building, and deploying scalable, high-performance web applications. Expert in React.js, Next.js, Node.js, and NestJS, with a strong focus on frontend optimization, backend architecture, RESTful API integration, and SEO-friendly development. Proven track record of improving performance, reducing load times, and delivering secure, modular, production-ready solutions within Agile teams.

Software Engineer - Khan Global Studies - Noida, India

(2023-07)

• Developed and maintained 10+ responsive, SEO-friendly, and scalable web applications using React.js, Next.js, Tailwind CSS, and Bootstrap, serving thousands of daily active users.
• Implemented Server-Side Rendering (SSR) and Static Site Generation (SSG) in Next.js, improving search engine ranking and reducing initial page load time by approximately 30%.
• Built and integrated 25+ secure RESTful APIs for authentication (JWT, OAuth) and CRUD operations using Node.js and NestJS.
• Designed reusable UI component libraries and managed application state with Zustand and Context API, reducing code duplication by 40% and improving maintainability.
• Optimized frontend performance through lazy loading, code splitting, and API caching, reducing bundle size and improving Core Web Vitals scores.
• Modeled and queried data in MongoDB and MySQL to store and retrieve application data securely and efficiently.
• Collaborated with cross-functional teams in an Agile environment using Git, Jira, and Bitbucket for version control and sprint planning.
• Architected the complete UI with React.js and Next.js, ensuring SEO optimization, responsive layouts, and WCAG accessibility across devices.
• Integrated RESTful APIs for courses, test-series, study materials, and current affairs, enabling seamless real-time data flow between frontend and backend.
• Executed Server-Side Rendering (SSR) to improve search engine visibility and page performance, cutting page load times by ~30%.
• Developed a modern web application using Vite and TanStack Router, ensuring fast builds, modular routing, and maintainable architecture.
• Implemented secure authentication flows (login, signup, password recovery) with token-based session management.
• Enhanced user experience with robust error handling, form validation, and responsive UI components.

Bachelor of Technology - Computer Science - Saraswati Institute of Engineering & Technology (2016 - 2020)