Harshit Kumar
Full Stack Developer
About Me
I am a versatile Full Stack Developer with years of experience designing and building highly scalable web and mobile applications. I specialize in crafting seamless frontend experiences using React.js and Next.js, while architecting optimized backend systems with Node.js, Golang, and microservices. My expertise includes building event-driven architectures, scalable REST APIs, and real-time applications with PostgreSQL, MongoDB, Redis, and BullMQ. Additionally, I develop cross-platform mobile apps using Flutter and deploy production-ready solutions on AWS, leveraging Docker, S3, and CloudFront. Passionate about solving complex problems, I take full ownership of projects, delivering end-to-end solutions from design to deployment while ensuring maintainability, performance, and scalability.
Skills & Expertise
Programming Languages: JavaScript, TypeScript, Python, Dart
Frontend Development: HTML5, CSS3, React.js, Next.js
Backend Development: Node.js, Express.js, Golang
Databases: MongoDB, PostgreSQL, Redis
Cloud & DevOps: AWS, Docker
Application Development: Flutter
Tools & Platforms: VS Code, Git & GitHub
Experience
Full Stack Developer
3a Learning Solutions India Pvt. Ltd [May 2022 - Present]
- Started as a Frontend Developer; built 3+ React.js websites and migrated the company’s main website from WordPress to React.js, integrating Firebase and implementing technical SEO.
- Developed additional full stack MERN applications, handling both frontend and backend independently.
- Built scalable backends using Node.js + Express + TypeScript, with PostgreSQL (with connection pooling), Redis caching, BullMQ for messaging queues, AWS EC2 hosting, S3 storage, and CloudFront for APIs.
- Deployed Node.js backends on multi-threaded environments using PM2 with clustering, despite Node being single-threaded, ensuring high performance and stability.
- Developed full stack Next.js applications using Next.js as frontend and backend (API routes), and successfully deployed them on Vercel and AWS.
- Managed and monitored all websites and web applications regularly, ensuring uptime, performance, and maintenance.
- Worked on LMS development: designed and delivered a mini LMS using React frontend and Node.js + Express + TypeScript + PostgreSQL backend, successfully deploying backend on AWS and frontend on Vercel.
- Delivered training sessions to college students and interns on web development, MERN stack, and best coding practices.
- Handled all projects independently without a team, taking full ownership of development, deployment, and monitoring.
Education
Bachelor of Technology (B.Tech)
Information Technology | 2021 - 2024
J.P. Institute of Engineering & Technology
Affiliated to AKTU
Polytechnic (Diploma)
Computer Science | 2018 - 2021
J.P. Institute of Engineering & Technology
Affiliated to BTEUP
Projects
Harshit Kumar Portfolio | Next.js
My Portfolio website built in Next.js
Mish Bioservices | Next.js
Business website built in Next.js with a beautiful, responsive, and optimized UI.
Campus Sutras Website | Next.js & Node.js
Campus Sutras company website with features like online assessments with solid backend.
3a Learning Solutions Website | Next.js
3a Learning Solutions Website built in Next.js with optimized and responsive UI.
LMS Server | Node.js
Production-level LMS backend system with JWT, bcrypt, Redis caching, and AWS deployment.
LMS Frontend | React.js
LMS UI in React.js with ShadCN UI library, features included like dashboards, forms, and list pages.