Headline

Software Engineer | MERN Stack | LangChain • LangGraph • Vector DB | System Design | 2026 Graduate

About

I build web applications that scale — and I'm just getting started. Final-year B.Tech CSE student at JIS University (May 2026) | Full Stack Developer specializing in MERN Stack, Next.js, and real-time systems. I don't just write code. I architect solutions — MongoDB pipelines that cut API response time by 60%, WebSocket backends engineered for 5+ concurrent connections, and banking-grade security with JWT refresh-token rotation and RBAC. ━━━━━━━━━━━━━━━━━━━━━━━━━━━ TECH STACK ━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ Frontend → React.js · Next.js · TypeScript · Tailwind CSS · HTML5/CSS3 ▸ Backend → Node.js · Express.js · REST APIs · Socket.io ▸ Database → MongoDB · PostgreSQL (Supabase) · Query Optimization ▸ DevOps → Git · GitHub Actions (CI/CD) · Vercel · Docker · Linux · AWS ▸ Security → JWT · OAuth 2.0 · RBAC · bcrypt ▸ Testing → Jest ━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT I'VE BUILT ━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ EnviroGuardian — AI-powered environmental intelligence platform (Live & Deployed ) ▸ SecureBank — Full-stack banking system with Razorpay integration & atomic schema design ▸ TrackChat — Real-time chat + live device tracking (Socket.io | 5+ concurrent connections) ━━━━━━━━━━━━━━━━━━━━━━━━━━━ BY THE NUMBERS ━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ 60% reduction in API response time via multi-layer caching & MongoDB indexing ▸ 3 production-grade full-stack projects shipped end-to-end ▸ 10+ concurrent WebSocket connections in system architecture design ▸ Cisco CCNA-C Certified | Active DSA practice on LeetCode Open to: SDE · Full Stack Developer · Backend Engineer · Fresher Roles | 2026 Graduate 📩 saikatmaji200@gmail.com | Always open to connect

Location

Greater Kolkata Area

Work experience

Freelance / Self-Employed at Freelance, Jun 2025 - Present · 1 yr 2 mos, Kolkata, West Bengal, India, - Designing, developing, and deploying production-grade full-stack web applications independently using MERN Stack (MongoDB, Express.js, React.js, Node.js) and Next.js - Built EnviroGuardian — an AI-powered environmental intelligence platform with real-time IoT data aggregation, achieving 60% API response time reduction through MongoDB query indexing and multi-layer caching - Architecting SecureBank — a full-stack banking system with Razorpay payment gateway, atomic MongoDB schema design to prevent race conditions, and JWT + bcrypt RBAC authentication - Developing TrackChat — a real-time bidirectional chat and live device tracking system using Socket.io, designed to handle 10+ concurrent WebSocket connections via event-driven Node.js backend - Implementing CI/CD pipelines (GitHub Actions), containerization (Docker basics), and cloud deployment (Vercel, AWS basics) across all projects

Full Stack Development virtual Intern at Thiranex, Jun 2026 - Jul 2026 · 2 mos, Remote, Currently participating in a structured virtual Full-Stack Development internship at Thiranex, completing project-based assignments focused on MERN stack development. Building and submitting full-stack web applications—including a personal portfolio, task management system, e-commerce application, and blogging platform—as part of the program's evaluation. This is a remote, self-paced virtual internship based on project submissions and assessments, not a full-time or in-office employment role.

Gap year at Career Break, Feb 2021 - Mar 2022 · 1 yr 2 mos, Amta-II, West Bengal, India, Took time off to focus on personal development and prepare for competitive engineering entrance exams (JEE Mains). During this period, I also built a strong foundation in core computer science concepts, including data structures, algorithms, and networking. Additionally, I began exploring full-stack web development.

Education

Bachelor of Technology - BTech, Computer Engineering, JIS University