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Shadow Cipher

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Full Stack Developer | Next.js | Nest.js | TypeScript | React.js
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Hi, I’m Sandeep Kumar! 👋

Full Stack Developer (Next.js | React.js | Node.js | Nest.js | TypeScript)

📍 Location: Kolkata, West Bengal, India
📧 Email: sdp4209@gmail.com
🔗 LinkedIn: linkedin.com/in/sandeepkumarofficial
🔗 Resume: Download Resume

About Me

Full‑stack developer with 2+ years of experience, delivering scalable applications and enterprise portals using Next.js, React.js, Node.js, Nest.js, TypeScript. Experienced in building authentication systems (RBAC), admin dashboards, WebSocket-based real‑time systems, and subscription modules.

I love converting ideas into working products — clean, scalable, and beautifully engineered.

Skills

🔧 Technical Skills

  • Frontend: React.js, Next.js, TypeScript, JavaScript, Tailwind CSS, TanStack Query
  • Backend: Node.js, Nest.js, Express.js, REST APIs, WebSockets
  • Database: MongoDB, SQL
  • Tools & Concepts: Git, AI Integrations (ChatGPT), Socket.io, CMS, Payment Integration
  • Other: Linux/Windows, C/C++

💡 Soft Skills

  • Problem Solving & Debugging
  • Team Collaboration
  • Time & Resource Management
  • Communication & Documentation

🚀 Featured Projects

🟦 TutorBe — EdTech Platform (Built independently)

Platform to find home tutors, explore study materials, read blogs, and apply for teaching jobs.

  • RBAC authentication (Student / Teacher / Coaching / Admin)
  • Study materials & classroom videos
  • Blog system + job portal for tutors
  • Complete admin dashboard for CMS & user management

Tech Stack: React.js, Express.js, MongoDB, Node.js

🟧 Copernicus — Secure EdTech Exam Suite (Enterprise Level)

A suite of 4 portals (Student, Supervisor, Admin, Informative website) for conducting secure online exams.

  • Live monitoring via camera, mic, screen sharing
  • Role-based workflows, student analytics, results & appeals
  • Dynamic CMS for super admin

Tech Stack: Next.js, Nest.js, TypeScript, WebSockets

🟩 FreightMatrix — Shipment & Logistics Platform

Shipment tracking with subscription-based access.

  • Real-time vehicle tracking dashboard
  • Subscription & payment system
  • CMS for tutorials and content

Tech Stack: Next.js, Nest.js, Media Players, TypeScript

🟪 Serva AI — AI Business Data Insights

Upload business data → Ask questions → Get insights using AI.

Tech Stack: Next.js, Nest.js, ChatGPT API

🟣 BikeCares — Quick Bike Service (Personal Project)

Real-time bike service + accessories delivery.

  • Live tracking
  • Service timeline
  • RBAC user-mechanic authentication

Tech Stack: Next.js, Nest.js, Socket.io, Google Maps API, TypeScript

Contact Me

📩 Email: sdp4209@gmail.com
🔗 LinkedIn: linkedin.com/in/sandeepkumarofficial