Vivan Sharma

Full Stack Developer

Delhi, India 0+ yrs exp 81 · Excellent

About

Full Stack Developer with 6 months of industry experience at C-DAC building production-grade full-stack applications using React, TypeScript, Node.js, Express.js, MongoDB, and Socket.IO. Experienced in developing real-time collaborative systems supporting 200+ concurrent users and building scalable REST and WebSocket-based features. Also skilled in integrating AI/GenAI capabilities including LLMs, RAG, LangChain, vector databases, and semantic search into full-stack applications.

Skills & Expertise (33)

Typescript Intermediate

5.5/10

0.5

Years Exp

JavaScript Intermediate

5.5/10

0.5

Years Exp

React.js Intermediate

5.5/10

0.5

Years Exp

REST APIs Intermediate

5.5/10

0.5

Years Exp

Node.js Intermediate

5.5/10

0.5

Years Exp

Express.js Intermediate

5.5/10

0.5

Years Exp

Postman Intermediate

5.0/10

0.5

Years Exp

GitHub Intermediate

5.0/10

0.5

Years Exp

Git Intermediate

5.0/10

0.5

Years Exp

MongoDb Intermediate

5.0/10

0.5

Years Exp

WebRTC Intermediate

5.0/10

0.5

Years Exp

Tailwind CSS Intermediate

5.0/10

0.5

Years Exp

HTML Intermediate

5.0/10

0.5

Years Exp

Vite Intermediate

5.0/10

0.5

Years Exp

CSS Intermediate

5.0/10

0.5

Years Exp

Python Intermediate

4.5/10

0.5

Years Exp

JWT Intermediate

4.0/10

0.5

Years Exp

FastAPI Intermediate

4.0/10

0.5

Years Exp

SQL Intermediate

4.0/10

0.5

Years Exp

Docker Intermediate

4.0/10

0.5

Years Exp

MySql Intermediate

4.0/10

0.5

Years Exp

WebSockets Intermediate

4.0/10

0.5

Years Exp

RBAC Intermediate

4.0/10

0.5

Years Exp

LLM Beginner

3.5/10

0.5

Years Exp

RAG Beginner

3.5/10

0.5

Years Exp

Prompt Engineering Beginner

3.5/10

0.5

Years Exp

LangChain Beginner

3.5/10

0.5

Years Exp

ChromaDB Beginner

3.5/10

0.5

Years Exp

XGBoost Beginner

2.5/10

0.5

Years Exp

FAISS Beginner

2.5/10

0.5

Years Exp

Vercel Render Socket.IO

Work Experience

Full Stack Intern

Centre for Development of Advanced Computing (C-DAC)

Feb 2026 - Jul 2026

Built a full-stack real-time collaborative case management platform using React, TypeScript, Node.js, Express.js, and MongoDB, supporting 200+ concurrent users across 4 case types with case-centric messaging, file sharing, task management, notifications, presence, and JWT-based authentication and RBAC, achieving <100ms average real-time message latency. Engineered real-time WebRTC video meetings with multi-party peer-to-peer communication supporting 6 simultaneous participants, reducing call drop/reconnection failures by 20% through automatic reconnection and adaptive video quality, with screen sharing, active speaker detection, host moderation, device selection, and live transcription. Developed a production-hardened AI investigation suite using LangChain, Ollama, and ChromaDB, reducing manual case review time by 30% through automated chat/meeting summarization, semantic search, and investigation timeline generation across 200+ indexed cases. Implemented secure RAG and AI indexing pipelines with hybrid vector + lexical retrieval, achieving 85% retrieval precision while enforcing document-isolated Q&A and multi-layer ACL, processing 2,000+ documents/day through asynchronous job processing and recovery.