Vaibhav Rai

Backend Developer (AI-focused)

0-1 years of experience

About

Final-year B.Tech IT student (graduating 2027) and backend developer focused on building AI-powered systems. Worked as a Backend Developer (Contract) at Network18, where I built Node.js/Express REST APIs, multi-device JWT auth with token rotation and revocation, RBAC, and a MySQL index refactor that improved query efficiency by ~90%. Outside work, I build projects like RoleNova (AI job aggregator with Gemini, deployed on Azure) and RepoSage (codebase intelligence platform using AST parsing and RAG). Stack: Node.js, Express, MongoDB, Python, LangChain, Azure. Looking for backend or AI engineering internship and new-grad roles, open to remote or relocation.

Skills

Languages: JavaScript
Python
C++
SQL
Backend & Web: Node.js
Express.js
REST APIs
JWT
RBAC/PBAC
FastAPI
React
AI / LLM: RAG
LangChain
ChromaDB
Tree-sitter (AST)
AI Agents
LLM APIs (Gemini
Groq
Cerebras
OpenRouter)
Databases: MongoDB
MySQL (Indexing)
Redis
DevOps: Docker
Azure
GitHub Actions CI/CD
Git

Experience

Backend Developer (Contract)
Network18 (via Freelancer.com) · August 2025 - December 2025
- Built and maintained REST APIs using Node.js and Express.js for production use- Designed multi-device JWT authentication with token rotation and revocation, so users could stay logged in across devices while stolen tokens could be invalidated- Refactored MySQL queries with composite indexes, improving query efficiency by ~90%- Implemented role-based access control (RBAC) to restrict endpoints and data by user role

Education

bachelor · IT · Parul University · 2027