Building production web apps with REST APIs and AI features — RAG chatbots, LLM-powered support systems, and B2B platforms.
CSE @ SUST · Open to freelance work, internships, and full-time opportunities

Languages

Frontend

Backend

Databases & ORM

AI / LLM
Google Gemini API · Retrieval-Augmented Generation (RAG) · Prompt Engineering

Tools & DevOps

Production B2B platform, live at asthaengineering.com

• Industrial parts catalog backed by an 11-table PostgreSQL schema
• 40+ REST endpoints with JWT auth + refresh token rotation
• Bilingual (EN/BN) search & filtering
• Admin dashboard with WhatsApp notifications

React Node Express PostgreSQL Prisma Tailwind Client project — code private; the live product above serves as the case study.

Full-stack Retrieval-Augmented Generation chatbot, live at halioo-chat-bot.vercel.app

• Upload-to-answer RAG pipeline: PDF/TXT parsing → chunking → Gemini embeddings → pgvector similarity search
• Real-time token-by-token streaming via Server-Sent Events
• Per-user data isolation — vector search scoped to authenticated user, zero cross-user bleed-through
• JWT auth with bcrypt hashing, Zod-validated inputs, session history with auto-cleanup (last 5 kept)
• Context-aware assistant — answers general knowledge directly, nudges for document upload when it needs private context

React Node Express PostgreSQL pgvector Prisma Gemini 2.5 Flash LangChain Tailwind Solo-built, end-to-end — source available on GitHub.

View Repo →

AI-powered customer support system for mobile financial services.

• Hybrid architecture: deterministic rule-based logic + LLM reasoning for structured, safety-checked ticket decisions
• Multi-layer safety rules block credential requests, unauthorized promises, and suspicious redirects
• Automatic API-key rotation with failover
• Dockerized into a 69.5 MB image

Node.js 20 Express 5 Google Gemini 2.5 Flash Zod Docker

View Repo →

Full-stack wellness app for personalized health tracking, AI guidance, and community engagement. Built as a hackathon solution to fragmented health tracking.

• Personalized health profile creation and dashboard tracking
• AI-powered health insights and conversational assistant
• Daily challenges and gamified engagement mechanics
• Community feed for sharing wellness progress, plus a rewards store for motivation
• Healthcare consultation and resource discovery pages

React Vite Node.js Express MongoDB Mongoose JWT Groq SDK OpenAI SDK

📧 menayeemahmed100@gmail.com · 💼 LinkedIn · 🧩 Fiverr: me_nayeem2