Freelance AI Agent Engineers in KolkataFreelance AI Agent Engineers in Kolkata
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Eajaj Hossain's avatar
Eajaj Hossain
Kolkata, India
AI Developer & Agentic AI Engineer
New to Contra
AI Developer & Agentic AI Engineer
Cover image for DocFlow AI – Intelligent Document
DocFlow AI – Intelligent Document Processing Platform DocFlow AI is an enterprise document intelligence platform that transforms unstructured documents into searchable, actionable knowledge. The platform automatically extracts information from PDFs, Word files, invoices, contracts, and reports, builds a searchable knowledge base, and enables users to interact with their documents through an AI assistant using Retrieval-Augmented Generation. It combines OCR, structured extraction, RAG, AI agents, and workflow automation to simplify document-heavy business operations. Features: PDF Processing OCR Pipeline RAG AI Chat with Documents Entity Extraction Document Classification Knowledge Base Citation Generation Role-based Access FastAPI Backend Tech Stack: Python FastAPI LangGraph LangChain ChromaDB PostgreSQL Docker Redis OpenAI OCR
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Cover image for Scopio – Multi-Agent AI Sales
Scopio – Multi-Agent AI Sales Automation Platform Scopio is a production-ready multi-agent AI platform designed to automate B2B sales and lead generation. The platform coordinates multiple AI agents to perform end-to-end sales workflows: Discover potential businesses from multiple sources Research company websites and public information Analyze business context using LLMs Generate personalized outreach emails Manage follow-up workflows automatically Maintain conversation history and workflow state I designed the agent architecture using LangGraph, enabling planning, tool calling, memory, and multi-step execution while integrating external APIs and backend services for reliable automation. Key Features Multi-Agent Architecture Autonomous Business Research AI-Powered Personalized Outreach Tool Calling & API Integration Workflow Orchestration Long-Term Memory PostgreSQL & Redis Integration Dockerized Deployment FastAPI Backend Tech Stack Python • LangGraph • LangChain • FastAPI • PostgreSQL • Redis • Docker • OpenAI • MCP • REST APIs
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Cover image for Built a production-ready Agentic AI
Built a production-ready Agentic AI nutrition assistant using LangGraph, LangChain, Hybrid RAG, FastAPI, ChromaDB, and SQLite. Features include: • Human-in-the-loop onboarding • Hybrid Retrieval-Augmented Generation • Long-term user memory • Deterministic nutrition engine • Tool calling and workflow orchestration • Guardrails to prevent hallucinated nutrition values • Automated evaluation pipeline Tech Stack: Python • LangGraph • LangChain • FastAPI • ChromaDB • SQLite • Groq Llama 3 • Streamlit
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Cover image for ResearchX – Autonomous Deep Research
ResearchX – Autonomous Deep Research AI Agent ResearchX is a production-ready autonomous research agent that performs end-to-end research with minimal human input. Instead of simply answering questions, the agent plans research tasks, searches multiple trusted sources, evaluates information quality, retrieves supporting evidence, and generates structured reports with citations. Built using a multi-agent architecture, the system combines planning, retrieval, tool calling, memory, and iterative reasoning to handle complex research tasks while reducing hallucinations through grounded retrieval and verification. Features: Autonomous Planning Multi-Agent Workflow Web Search Integration PDF Analysis RAG Pipeline Citation Generation Long-Term Memory Report Generation Source Verification Evaluation Framework Tech Stack: Python • LangGraph • FastAPI • Tavily • ChromaDB • PostgreSQL • Redis • Docker • OpenAI • Claude
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AI Agent Engineer(3)
Subham paul's avatar
Subham paul
Kolkata, India
AI Engineer
AI Engineer
Cover image for Solar Lead Automation System –
Solar Lead Automation System – AI Chatbot, WhatsApp Alerts & CRM Solar AI Lead Automation System This project is a modern AI-powered lead generation and automation platform built specifically for solar energy companies. The system helps solar businesses capture potential customer inquiries, respond instantly, and manage leads efficiently through an automated workflow. This platform helps solar companies respond faster to leads, improve conversion rates, and automate customer communication.
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Cover image for Book Roofing Appointments in Minutes
Book Roofing Appointments in Minutes with AI This demo showcases a fully responsive roofing website where homeowners can book inspections directly from their mobile devices using an AI-powered chatbot integrated with Calendly. The experience is designed to reduce response times, automate scheduling, and make it easier for roofing companies to convert website visitors into booked appointments. Features 📱 Fully responsive mobile design 🤖 AI chatbot for instant customer assistance 📅 Calendly appointment scheduling 🏠 Roofing inspection booking workflow ⚡ Fast and intuitive user experience 📧 Automated appointment confirmation 📊 CRM-ready lead capture 🔒 Secure and scalable implementation
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Cover image for Built a multi-division corporate website
Built a multi-division corporate website for Nexus Group, a diversified Indian conglomerate spanning retail & logistics, clean energy, real estate, agriculture, and aerospace. Features a hero with animated division carousel, leadership profiles, sustainability page, news section, and a full contact/partner CTA flow. Clean, enterprise-grade UI built with Lovable, production-ready.
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Cover image for AI chatbot built for a
AI chatbot built for a roofing business to handle site visitors 24/7. Homeowner engages instantly, books an inspection straight into Calendly without leaving the chat, and gets an automatic email confirmation with the calendar link while the lead's details route to the owner in real time. No missed forms, no delayed callbacks, no lost leads to competitors who answer faster.
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AI Agent Engineer(1)