DhruvRathi

Context-aware document Q&A with hybrid retrieval and cross-encoder reranking.

A full-stack document chatbot that combines dense vector search with BM25 sparse retrieval for high-accuracy document Q&A. Built with LangChain, FastAPI, and ChromaDB, with session-isolated document pipelines that keep each user's context cleanly separated. Supports multi-format document ingestion for seamless knowledge extraction and retrieval.

LLM-powered agentic system that orchestrates multiple tools and APIs to generate travel plans.

An agentic AI system powered by a Groq LLM that coordinates flight, hotel, weather, and route tools to build complete travel itineraries. It executes independent searches concurrently, processes and ranks candidate options against user constraints, and adaptively replans when the generated plan fails validation.

Attention-based deep learning system for distinguishing AI-generated images from real photographs.

A hybrid deep learning system that distinguishes AI-generated images from real photographs by combining spatial features with frequency-domain and color-stability signals. Built around a custom FDCS-Net V4 architecture with EfficientNet-B0, FFT-based feature extraction, perturbation-based color analysis, and attention-driven feature fusion.

ML pipeline predicting invoice payment timelines across 50,000+ B2B transactions.

An end-to-end machine learning pipeline built on 50,000+ enterprise invoice transactions to predict payment delay duration. The system covers data preprocessing, exploratory analysis, feature engineering, recursive feature elimination, and comparative ensemble modeling, with a Streamlit dashboard for interactive predictions.

Production-ready e-commerce platform with JWT authentication, RBAC, Razorpay.

A full-stack e-commerce platform built with Node.js, Express.js, and MySQL, supporting product catalog, cart, orders, user, and inventory management. Implements JWT-based authentication, bcrypt password hashing, role-based access control, and Razorpay payments with server-side signature verification.

Concurrency-safe healthcare appointment platform with Google Calendar sync and LLM-powered visit summaries.

A healthcare appointment management system with concurrency-safe scheduling using PostgreSQL advisory locks to prevent double-booking. Integrates Google Calendar sync, async email workflows, and LLM-powered visit summaries. Supports patient, doctor, and admin portals with JWT RBAC and OAuth security.

End-to-end ETL and analytics platform for IoT sensor telemetry with SQL-driven insights and KPI dashboards.

A data analytics platform for processing IoT sensor telemetry through an end-to-end Python ETL pipeline. Handles data ingestion, validation, deduplication, and rejected-record logging before loading data into a normalized MySQL schema. Advanced SQL analytics and a Streamlit dashboard provide sensor KPIs, trends, anomalies, and data-quality insights.

Multi-factor financial anomaly detection and risk analysis platform with interactive dashboards.

A financial analytics system that ingests, transforms, and validates structured financial data to perform multi-factor anomaly detection and risk scoring. Extracts relevant market signals and presents risk patterns through interactive Streamlit dashboards with drill-down analysis and narrative insights.