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Rajat Khandelwal

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descriptionEXAM PARSER

Exam Parser Pipeline

Production-Grade PDF Parsing

Production-grade ingestion pipeline that parses competitive exam PDFs into structured, validated JSON data. Employs a robust multi-stage flow with automated visual/text segmenting, self-correcting Pydantic validation, and bounding-box diagram extraction.

Architecture Snapshot

  • 9-stage sequential pipeline architecture isolates AI logic to a single parser stage.
  • Self-correction loop catches Pydantic validation errors and requests LLM retries with traceback.
  • Union merge coordinate cropping extracts visual math, chemistry, and diagram sub-regions.
  • Factory provider layer decouples system code from LLM vendors (Gemini, Qwen, DeepSeek, local).
Python 3.11PyMuPDFPydantic v2GeminiDeepSeekTesseract OCRuv
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hubENTERPRISE

RAG Playground

Interactive RAG Pipeline

Interactive web application demonstrating the complete Retrieval-Augmented Generation pipeline with visual stage-by-stage exploration. Experiment with document processing, embeddings, vector search, and AI generation.

Architecture Snapshot

  • 9-stage RAG pipeline: Ingestion → Preprocessing → Chunking → Embedding → Indexing → Retrieval → Reranking → Generation → Evaluation.
  • Multi-provider support: Google Gemini, OpenAI embeddings (768/1536/3072-dim) and GPT/Gemini/Groq LLMs.
  • Dual storage: Supabase S3 cloud with local fallback, Qdrant vector DB with HNSW indexing.
  • Real-time visual pipeline with React Flow, comprehensive logging, and evaluation metrics.
Next.js 16FastAPIQdrantOpenAIGeminiReact FlowZustandPython 3.11
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hubENTERPRISE

Capstone Project - Enterprise Assistant

Agentic AI Platform

Enterprise assistant that routes user intent across RAG, tool automation, and RFP drafting in one LangGraph-based workflow.

Architecture Snapshot

  • Supervisor node routes requests to RAG, Tool, RFP, or Upload flows.
  • Dual retrieval stack supports FAISS (local) and Qdrant (cloud).
  • Tool layer reads open incidents and service requests from SQLite.
  • Unified logging with request_id traceability across UI and graph nodes.
LangGraphStreamlitRAGFAISS/QdrantSQLiteLangChain
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MobiKwik Lendbox XTRA P2P NBFC Scam Tracker

Community Evidence Platform

Community-driven evidence collection platform for tracking financial issues. Features complaint submission with evidence upload, admin moderation, and public transparency dashboard.

Architecture Snapshot

  • Next.js 14 frontend with Supabase PostgreSQL backend and Row Level Security.
  • Google OAuth authentication with role-based admin access control.
  • Cloudflare R2 storage with automatic WebP conversion and compression.
  • Block-level CMS for content management and community updates.
Next.js 14TypeScriptSupabasePostgreSQLCloudflare R2Google OAuth
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