Intelligent Resume Analysis System: A RAG Technology-Based AI Resume Parsing and Q&A Platform

This article introduces an intelligent resume analysis system that integrates traditional machine learning and large language models, enabling automatic PDF resume parsing, intelligent classification, and RAG-based interactive Q&A functions. The system aims to address the pain points of time-consuming and error-prone resume screening in recruitment processes. Through a modular architecture combined with various AI technologies, it provides efficient solutions for corporate recruitment, headhunting services, and job seekers.

In human resource management and recruitment processes, traditional manual resume screening is inefficient and prone to missing talent due to subjective factors. With the maturity of NLP and RAG technologies, automated resume analysis systems have become important tools in the industry. This project combines traditional machine learning classification with cutting-edge large language model technologies to build a comprehensive platform that quickly classifies resumes and intelligently answers content-related questions.

The system adopts a modular architecture with core components including:

1. Document Parsing Layer: Uses PyMuPDF to extract PDF text;
2. Text Preprocessing and Classification: TF-IDF feature extraction + LinearSVC classification model;
3. Semantic Embedding and Vector Storage: Generates vectors using HuggingFace SentenceTransformers and stores them in ChromaDB;
4. RAG Pipeline: Groq LLM combined with LangChain to orchestrate retrieval and generation processes;
5. Interactive Interface: Builds the web interface using Streamlit.

The system's core functions include:

1. PDF Resume Upload and Parsing: Automatically extract text (personal information, work experience, etc.);
2. Intelligent Classification: Classify resumes into job categories using a pre-trained TF-IDF + LinearSVC model;
3. RAG-Driven Q&A: Support natural language questions (e.g., candidate experience, skill matching) and generate accurate answers by retrieving relevant resume fragments.

Project highlights:

1. Multi-Technology Integration: Combines traditional machine learning (TF-IDF + SVM), deep learning embedding, vector database, and large language model to leverage the strengths of each technology;
2. Modular Code: Clear directory structure (app, models, notebooks, etc.) for easy maintenance and expansion, reflecting good software engineering practices.

System application scenarios include:

1. Corporate Recruitment: Reduce HR's initial screening workload, quickly classify resumes and get answers about candidates;
2. Headhunting Services: Build a queryable candidate database and use semantic search to match suitable talent;
3. Job Seeker Self-Analysis: Understand resume classification results and test information completeness and expression clarity.

The system has the following improvement directions:

1. Multilingual Support: Currently mainly supports English resumes; needs to expand to Chinese and other languages;
2. Table and Layout Parsing: Introduce models like LayoutLM to handle tables and columns in PDFs;
3. Real-Time Learning: Add an online learning mechanism to optimize model performance;
4. Privacy Protection: Strengthen data encryption and access control to protect sensitive information.

This system demonstrates the organic combination of traditional machine learning and modern large language model technologies, serving as a fully functional application system. For developers, it provides a reference for layered design (lightweight models for classification, RAG+LLM for Q&A), ensuring both efficiency and intelligence. Future improvements can be expected in accuracy, multimodal understanding, personalized recommendations, and other aspects.