Freelancers using LangChain in Cape Town
Freelancers using LangChain in Cape Town
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Wayne Fourie
Cape Town, South Africa
Senior AI & Software Engineer | LLM/RAG, Computer Vision
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Senior AI & Software Engineer | LLM/RAG, Computer Vision
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Agentic RAG Pipeline Created an intelligent email triage system that classifies incoming emails and generates context-aware draft responses using retrieval-augmented generation. The LangChain agent uses tools to search a knowledge base, check customer history, and apply escalation rules. Key features: - 7-category classification with 4 priority levels - Tool-augmented LLM agent for dynamic information retrieval - Vector knowledge base storing policies, FAQs, and response templates - Structured output with confidence scores and routing recommendations Tech: Python, LangChain, GPT-4o, ChromaDB, OpenAI Embeddings, Pydantic
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Built an intelligent document extraction engine that automatically parses invoices using GPT-4 Vision. The system extracts 15+ field types (vendor info, line items, totals, dates) with 93.5% accuracy and includes confidence scoring for each field. Key features: - Multi-modal LLM processing for PDF, images, and scanned documents - Cross-validation logic that catches extraction errors by comparing line totals vs subtotals - Async batch processing for high-volume workflows - Pydantic schemas for type-safe, structured output Tech: Python, GPT-4 Vision, LangChain, Pydantic, FastAPI
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Built an intelligent document extraction engine that automatically parses invoices using GPT-4 Vision. The system extracts 15+ field types (vendor info, line items, totals, dates) with 93.5% accuracy and includes confidence scoring for each field. Key features: - Multi-modal LLM processing for PDF, images, and scanned documents - Cross-validation logic that catches extraction errors by comparing line totals vs subtotals - Async batch processing for high-volume workflows - Pydantic schemas for type-safe, structured output Tech: Python, GPT-4 Vision, LangChain, Pydantic, FastAPI
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CamBridge - Camera Middleware Engineered a protocol translation layer that bridges Chinese IP cameras (Hikvision, Dahua) with professional NVR platforms like Milestone and Genetec. The middleware abstracts vendor-specific protocols into a unified interface for stream management and event processing. Key features: - Protocol handlers for Hikvision ISAPI, Dahua, and generic ONVIF - Real-time event subscription (motion, line crossing, face detection) - RTSP stream discovery and proxy configuration - 24/7 health monitoring with automatic stream loss detection Tech: Python, asyncio, aiohttp, RTSP, ONVIF, ISAPI, FFmpeg
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