Saad R

Machine Learning Engineer | AI & NLP Specialist

Self-Employed / Freelance • Trabajador autónomo

May 2025 - Present • 1 yr

Worked as a self-employed Machine Learning Engineer providing AI-driven solutions through project-based and freelance work. Built and delivered machine learning, NLP, and deep learning solutions tailored to real-world business needs. Key responsibilities and achievements include: Developed end-to-end machine learning models for prediction, classification, and data analysis Built NLP pipelines for text classification, sentiment analysis, and information extraction Implemented deep learning models using PyTorch and transformer-based architectures Designed and tested LLM-based solutions such as chatbots and document Q&A systems Performed data preprocessing, feature engineering, and model evaluation Delivered clean, well-documented, and reusable code with clear explanations

AI Engineer & Automation Specialist

Upwork • Trabajador autónomo

May 2024 - Present • 2 yrs

Built and deployed production-ready AI systems for clients across multiple industries. Specialized in agentic AI architectures, LLM-powered automation, and RAG-based knowledge systems. Key projects delivered: - 6-agent autonomous job application system — analyzes job postings, tailors resumes, generates cover letters, and drafts emails using Gemini API, FAISS memory, FastAPI backend, and Streamlit UI - RAG-powered document chatbot serving 10K+ daily queries with 92% user satisfaction using LangChain and Pinecone - Multi-agent workflow automation reducing client manual processing time by 70% across enterprise workflows - LLM prompt optimization pipeline cutting API costs by 40% while maintaining output quality across production models - Document intelligence system extracting structured data from 1000+ PDFs and contracts daily using Python and FastAPI Tech stack: Python, LangChain, LlamaIndex, FastAPI, OpenAI GPT-4, Anthropic Claude, Google Gemini, FAISS, Pinecone, Chroma, Streamlit, Docker, AWS, PostgreSQL, Redis