🎓 Mathematics graduate from Aristotle University of Thessaloniki
🤖 Focused on AI systems, LLM applications, Retrieval-Augmented Generation (RAG) and Data Analytics

• Climate Energy Hybrid Assistant Enterprise-style AI assistant for climate and energy intelligence featuring structured analytics, RAG, hybrid retrieval, conversational memory, and local LLM orchestration using Qwen + Ollama. Built with FastAPI, React, ChromaDB, LangChain, and Docker.

👉 https://github.com/dimitrisl99/climate-energy-hybrid-assistant

• Hybrid RAG Chatbot
  Retrieval-Augmented Generation system combining BM25 and dense embeddings with RRF fusion, cross-encoder reranking, and IR evaluation (Hit@K, MRR) 👉 https://github.com/dimitrisl99/hybrid-rag-chatbot

• LLM Fine-tuning Project
  Fine-tuning pretrained models using LoRA
  👉 https://github.com/dimitrisl99/lora-llm-statistics-finetuning

• AI Receipt Analyzer
  OCR + ML pipeline for expense extraction and analysis
  👉 https://github.com/dimitrisl99/ai_expense_receipt_analyzer

• Review Rating Prediction NLP pipeline using TF-IDF and linear models (SVM, Logistic Regression) for rating prediction and sentiment analysis 👉 https://github.com/dimitrisl99/review-rating-prediction

• Retail Business Analytics
  Retail analytics project using SQL and Power BI. 👉 https://github.com/dimitrisl99/Retail_Business_Data_Analytics

• Student Performance Analysis
  Student performance analytics using SQL (PostgreSQL) and Power BI 👉 https://github.com/dimitrisl99/Student-Performance-SQL-PowerBI

• Python, SQL
• Machine Learning, NLP, LLMs
• RAG, FAISS, Fine-tuning (LoRA), Text-to-SQL
• HuggingFace, LangChain
• PowerBI , Microsoft Office

• GitHub: https://github.com/dimitrisl99
• LinkedIn: www.linkedin.com/in/dimitris-loukakis-500645233
• e-mail: jimylouk@hotmail.com