🎓 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-grade AI assistant for climate and energy intelligence combining structured analytics, advanced RAG, hybrid retrieval, conversational memory, interactive visual analytics, PDF report generation and local LLM orchestration. Built with FastAPI, React, ChromaDB, LangChain, Ollama, Recharts 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