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RizosConstantinos/README.md

Hi there, I'm Constantinos Rizos 👋

Data Scientist & ML Engineer | M.Sc. in DS & ML | Quality Assurance Professional | Azure AI Certified

I am a Data Science and Machine Learning professional with a unique background in High-Precision Systems Engineering and Quality Assurance within the Hellenic Air Force. I specialize in transforming complex data into actionable business insights and building scalable, production-ready AI solutions.

🚀 Featured Projects

1. Customer Churn Intelligence System

Production-Ready Churn Prediction System

  • Problem: Businesses losing up to €2M+ annually due to customer attrition.
  • Solution: An end-to-end ecosystem featuring XGBoost (0.87 Recall), SHAP explainability, and a FastAPI/Streamlit deployment.
  • Impact: Real-time risk assessment and financial ROI simulation via Power BI.

2. AI-Driven Real-Time Occupancy Tracker

AI_Driven_Occupancy_Tracker_System

  • Problem: The need for automated, high-accuracy monitoring and occupancy management in restricted facilities.
  • Solution: An end-to-end Computer Vision pipeline using OpenCV DNN, Centroid Tracking, and vector-based movement analysis for bi-directional counting.
  • Impact: Optimized for Edge AI (Raspberry Pi) deployment, providing real-time "Grand Total" synchronization and automated facility oversight.

🛠 Tech Stack & Expertise

  • Languages & Frameworks: Python, SQL, OpenCV, FastAPI, Streamlit, Scikit-learn, XGBoost.
  • AI & Computer Vision: Object Detection, Centroid Tracking, Deep Neural Networks (DNN), SHAP (Explainable AI).
  • Data Engineering: Data Architecture, ETL Pipelines, EDA, Edge AI Deployment.
  • Visualization: Power BI, Tableau, Matplotlib, Seaborn.
  • Operations & Systems: MLOps, Azure AI (Certified), Quality Assurance & Control, Technical Upgrade Management.

📊 Professional Background & Education

  • M.Sc. in Data Science & Machine Learning | Hellenic Open University (2025)
  • B.Sc. in Electrical, Electronics & Communications Engineering | Hellenic Air Force Academy
  • Experience: 7+ years in the Hellenic Air Force, managing mission-critical avionics (F-16 Viper) and leading Quality Assurance audits for high-tech systems.
  • Certified: Microsoft Azure AI Fundamentals.

📬 Connect with me:

"Leveraging precision engineering principles to build robust AI systems."

Pinned Loading

  1. customer-churn-end2end customer-churn-end2end Public

    End-to-End Customer Churn Prediction System | XGBoost + SHAP | FastAPI Backend | Streamlit UI | Power BI Analytics | Production-Ready ML Pipeline

    Jupyter Notebook 3

  2. AI_Driven_Occupancy_Tracker_System AI_Driven_Occupancy_Tracker_System Public

    An end-to-end AI-powered system for real-time human detection and occupancy tracking using Computer Vision (OpenCV) and Deep Learning. Features automated counting and entry/exit monitoring.

    Python 1