atoussi ouais
Machine Learning Engineer
Competenze
Consulta i miei servizi

Portfolio
Esperienza lavorativa
Machine Learning Engineer (Freelance)
Freelancer.com • Lavoratore autonomo
Mar 2024 - Present • 2 yrs 2 mos
Building end-to-end machine learning pipelines for time series forecasting and classification problems. Key project: Polypropylene futures price forecasting model using Walk-Forward XGBoost with 36-month rolling window validation. Results on unseen test data: - R² = 0.80 - MAE = 178 CNY/ton (2.3% average error) - 87.5% coverage inside 95% confidence interval - Deployed as interactive Streamlit dashboard Technical stack: Python, XGBoost, Optuna, Streamlit, Plotly, Pandas, Scikit-learn, yfinance, FRED API Delivered: full source code, predictions CSV, feature importance analysis, confidence intervals, live dashboard deployment.