About Sergio
Portuguese
Native or bilingual
English
Fluent
Experience
- Personal ProjectMachine Learning EngineerJanuary 2026 - April 2026 (3 months)Machine Learning Engineer (Freelance / Independent)Self-initiated project | 2024 – PresentDesigned and built an end-to-end machine learning system for predicting ATP match outcomesEngineered 40+ temporal features (Elo ratings, fatigue, surface performance) from historical sports dataTrained and optimized LightGBM models using Optuna, achieving strong probabilistic calibration (0.96 slope)Implemented walk-forward validation on 50k+ samples to simulate real-world deploymentConducted financial backtesting to evaluate model performance under different market regimesIdentified and quantified alpha decay in efficient markets, with divergence between sharp and soft bookmakersDeveloped a live inference API using FastAPI and deployed an interactive interface (Gradio)Built monitoring components for model drift and retraining triggers
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Education
- High School DiplomaRaffles American SchoolHigh School Diploma
- Enrolled StudentReed College (Physics major)Incoming Student