projects

• —Enforced role-based access control across 8 endpoints by adding Owner/Editor/Viewer roles to a Spring Boot and React.js application.
• —Secured all endpoints with JWT-based Spring Security authentication, validated by 22 automated tests.
• —Cut API latency by 58% and raised throughput 75% by migrating large-file uploads to presigned S3 URLs, tested with k6 at 20 concurrent users.

Spring Boot · React.js · PostgreSQL · AWS S3 · JWT

• —Built a leakage-free ML pipeline on 5M+ flight records (BTS + NOAA, 15 hub airports) using point-in-time feature engineering; caught and fixed 2 real data-leakage bugs during development, backed by 9 regression tests.
• —Trained and compared XGBoost and PyTorch classifiers, improving PR-AUC 23% over a historical-rate baseline (0.320 vs 0.261) while identifying a ranking-vs-calibration tradeoff between the two models.
• —Deployed via FastAPI with MLflow experiment tracking, Docker containerization, and CI, serving both delay probability and expected delay-duration predictions.

Python · XGBoost · PyTorch · FastAPI · MLflow · Docker

• —Reduced race-time error by 68% by building a pipeline evaluating scikit-learn and XGBoost models.
• —Accelerated deployment by 40% across 9 race experiments by tracking pipelines using MLflow and SHAP.

Python · TensorFlow

• —A terminal-based chess engine in modern C++20 with full move validation, check/checkmate/stalemate detection, en passant, castling, and promotion. Supports human vs human and human vs computer play across four difficulty levels, an optional X11 graphical board, undo, custom board setup, and a countdown clock mode.

C++20 · X11