Quantitative Strategy R&D Engineer at Beijing Youcheng Qidian Technology Co., Ltd.

Built predictive models for financial time-series forecasting using Python and MySQL. Applied machine learning methods to trading data, achieving ~10% monthly returns during the test phase. Developed backtesting frameworks for evaluating strategy robustness across historical datasets. Performed feature engineering, risk analysis, and parameter optimization to improve strategy performance. Delivered reproducible, well-documented code and collaborated with cross-functional teams.