
Maithili D
Python Trading Strategy Coder
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Algorithmic Trading Systems Developer
Freelancing Career • Freelance
Jan 2024 - Present • 2 yrs 5 mos
Core Responsibilities & Technical Stack: Built Vectorized Engines: Developed high-speed backtesting layers using Pandas, NumPy, and SciPy. Processed multi-gigabyte historical data files without loop latency. Ran Stress-Testing: Designed Monte Carlo models with 250+ randomized paths. Mapped out drawdown risks and worst-case market scenarios for clients. Prevented Curve-Fitting: Implemented walk-forward cross-validation and Out-of-Sample (OOS) testing to ensure trading strategies work on live, unseen data. Managed Data Infrastructure: Maintained data feeds across 13 major assets, including Cryptocurrencies (BTC, ETH, SOL), Spot Metals (XAUUSD, XAGUSD), Forex, and Equity ETFs (SPY, QQQ). Created Performance Tear-Sheets: Generated color-coded optimization heatmaps, underwater drawdown charts, and monthly return matrices using Matplotlib and Seaborn.