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Denzell Twerdohlib.dev

Projects

I’m documenting work with a bias toward quant dev skills: clean APIs, reproducible experiments, and explicit assumptions.

Event-Driven Backtest Engine

A shipped, correctness-first event-driven backtesting engine in TypeScript: deterministic replay, explicit execution assumptions, testable boundaries.

Shipped
TypeScriptBacktestingArchitecture
  • Clear interfaces for strategies + execution models
  • Deterministic testing with fixtures
  • Focus on correctness before speed

Market Microstructure Notebook

Notes + small experiments: spreads, order book dynamics, slippage, and common execution metrics.

WIP
MicrostructureExecutionResearch
  • Defines metrics (spread, effective spread, realized spread)
  • Small simulations to compare naive vs TWAP-like execution

Vol Surface Playground

A small interactive demo: implied vol smile inputs → interpolated surface → Greeks (later).

WIP
OptionsMathVisualization
  • Simple UI and charts
  • Emphasis on explaining assumptions