Quantitative Strategy Developer (NinjaScript)

OPEN TO CANDIDATES WORLDWIDERole OverviewWe are looking for a Quantitative Strategy Developer to work on developing and validating systematic trading strategies. This role offers the flexibility to work remotely from anywhere, with a focus on strategy validation rather than fixed working hours. You'll be part of a team that builds and licenses trading strategies to retail clients using platforms like NinjaTrader and Charles Schwab.ResponsibilitiesPort a defined trading strategy to NinjaScript, ensuring the backtest matches a Python reference implementation.Develop a Python-based walk-forward validation framework to assess strategy performance, including in-sample vs. out-of-sample results and parameter sensitivity.Document the validation framework for usability by other team members.Engage in ongoing strategy development, contributing to the refinement and expansion of trading strategies across futures and equities.Maintain clear communication and documentation to support asynchronous collaboration across time zones.Required SkillsProven experience in building and testing systematic trading strategies, particularly in futures or equities.Proficiency in NinjaScript/C# for NinjaTrader 8 and Python for research, with familiarity in libraries such as pandas and vectorbt.Strong understanding of avoiding overfitting through walk-forward analysis and proper out-of-sample testing.Ability to model transaction costs accurately and discuss strategy capacity constraints and potential failures.Excellent written English communication skills.Nice to HaveExperience with REST APIs for broker connectivity on the equities side.Background in discussing and managing regime dependence in trading strategies.