Ryan Sheftel is a veteran quantitative trading executive with over two decades of experience building and running systematic trading, market making, and electronic execution businesses across rates, mortgages, crypto and digital assets. Currently Head of Trading at Element Capital, he previously served as a Partner at GTS and led global rates quantitative trading and eCommerce at Credit Suisse, and founded the systematic hedge fund Malbec Quantys. A hands-on builder who combines trading desk leadership with engineering rigor, he contributes testing and calendar tooling to open-source finance projects like pandas_market_calendars. Based in New York, he blends deep market microstructure expertise with product-focused automation, and maintains a technical blog where he writes about markets and systems.
11 years of coding experience
4 years of employment as a software developer
M&T Finance Systems Engineering, M&T Finance Systems Engineering at University of Pennsylvania
Exchange calendars to use with pandas for trading applications
Role in this project:
Back-end Developer & QA Engineer / Test Automation Engineer
Contributions:30 releases, 4 reviews, 252 commits in 5 years 11 months
Contributions summary:Ryan's initial commit introduced several test files for the project. Subsequent commits demonstrate the development of testing infrastructure and unit tests to validate the functionality of the exchange calendars. The user focused on creating tests, which include testing the core functionality of the Exchange Calendar base class and implementing tests for each Exchange class. The user demonstrated knowledge in Pandas and date related functionality, especially in a financial context.
Contributions:1 release, 145 commits, 6 PRs in 6 years
polarspythondataframesdataframedata-processing
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