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David Kopstain is a Senior Developer at XR Trading since May 2019. Prior to their current role, David was a Lead Developer at Clear Capital Group Technologies, LLC from April 2015 to May 2019. Before that, David served as a Software/Systems Architect at Trading Technologies from August 2009 to April 2015. David also has experience as a Developer/Architect at Citadel LLC, a Senior Software Developer at TD Options, and as a Developer/Developer Support at Citadel LLC.