Full-Time · Quantitative Development

Senior Software Engineer - Post Trade

Old Mission · Chicago, IL, United States · $200,000 - $250,000 · Posted Aug 26, 2026

← Back to Opportunities

Old Mission is a global proprietary trading firm that leverages state-of-the-art technology and research to identify and execute profitable trading strategies across multiple asset classes around the world. Our offices in Chicago, New York, and London are all composed of naturally-curious individuals who thrive in a team environment and constantly strive for improvement. We are actively hiring a Senior Software Engineer with a passion for building reliable systems at scale. As a post-trade developer, you will coordinate solutions across a wide range of inputs, outputs, and latency requirements. You will bring proven expertise in Python and C++ to a distributed system that supports global trading across the entire firm.

Requirements

  • Bachelor's degree in Computer Science, Mathematics, or a related Engineering/Science discipline
  • A minimum of 5 years of professional Python and C++ experience in a production setting
  • Strong Linux knowledge (e.g. performance tuning, networking)
  • Comfortable working with relational databases (e.g. PostgreSQL,MySQL, etc.)
  • FIX experience (e.g. execution management, market data, drop copy)
  • Exceptional written and verbal communication skills
  • A collaborative team player with a knack for owning and driving exciting projects
  • Thrives in a fast-paced work environment, showcasing effective problem-solving abilities
Apply on Old Mission's site