Software Developer Intern

Group One Trading
Chicago, Illinois, United StatesPosted Sep 9, 2026
Software Engineering

About the role

Software Developer Intern Location: Chicago

The Opportunity

Group One Trading, a dynamic options trading firm, is actively seeking highly-motivated people who are interested in learning and getting hands-on experience with electronic trading systems. Our system is built on the .NET platform using C#. The system has enough variety to challenge and interest anyone: an information-dense user interface, a high-throughput, low latency parallel computational core, service-oriented architecture, and interfaces to exchanges' market data and execution systems. Who We Are We are committed to creating a diverse environment and are proud to be an equal opportunity employer. At Group One, we value transparency and collaboration coming from unique perspectives and backgrounds. We strive to create a workplace in which all employees have an opportunity to participate and contribute to the success of the business. What We Do Group One is a proprietary trading firm specializing in market making and liquidity providing strategies in options markets. Our traders provide competitive liquidity across a broad range of securities by managing portfolios of several hundred issues and simultaneously streaming quotes across multiple exchanges. Our systems and network infrastructure are vital in ensuring success. The Skill Set During this internship, you will be mentored by senior developers and gain exposure to the business of equity options trading. You will gain real-world experience with a team that develops proprietary software in an ever-changing, fast-paced, and competitive environment. A broad, multi-platform skill set will help you be successful in this role, but there will be plenty of learning opportunities no matter how many of these skills you bring in with you. We also encourage applicants with non-traditional backgrounds to apply. Must be an active student during the following Fall semester working towards a BS, MS, or Ph.D. in Computer Science, Computer Engineering, or a related

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