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Application Support Specialist

Group One · Prop trading & market making · Chicago · Mid-level · Posted 24 Sep 2026

Apply now → Applications go to Group One's own site.

We are seeking a self-driven Application Support Specialist who is passionate about all aspects of application support; including documentation, training, troubleshooting, and customer service. The position will be part of our Application Support team. The Application Support Specialist will work closely with our Software Development and Quality Assurance teams. We desire a candidate with strong problem-solving, critical thinking and communication skills who can collaborate across functional groups.

The focus of this position will be the hands-on support for users of our internally developed trading software. Our software includes an information-dense user interface, a high-throughput, low latency parallel computational core, server components, interfaces to exchanges, market data sources, and execution systems. The ideal candidate will participate in oversight of application monitoring, troubleshooting and process improvement.

 Requirements:

 

About Group One:

Group One is a leading specialist and market maker in equity options. With over 25 years since our founding, Group One has grown into one of the largest, privately held options trading firms in the United States. We maintain a floor presence in Chicago, New York, San Francisco and Philadelphia and we have specialist posts in New York and Chicago. 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 software development team provides a diverse set of software for electronic trading, quoting, and trade analysis that is the lifeblood of our business.

We offer competitive compensation including a performance-based bonus and comprehensive benefits, paid vacation, fresh fruit and snacks daily, casual dress environment, social events, and more!

 

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