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Group One Trading Tech Stack

Proprietary options trading firm with in-house risk and compliance tech

Financial Services Chicago, Illinois 51–200 employees Founded 1989 Partnership
group1.com LinkedIn

Group One is a Chicago-based proprietary trading firm focused on US equity options market-making, built on a Windows/Azure infrastructure with Python, C#, and Java. The hiring spike is compliance-heavy (4 open roles across directors and interns), paired with active projects in trade surveillance, detection algorithms, and regulatory frameworks—a pattern that suggests either a regulatory examination cycle or deliberate compliance infrastructure buildout to scale market-making operations.

Tech Stack 21 technologies

Core StackActive Directory Azure AD SQL Server Python C# Pandas .NET Java C++ Windows 10 Windows 11 Azure Exchange Online VMware vSphere PowerShell Entra DHCP DNS VBA Polars Objective-C

What Group One Trading Is Building

◆Challenges

  • Managing regulatory examinations
  • Vendor management for compliance systems
  • Streamlining operations
  • Optimizing operations processes
  • Balancing compliance with growth
  • Vendor relationship management
  • Reducing false positives
  • Improving detection effectiveness
  • Ensuring data feed accuracy

▲Active Projects

  • Streamlining operations
  • Compliance framework development
  • Regulatory examination coordination
  • Vendor management for compliance systems
  • Trade surveillance application development
  • Automated surveillance dashboards
  • Custom detection algorithm development

Hiring Activity

Accelerating10 roles · 8 in 30d

Department

Compliance
4
Finance
3
Data
1
Engineering
1
Ops
1

Seniority

Director
3
Intern
3
Junior
2
Mid
2
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About Group One Trading

Group One operates as a proprietary trading partnership since 1989, making markets in US equity options through in-house risk management and software development. The firm employs 51–200 people across Chicago, with a technical stack spanning Windows/Azure cloud, SQL Server databases, and polyglot engineering (Python, C#, Java, C++). Beyond trading desk operations, the company is actively developing trade surveillance applications, custom detection algorithms, and automated dashboards—indicating an internal compliance and risk infrastructure that rivals many regulated financial service providers.

HeadquartersChicago, Illinois
Company Size51–200 employees
Founded1989
Hiring MarketsUnited States

Frequently Asked Questions

What tech stack does Group One Trading use?

Windows 10/11, Azure, SQL Server, Python, C#, Java, C++, .NET, Pandas, Polars, and legacy VBA. Infrastructure runs on Azure AD, VMware vSphere, with Active Directory for identity management.

Where is Group One Trading headquartered?

Chicago, Illinois. All current hiring is focused in the United States.

How this profile is built

Group One Trading's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →

This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.