RJO (StoneX)

R.J. O'Brien, now part of StoneX Group following its 2025 acquisition, is the oldest futures brokerage and clearing firm in the United States, founded in 1914. It serves over 75,000 institutional, commercial, and individual clients globally, offering electronic trading, 24-hour execution on major futures exchanges, and risk management solutions.

Key Achievements

• Led development of a next-gen trading platform, replacing thick desktop clients with thin web clients; delivered hybrid mobile apps for Android, iOS, and Windows.

• Consolidated and centralized all company web apps via Single Sign-On; implemented API gateways to Master Data Management to keep static data consistent across platforms.

• Built and coached teams (developers, QA, UX) and embedded agile delivery and DevOps practices; partnered closely with risk, compliance, and trading desks.

Testimonials

"Jason is an effective leader who manages many projects and keeps the operations running smoothly. Jason is a real go-forward technology professional who sees possibilities in technologies as they emerge and is not afraid to jump in with both feet. He collaborates well with many groups and departments. Jason empowers his staff to solve problems to meet the needs of the organization to increase their productivity. He is logical and optimistic and has the best communication skills. Awesome person to work for, always calm and cool no matter the urgency."

— Jorge Carrillo, Senior Product Manager