Principal Engineer - Software Development (.NET + AI)

Permanent, full-time, hybrid

Connecting clients to markets – and talent to opportunity

With 5,400+ employees and over 80,000 institutional, commercial, and payments clients, we operate from more than 80 offices spread across six continents.

As a Fortune 100, Nasdaq-listed provider, we connect clients to the global markets – focusing on innovation, human connection, and providing world-class products and services to all types of investors.

Whether you want to forge a career connecting our retail clients to potential trading opportunities, or ingrain yourself in the world of institutional investing, StoneX Group is made up of four business segments that offer endless potential for progression and growth.

Business Segment Overview: Engage in a deep variety of business-critical activities that keep our company running efficiently.

From strategic marketing and financial management to human resources and operational oversight, you’ll have the opportunity to optimize processes and implement game-changing policies.

Position Purpose: We are seeking a highly accomplished Principal Engineer to play a pivotal role in shaping the architecture, innovation, and engineering excellence of our Client Onboarding platform.

This role is suited for a strategic thinker and hands-on technologist who is eager to continuously learn, thrives in fast-paced environments, and excels at solving complex problems while balancing multiple priorities effectively.

As a Principal Engineer, you will be a key contributor to technical architecture, innovation, and the adoption of modern technologies including AI, while actively contributing to the design and development of high-performing, scalable, enterprise-grade systems.

You will be recognized as a go-to person for problem-solving, driving delivery and ensuring high-quality outcomes across initiatives.

Primary Duties will include:

• Drive innovation and adoption of modern technologies, including embedding AI/ML capabilities where appropriate.
• Provide hands-on leadership in system design and development across the full application stack.
• Effectively multi-task across initiatives, balancing strategic work with hands-on execution and delivery ownership.
• Influence and guide multiple engineering teams, ensuring alignment with architectural standards and best practices.
• Champion modernization efforts, including cloud-native architectures, microservices, and platform evolution.
• Serve as a go-to expert for complex problem-solving, debugging critical issues, and guiding teams through challenges.