Senior Staff Engineer

Overview 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 Corporate: 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. Responsibilities Position Purpose This role is ideal for an experienced .NET engineer who thrives on ownership, having knowledge and experience in using .NET ecosystem, knowing the newest trends, be up to date with the newest .NET technology, and wants to work on robust APIs that power real trading - including authentication, pricing, order handling, and more, high loads, low latency systems. You’ll be an essential part of a highly skilled product team, collaborating with other engineers, tech leads, and QAs to build scalable, high-performing systems used by thousands of clients. Techology Ecosytem Languages & Frameworks: C#, .NET Core, ASP.NET Core Architecture: Microservices, Event-driven (Kafka, AMQ), CQRS Cloud & Infra: Azure, Kubernetes, Docker, Rancher, TeamCity, Octopus, Grafana, Grafana Databases: MS SQL Server (T-SQL), NoSQL, Postgres Tooling: GitHub, Visual Studio/Rider, ReSharper AI Tools: MS Copilot, GitHub Copilot, ChatGPT Primary duties will include: Design and develop low-latency solutions using the latest .NET technologies. Build performant, scalable backend services from scratch, or improve existing ones Tackle live production challenges Participate in code reviews, design sessions, and agile ceremonies Work closely with team leads and stakeholders and other teams across company Continuously explore and evaluate new technologies that could enhance the platform Qualifications To land this role you will need: 3–5+ years of experience in backend .NET/C# development Solid grasp of .NET Core, APIs (high-load - a plus) multithreading and performance Experience with messaging systems like ActiveMQ, Kafka Hands on experience with Kubernetes Experience with financial systems or real-time data? Big bonus. Good SQL knowledge; NoSQL is a plus Strong communication skills and the ability to collaborate across teams A growth mindset and eagerness to stay current with industry trends Education Bachelor's degree in Computer Science, Software Engineering, or equivalent experience Having certifications in related areas is a plus What We Offer Work on mission-critical systems used globally Ownership, and room to grow technically and personally A collaborative team of talented engineers Hybrid work flexibility Office perks, private parking, and professional development support