Senior .NET Developer (Docker/Kubernetes)

Overview

Permanent, Full-Time, Hybrid

Connecting clients to markets – and talent to opportunity.

With 4,300 employees and over 400,000 retail and institutional clients from more than 80 offices spread across five continents, we’re a Fortune-100, Nasdaq-listed provider, connecting clients to the global markets – focusing on innovation, human connection, and providing world-class products and services to all types of investors.

At StoneX, we offer you the opportunity to be part of an institutional-grade financial services network that connects companies, organizations, and investors to the global markets ecosystem. As a team member, you'll benefit from our unique blend of digital platforms, comprehensive clearing and execution services, personalized high-touch support, and deep industry expertise. Elevate your career with us and make a significant impact in the world of global finance.

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.

Technology Ecosystem:

• Languages & Frameworks: C#, .NET Core, ASP.NET 
• Architecture: Microservices, Event-driven (Kafka, AMQ), CQRS 
• Cloud & Infra: Azure, Kubernetes, Docker, Rancher 
• Databases: MS SQL Server (T-SQL), NoSQL (a plus) 
• Tooling: Git, Visual Studio, CI/CD pipelines (TeamCity), Octopus, Grafana

Responsibilities

Position Purpose:  This role is ideal for a seasoned .NET engineer who thrives on ownership, enjoys mentoring others, and wants to work on robust APIs that power real trading - including authentication, pricing, order handling, and more. 

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. 

Primary Duties Will Include:

• Develop highly performant solutions using the latest .NET technologies. Build performant, scalable backend services from scratch, or improve existing ones.
• Build applications from scratch or pick up existing applications and modify them to meet business or technology needs. 
• Tackle live production challenges - debug, diagnose, and solve with confidence.
• Design and build APIs and backend logic to support high-volume trading systems. 
• Work closely with team leads and stakeholders to shape features and architecture. 
• Write clean, testable code with a TDD/BDD-first approach. Strong focus on solution design, performance, and scalability. 
• Support and mentor junior engineers in the team. 
• Participate in code reviews, design sessions, and agile ceremonies. 
• Continuously explore and evaluate new technologies that could enhance the platform. 
• Maintain an appropriate level of competence through ongoing training, making requests for updates or development as required. 

Qualifications

To land this role you will need:

• 5+ years of experience in backend .NET/C# development.
• Solid grasp of .NET Core, RESTful APIs, multithreading, and system performance .
• Experience using Kubernetes or Docker – it’s a must! 
• Experience working with high-traffic APIs and messaging systems like ActiveMQ.
• Good SQL Server/T-SQL knowledge; NoSQL is a plus. 
• Familiarity with CI/CD, agile practices, and DevOps tools (TeamCity, Octopus). 
• Strong communication skills and the ability to collaborate across teams. 
• A growth mindset and eagerness to stay current with industry trends.
• Experience with financial systems or real-time data? Big bonus. 

Education / Certification Requirements:

• Bachelor's degree in Computer Science, Software Engineering, or equivalent experience 

Working Environment:

• Hybrid - private parking for employees.
• FTE (UoP).

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