Senior C# .NET Developer (Financial Markets / Risk Platform) (41662) at DeARX Services (Pty) Ltd

We're hiring an exceptional Senior C# .NET Engineer to join a highly specialized team building a world-class trading, pricing, and risk platform for global markets. This is a chance to build real-time systems that power trading desks, market risk, and credit teams systems where performance, reliability, and precision matter.

If you're passionate about complex problem-solving, clean architecture, and seeing your code directly impact global financial markets, this role was built for you.

What you'll be building:

• Pricing & risk engines used by trading desks and risk officers
• High-performance microservices, REST APIs, and distributed systems
• Client applications (WPF), web portals (Blazor), and Excel DNA integrations
• Cloud migrations to AWS (were scaling fast)
• Complex scheduling, orchestration, monitoring, and alerting systems

Why this role is different:

• Direct impact: What you build gets used daily by market makers, traders & risk managers.
• High autonomy: Youll be part of a senior, collaborative team where your input shapes architecture & design.
• Real complexity: Large-scale, real-time financial data systems with millions of calculations daily.
• Cutting-edge stack: C# .NET 8, Blazor, WPF, REST APIs, AWS, DevOps pipelines, TDD.
• Elite environment: Surrounded by sharp, like-minded engineers passionate about clean code, elegant design, and systems that just work.

What we're looking for:

• 7+ years of professional C# .NET development experience.
• Mastery of object-oriented design, SOLID principles, and design patterns.
• Strong experience with RESTful APIs, microservices, and distributed systems.
• Skilled with DevOps automation, CI/CD pipelines, and monitoring.
• Excellent problem-solving skills and attention to detail.
• Comfortable working directly with business stakeholders to shape solutions.
• Agile development experience.

Bonus points if you have:

• Financial services / trading / risk system experience
• AWS experience (migrations, serverless, compute scaling)
• Messaging protocols (Kafka, RabbitMQ)
• Excel DNA (or Excel Add-ins development)

Sample screening questions we may explore:

• Explain SOLID principles in your own words.
• How would you design an immutable system in C#?
• Describe how you use generics effectively in .NET.