This range is provided by Referment. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Overview

Referment is working with a leading global trading firm that is looking to hire a Senior C# Developer to join its high-performing technology team in London. This role offers the chance to work on a range of front-office trading systems that support physical and financial commodity desks across global markets.

As a senior engineer, you’ll play a key role in designing and developing scalable, high-performance applications used daily by traders, quants, and risk analysts. The team operates in a highly agile environment, and you’ll have the opportunity to contribute to both technical direction and hands-on development across critical systems.

Responsibilities

• Design, develop, and maintain enterprise-level trading applications using C#/.NET
• Build and enhance tools used by front-office trading desks across commodities markets
• Partner with traders, analysts, and other developers to gather requirements and deliver robust software solutions
• Ensure system reliability, performance, and scalability in a high-volume environment
• Contribute to architecture and design decisions, and mentor junior developers where appropriate
• Integrate with internal and external data feeds, APIs, and trading platforms
• Support modern development practices, including CI/CD and automated testing

What We're Looking For

• 7+ years of experience in C#/.NET software development
• Experience working in a front-office or trading environment, ideally within financial services or commodities
• Strong understanding of object-oriented programming, multithreading, and performance optimisation
• Solid experience with SQL Server and messaging systems such as RabbitMQ or Kafka
• Comfortable working in a fast-paced, agile environment and engaging directly with business users
• Familiar with version control, CI/CD pipelines, and modern software development practices

Desirable Experience

• Exposure to energy or commodities markets
• Knowledge of cloud services (preferably Azure)
• Experience with scripting languages such as Python

Why Apply?

This is a fantastic opportunity to join a technology-led organisation where software development is central to business success. You’ll work alongside highly skilled professionals on complex challenges, using the latest technologies in an environment that values innovation and collaboration.

Job Details

• Seniority level: Mid-Senior level
• Employment type: Full-time
• Job function: Information Technology
• Industries: Software Development, Financial Services, and IT Services and IT Consulting

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