Senior Software Engineer

Senior Software Engineer (EMS/OMS) - Commodity Trading - London - Contract (Outside IR35) or Perm

Cititec has partnered with an elite commodities trading firm seeking their next hire to join a small, high-ownership team. The team are building a next-generation execution and order management platform.

About the Role

You will help design and build core components of a modern EMS/OMS platform, including order routing, lifecycle management, venue connectivity, and execution workflows. The system is being built from the ground up as a cloud-native platform. This is a hands-on engineering role with real ownership from design through to production.

What You’ll Do

• Design and implement core execution and order management services
• Build and maintain FIX protocol integrations with exchanges, brokers, and liquidity providers
• Develop low-latency, production-grade trading infrastructure
• Work directly with traders, quants, and risk engineers to translate trading workflows into robust systems
• Ensure production reliability through observability, testing, and operational ownership
• Collaborate on risk and pre-trade controls, position tracking, and post-trade flows

Experience required

• You'll have strong experience building EMS/OMS systems
• Hands-on experience in C++, Rust, or Python
• Practical experience with FIX protocol
• Experience with commodities is ideal