Senior Software Engineer
Posted Today by Cititec
Negotiable
Outside
Undetermined
London Area, United Kingdom
Summary: The Senior Software Engineer will play a crucial role in designing and building a next-generation execution and order management platform for a leading commodities trading firm. This hands-on position involves developing core components, ensuring production reliability, and collaborating with various stakeholders. The role offers significant ownership from design to production within a small, high-ownership team. Ideal candidates will have strong experience in EMS/OMS systems and relevant programming skills.
Key Responsibilities:
- 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
Key Skills:
- Strong experience building EMS/OMS systems
- Hands-on experience in C++, Rust, or Python
- Practical experience with FIX protocol
- Experience with commodities is ideal
Salary (Rate): undetermined
City: London
Country: United Kingdom
Working Arrangements: undetermined
IR35 Status: outside IR35
Seniority Level: undetermined
Industry: IT
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