Senior Software Engineer

Senior Software Engineer £800/day Inside IR35 Contract London - 3 Days Onsite

Industry: Commodity Trading

Location: London - 3 Days Onsite

Job Type: Contract

Our client is a global commodity trading organisation undergoing a major technology transformation focused on AI-driven engineering, operational automation and modernisation of legacy trading platforms. They are seeking a strong hands-on technologist to join a high-profile AI and agent-driven programme focused on automating support and engineering workflows across the trading technology estate, including EOS-related workflows.

This role is suited to engineers who enjoy solving complex technical problems, rebuilding legacy workflows using modern technologies and working across software engineering, cloud infrastructure and AI tooling.

What You'll Be Doing

• Design and build scalable cloud-native applications and operational tooling.
• Develop AI and agent-driven solutions to automate engineering and support workflows.
• Build backend services, APIs and distributed systems.
• Modernise legacy platforms using contemporary engineering practices.
• Work across software engineering, infrastructure and platform initiatives.
• Contribute to architecture, engineering standards and platform transformation projects.

Requirements Essential

• Hands-on software engineering experience.
• Strong experience with Python, C#/.NET, TypeScript or C++.
• Strong AWS and cloud-native engineering experience.
• Experience with Docker, Kubernetes and event-driven architectures.
• Strong backend engineering and API development experience.
• Experience building scalable distributed systems.
• Strong engineering mindset with a passion for modern technologies and AI tooling.

Highly Desirable

• Commodity trading, energy trading or ETRM exposure.
• Experience with AI/LLM tooling including LangChain, Langfuse or Claude Code.
• Experience modernising legacy systems and workflows.
• Experience with React, Next.js, PostgreSQL, MongoDB or Kafka.