C# Developer

Location: Central London (Hybrid)Package: £140,000 - £175,000 Department: Trading Technology / Front & Middle Office Platforms

We're an energy trading business building the next generation of pricing, risk, and scheduling platforms as we expand into power and environmental products (PPAs, Guarantees of Origin, carbon certificates) alongside our core gas/LNG activities. You'll join a tight-knit engineering team that ships high-impact software used by traders, schedulers, and risk analysts every day.

If you enjoy solving real-time systems challenges, writing clean C# in cloud-first architectures, and partnering with the desk, this role is for you.

• Design & build resilient C#/.NET services and APIs powering pricing, market data ingestion, trade capture, and risk analytics.
• Integrate with ETRM/CTRM platforms (e.g., Endur, in-house risk engines) and external renewables data sources (generation forecasts, certificates registries).
• Deliver low-latency components for live pricing, trade workflows, and PnL/exposure reporting across gas, power, and environmental products.
• Automate data pipelines (e.g., SSIS/Azure Data Factory) and implement robust testing (unit/integration/contract).
• Collaborate closely with trading, risk, and operations to refine requirements and ship increments in Agile sprints.
• Harden production with observability (logging/metrics/tracing), CI/CD, and secure-by-design patterns.
• Own features end-to-end-from design and documentation to deployment and support.

• Strong C#/.NET engineering skills (async/await, generics, LINQ, dependency injection, clean architecture).
• Experience building microservices and REST/gRPC APIs; solid understanding of messaging (Kafka/RabbitMQ) and event-driven patterns.
• SQL expertise (SQL Server/PostgreSQL); comfort with schema design, performance tuning, and data reconciliation.
• Practical knowledge of cloud (Azure/AWS), containers (Docker/Kubernetes), and CI/CD (GitHub Actions/Azure DevOps).
• A product mindset: you care about usability, operational excellence, and measurable business outcomes.

• Impact at scale: Your code will sit at the heart of our trading stack across gas, power, and renewables.
• Energy transition: Help build platforms that unlock value in renewable portfolios and environmental markets.
• Growth environment: Work with a high-calibre team that values learning, autonomy, and iterative delivery.
• Culture: One team, high trust, high standards-where engineering and trading partner to create value.

Guidant, Carbon60, Lorien & SRG - The Impellam Group Portfolio are acting as an Employment Business in relation to this vacancy.