Job Specifications
Principal Software Engineer | C# .NET Energy Trading | ETRM Architectural Redevelopment | Azure | £120,000 | 3 days in office | London
Our Client, a leading global energy brokerage, is looking for a Principal C# .NET Software Engineer to join their Power and Gas team for a crucial restructuring of their Front Office ETRM trading platform. This isn't a maintenance role you will be involved in a major architectural redesign of a C# .NET-based ETRM trading system to support the continued growth of a high-performing trading desk. You will sit as the key technical individual in this redesign, taking architectural responsibility for a low-latency C# .NET trading platform operating across Power and Gas markets.
In this role, you will own the full stack restructuring of a low-latency ETRM platform, leveraging deep C# .NET architecture experience to deliver a real-time, event-driven trading system. You will be responsible for designing a scalable C# .NET trading architecture capable of supporting increased user concurrency, complex pricing logic, P&L workflows, and execution management as the desk expands across Power, Gas, and Emissions trading.
What exists today is a legacy C# ETRM platform built for a limited user base; the challenge is to evolve it into a resilient, event-driven C# .NET trading system capable of supporting multiple Front Office traders interacting with live market data, reacting to execution events, and recalculating P&L and risk in real time. This requires deep expertise in asynchronous C# workflows, event-driven architecture patterns (Kafka / Solace), and clean separation between trading logic, execution services, APIs, and presentation layers.
You will bring first-hand experience designing high-performance C# .NET trading systems where correctness, determinism, latency control, and throughput are critical. Applying best practices from Front Office Energy Trading environments, you will ensure the ETRM platform can absorb volatility, scale horizontally, and maintain performance under stress. This is an opportunity to influence not just the C# .NET architecture, but the broader Energy Trading technology strategy across the desk balancing low latency, scalability, resilience, and maintainability.
Salary: £120,000 + performance Bonus
Location: London (Hybrid)
Tech Stack: C# | .NET 8 | Azure | On-Prem | Angular | Kafka | SQL Server | gRPC | REST APIs |
Event-Driven Architecture
Technical Requirements:
Front Office Pedigree: 8+ years of experience in a high-performance C# .NET environment, specifically building P&L, Risk, Pricing, or ETRM trading systems within Energy Trading.
Messaging Expertise: Deep experience with high-throughput messaging systems such as Kafka or Solace, implementing asynchronous, event-driven C# architecture patterns.
Architectural Leadership: Proven ability to design and construct scalable C# .NET trading platforms while maintaining clean architecture, SOLID principles, and long-term maintainability.
Database Fundamentals: Strong SQL Server experience managing high-volume trading data, audit trails, trade capture, and real-time reporting within an ETRM or Energy Trading platform.
Communication: Ability to work closely with Front Office stakeholders, traders, quants, and technology teams to define and architect scalable C# .NET ETRM solutions aligned to business growth.
Principal Software Engineer | C# .NET Energy Trading | ETRM Architectural Redevelopment | Azure | £120,000 | 3 days in office | London
About the Company
From start-ups to unicorns, you need great people to grow, so at VirtueTech we do recruitment differently.
We believe companies are defined by their people, so connecting clients and candidates through mu-tual values is key for a thriving business. With a joint brand mission being paramount for success, you need an agency aligned with that purpose. Which is precisely where we come in...
At VirtueTech jobs are more than just a salary, they're a passion. So we understand and reflect our clients values, in both ourselves and...
Know more