Skills

C# SQL NoSQL MongoDB CI/CD DevOps Docker Kubernetes Azure DevOps Azure Functions Architecture Databases git SQL Server Azure Analytics .NET .NET Core CI/CD Pipelines Kafka Microservices gRPC

Job Specifications

Role: Contract C# .NET Developer

Domain: Energy trading

Day rate: PS850-900/d (outside IR35)

Location: London (hybrid - 3 days per week)

Contract: 12 months (strong extension scope)

X4 Technology are partnered with a well-backed commodity trading firm in London offering an exciting outside IR35 contract opportunity for an experienced C# .NET Developer. You'll play a key role in a major tech transformation, evolving their core trading systems to a scalable data-first model - with a focus on performance, scalability, resilience and smarter system integration.

You'll be integral to reshaping the architecture of a high-performance trading platform, building new services, optimising real-time data flows and leading the charge in adopting best practices in software engineering across the .NET ecosystem.

Responsibilities of the Contract .NET Developer (Commodities)

Designing and developing C# .NET Core applications supporting real-time trading workflows and analytics
Developing and consuming RESTful and gRPC APIs in a microservices environment
Building distributed, event-driven services using Kafka or Azure Event Hubs
Implementing scalable cloud-native solutions on Azure (Azure Functions, Service Bus)
Working with relational databases (SQL Server) and NoSQL technologies (MongoDB, CosmosDB).
Automating CI/CD pipelines via Azure DevOps, improving deployment frequency and code reliability
Collaborating closely with infrastructure and DevOps teams to ensure robust, secure and maintainable deployments (Docker, Kubernetes)

Requirements for the Contract .NET Developer (Commodities)

Proven experience delivering enterprise-grade solutions with C# .NET Core in production environments
Strong background in distributed systems and messaging technologies (Kafka, Event Hubs, or similar)
Solid understanding of modern API architecture (REST, gRPC) and domain-driven design
Proficiency in both SQL and NoSQL database technologies
Hands-on experience with Azure and containerisation (Docker, Kubernetes)
Strong advocate for engineering best practices: TDD, automated testing, CI/CD, Git workflows

This is a unique opportunity to join one of London's most exciting commodity trading houses, supporting a major transformation programme. The role is paying PS850-900/d on an outside IR35 basis.

First stage interviews are being lined up for mid September so please apply online for immediate consideration.

About the Company

X4 Technology focus on helping you succeed by connecting the right people and providing the data and insights to help execute your strategic priorities. Our consultants will help you align your people strategy to your business objectives, and guide you with simplicity through the process. Core industries: Consumer Markets, Financial Services, Healthcare, Life Sciences & Technology Get in touch to find out more: Contact@x4-technology.com United Kingdom: T: +44 2078 127 700 United States: T: (718) 360-0570 Germany: T... Know more

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