Contract C# .NET Developer (Commodities)

JR United Kingdom; London; On-site; GBP 125,000 - 150,000; Full time

Job summary

Join a dynamic and innovative commodity trading firm in London as a Contract .NET Developer. This exciting opportunity involves leading a tech transformation, enhancing core trading systems with a focus on performance and scalability. You'll design and develop cutting-edge C# .NET Core applications, work with RESTful and gRPC APIs, and implement cloud-native solutions on Azure. Collaborate with infrastructure and DevOps teams to ensure robust deployments while advocating for engineering best practices. If you're looking to make a significant impact in a high-performance environment, this role is perfect for you.

Qualifications

• Proven experience in delivering enterprise-grade solutions with C# .NET Core.
• Strong background in distributed systems and messaging technologies.

Responsibilities

• Design and develop C# .NET Core applications for real-time trading workflows.
• Implement scalable cloud-native solutions on Azure.

Skills

C# .NET Core

RESTful APIs

gRPC APIs

Azure

SQL Server

NoSQL technologies

Docker

Kubernetes

TDD

CI/CD

Tools

Azure DevOps

Kafka

Event Hubs

Job description

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Client:

X4 Technology

Location:

london, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

4

Posted:

28.04.2025

Expiry Date:

12.06.2025

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Job Description:

Domain: Commodities trading

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.
• 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 £700-750/d on an outside IR35 basis.

First stage interviews are being lined up for W/C 28th April, so please apply online for immediate consideration.