Software Developer (.Net) - 9-Month Contract (Inside IR35) - Northampton

We are seeking an experienced Software Developer with strong .NET expertise to join a specialist engineering team that support the workflows of Thermofluids Engineering and IT teams. The role focuses on building scalable applications, APIs, and data systems using the Microsoft ecosystem.

Key Responsibilities:

• Design, build, and maintain .NET microservices within a distributed, event-driven architecture
• Develop and operate services deployed in Kubernetes (on-prem/cloud) environments
• Build systems that communicate via message queues (eg RabbitMQ, Kafka, Service Bus)
• Work closely with engineering stakeholders to translate workflows into scalable data processing pipelines
• Contribute to system design, reliability improvements, and performance optimisation
• Troubleshoot and resolve production issues, including latency and data consistency challenges
• Support and enhance CI/CD pipelines, containerisation, and deployment patterns
• Collaborate on improving engineering standards, code quality, and system architecture

What You Will Ideally Bring:

• Strong experience with C# and modern .NET (Core/.NET 6+)
• Proven experience building microservices and distributed systems
• Hands-on experience with Docker and Kubernetes (AKS, EKS, GKE or on-prem clusters)
• Experience with messaging systems such as RabbitMQ, Kafka, or Azure Service Bus
• Experience working with event-driven architectures
• Strong understanding of Back End system design, APIs, and data processing workflows
• Experience with cloud platforms (Azure, AWS, or GCP) and CI/CD pipelines
• Experience debugging and improving performance, scalability, and reliability in production systems

Contract Details:

• Duration: 6 months (with potential extension)
• Day Rate: up to £500 (Inside IR35)
• Location: Northampton - (3 days per week mandatory)
• Start Date: ASAP