Senior Back End Engineer (.NET/Azure)

Location: Central London, UK

Duration: 6 Months Contract

Rate: 360 GBP/Day inside IR35

Client is seeking a Senior Back End Engineer to help deliver our Private Client Lending Origination Platform (IMPACT), a modern, workflow-driven platform supporting the full private client mortgage journey.

We’re looking for an experienced engineer who combines deep .NET and Azure expertise with a collaborative, pragmatic mindset. You’ll design and implement the backend services, APIs, and integrations that power our lending ecosystem, while working closely with front-end, product, and infrastructure teams.

This is a role for someone who enjoys solving complex technical problems within a supportive engineering culture — bringing experience others can learn from, while being open to Client’s ways of working and shared engineering principles. You’ll be part of a team where architectural thinking, reliability, and craftsmanship are valued just as much as delivery speed.

Core skills include:

• 5–8 years’ experience building backend systems using .NET Core / .NET 6/8+ and C#.
• Strong experience with Azure, including Container Apps, Functions, Service Bus, Networking and API Management.
• Proven ability to build secure, scalable, and maintainable APIs and integrations.
• Familiarity with CI/CD pipelines and DevOps workflows in Azure DevOps or similar.
• Experience implementing authentication, authorization, and secure data exchange patterns.
• Competence with SQL Server — schema design, query tuning, and data optimization.

Other beneficial attributes include:

• Exposure to Infrastructure as Code (Terraform or Bicep).
• Understanding of event-driven or microservice architectures.
• Familiarity with monitoring, logging, and resilience engineering in Azure.
• Experience in financial services or other regulated domains.
• Experience collaborating with front-end and QA engineers.