Backend Engineer (.NET / Azure).

Backend Engineer (.NET / Azure) London, Old Street | Hybrid (3 days on-site)

Please note you need to be based in the UK and have the right to work in the UK as no sponsorship is offered for this role.

About the role

Connect is a flagship SaaS platform built to simplify workforce access, digital identity, and provisioning for frontline organisations. Handling automated onboarding, secure SSO, real-time HRIS integrations, and the identity infrastructure that keeps thousands of employees connected to the tools they need.

We're hiring a Backend Engineer to help build and evolve the core of Connect. This is a hands-on, delivery-focused role for someone who understands distributed Azure-native systems, thinks carefully about security and resilience, and isn't afraid to challenge how we do things when they see a better way.

You'll work closely with senior engineers and architects - owning features end-to-end, contributing to technical direction, and helping raise the bar on engineering quality as we scale.

What you'll be doing

• Building and maintaining backend services, APIs, and integrations across the Connect platform in C# / .NET
• Designing and implementing event-driven, async workflows using Azure Service Bus
• Working with Cosmos DB and Azure-native infrastructure - contributing to the migration from Service Fabric toward Azure Container Apps
• Owning features from technical design through to production - including troubleshooting and triage when issues arise
• Collaborating with senior engineers and architects to evolve the platform's architecture
• Writing clean, testable code with automated tests and robust CI/CD practices via Azure DevOps
• Bringing ideas to the table - if you think there's a smarter approach, we want to hear it

What we're looking for

Must-haves:

• Strong C# and .NET (modern versions) - this is a pure backend role
• Hands-on experience building distributed, Azure-native systems - Service Fabric, Azure Functions, Cosmos DB, Azure Service Bus
• Solid understanding of async / event-driven patterns and microservices architecture
• Microsoft Entra ID / Azure AD - authentication flows, SSO, and identity management are central to what we build
• Azure DevOps CI/CD pipeline experience
• Comfortable with production ownership in a small, high-trust team

Nice to have:

• Azure Container Apps (ACA) or experience migrating away from Service Fabric
• Azure API Management (APIM)
• Azure B2C
• Background in SaaS platforms with people data, HRIS, or identity/access management integrations

Our stack

Backend: C#, .NET, Azure Service Fabric (migrating to ACA), Azure Functions, Azure Service Bus, Cosmos DB, Key Vault Infrastructure: Azure, Azure DevOps Identity: Microsoft Entra ID, Azure B2C

The team

Small, senior-leaning engineering team. You'll have two senior/lead engineers to work alongside - but this isn't a hand-holding environment. We move quickly, we own what we build, and we expect you to bring your own ideas and judgment to the table.

Location London, Old street- Hybrid, 3 days per week on-site

We Are Aspire Ltd are a Disability Confident Committed employer