Senior Software Engineer (.NET and Azure)

Internal Information

Location: UK Wide

Grade: B2-C2

SC Clearance Eligibility required

About the job you're considering

You will build and run enterprise-scale custom software on Azure for clients in regulated and high-governance sectors. Hands-on .NET engineering, distributed systems, Kubernetes and the reliability work that keeps them healthy in production, in teams that own what they ship.

We work across Retail, Utilities, Manufacturing, Transport, Health and the Public Sector, so you will pick up new domains quickly and often.

Examples of what you will actually bebuilding

• Application modernisation/re-platforming a utilities client's billing integration layer from a monolith onto event-driven .NET microservices on AKS, with no customer-facing downtime during cutover.
• Designing and running the API platform behind a public sector service handling several million transactions a month, including the service-level objectives, observability and incident process that go with it.
• Building the internal developer platform and deployment pipelines a retail client's own engineering teams use day to day, so they can release safely without a hand-off to us.

Your Role

Delivery and technical leadership

• Act as an engineer and subject matter expert on client delivery engagements, owning specification, development, testing and implementation of complex cloud native applications on Azure.
• Lead and mentor development teams and raise the engineering standard around you.
• Shape delivery practice across projects: branching strategy, testing approach, CI/CD and release pipelines.
• Engage credibly with both technical and business stakeholders on the client side.

Engineering

• Design and document Azure cloud native solutions, incorporating recommended security practices, and contribute to architectural decisions.
• Build resilient, scalable APIs (REST, GraphQL, gRPC) and contribute to integration-led transformations and platforms.
• Containerise workloads with Docker and orchestrate with Azure Kubernetes Service.
• Define and automate infrastructure as code using Bicep or Terraform, and build out CI/CD with Azure DevOps or GitHub Actions.
• Support services before they go live through design consulting, platform and framework development, automated testing, release pipelines, capacity planning and launch reviews.
• Keep services healthy once live: availability, latency, errors, saturation and traffic, instrumented with Azure Monitor, Application Insights, OpenTelemetry and Log Analytics.
• Apply secure cloud native design principles: identity-first, encryption, least privilege and zero trust.
• Scale systems sustainably through automation, and reduce toil rather than absorbing it.

Your Skills and Experience

These six things are the bar. If you can evidence them, we want to talk to you.

• Strong production .NET engineering (C#, .NET 8 or later), with a working command of SOLID, software design patterns and test-driven development.
• End-to-end delivery of Azure PaaS solutions that went live and that you then supported.
• Modernisation of legacy applications to cloud native Azure using AI assisted tooling, e.g. GitHub Copilot
• Containerisation and orchestration in production with Docker and Kubernetes, ideally AKS.
• CI/CD and infrastructure as code in anger: Azure DevOps or GitHub Actions, and Bicep or Terraform.
• Experience delivering in collaborative agile teams in a commercial, client-facing environment.

What we will help you build

We use all of the following. You are not expected to arrive with them, and where you do not have them we will help you develop them.

• Domain Driven Design, microservice architecture, CQRS and event sourcing.
• Site reliability practice: service-level objectives, error budgets, distributed tracing and incident response.
• Identity and access with Microsoft Entra ID and Microsoft Entra External ID (the successor to Azure AD B2C).
• Security standards including OWASP and PCI DSS.
• Azure AI Services where a product genuinely needs them. Deep agentic AI work sits with our AI Engineering team, and there are routes across if that is where you want to go.
• Data platform and SQL performance work at scale.

We are a Disability Confident Employer

Capgemini is proud to be a Disability Confident Employer (Level 2) under the UK Government’s Disability Confident scheme.

As part of our commitment to inclusive recruitment, we will offer an interview to all candidates who:

-Declare they have a disability, and

-Meet the minimum essential criteria for the role.

Please opt in during the application process.

Your security clearance and pre-employment checks

To be successfully appointed to this role, it is a requirement to obtain Security Check (SC) clearance.

To obtain SC clearance, the successful applicant must have resided continuously within the United Kingdom for the last 5 years, along with other criteria and requirements.

Throughout the recruitment process, you will be asked questions about your security clearance eligibility such as, but not limited to, country of residence and nationality.

Some posts are restricted to sole UK Nationals for security reasons; therefore, you may be asked about your citizenship in the application process.

Make it real - what does it mean for you?

We realise a Total Reward package should be more than just compensation. At Capgemini we offer range of core and flexible benefits and have a Peer Recognition Portal called Applaud.

You’d be joining an accredited Great Place to work for Wellbeing in 2024. Employee wellbeing is vitally important to us as an organisation. We see a healthy and happy workforce a critical component for us to achieve our organisational ambitions.

To help support wellbeing we have trained ‘Mental Health Champions’ across each of our business areas, and we have invested in wellbeing apps such as Thrive and Peppy.

You will reimagine what’s possible: creating value for the world’s leading organisations through technology to build a sustainable, more inclusive future. You will work with a range of clients all with a unique set of business, technological and societal ambitions, which will make a real impact across the UK.

Why you should consider Capgemini

Growing clients’ businesses while building a more sustainable, more inclusive future is a tough ask. When you join Capgemini, you’ll join a thriving company and become part of a collective of free-thinkers, entrepreneurs and industry experts. We find new ways technology can help us reimagine what’s possible. It’s why, together, we seek out opportunities that will transform the world’s leading businesses, and it’s how you’ll gain the experiences and connections you need to shape your future. By learning from each other every day, sharing knowledge, and always pushing yourself to do better, you’ll build the skills you want. You’ll use your skills to help our clients leverage technology to innovate and grow their business. So, it might not always be easy, but making the world a better place rarely is.