Software Engineer (C#, .Net)

Software Engineer (C#, .Net)

Position Description

At CGI, we help transform the way citizens interact with essential public services through innovative, user-centred digital solutions. As a Software Engineer, you will play a key role in developing and enhancing digital platforms that improve accessibility, user experience, and service delivery for millions of users. Working within multidisciplinary agile teams, you will contribute to the design, development, and continuous improvement of modern cloud-based applications and services. This is an opportunity to take ownership of meaningful work, apply modern engineering practices, and collaborate with talented professionals who are passionate about delivering high-quality outcomes that make a real difference across the public sector.

CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK ‘Best Employer’ by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you’ll be part of an open, friendly community of experts. We’ll train and support you in taking your career wherever you want it to go.

Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This is a hybrid position with occasional travel to Coventry or Manchester.

Your future duties and responsibilities

In this role, you will work alongside CGI and client delivery teams to design, build, enhance, and support digital services that improve how citizens access critical education services. Working within Government Digital Service (GDS) standards and agile delivery frameworks, you will contribute to the full software development lifecycle, helping to create secure, scalable, and user-focused applications that deliver measurable benefits to end users.

You will take ownership of software development activities across web applications, APIs, cloud services, and supporting platforms. Leveraging modern engineering practices, you will collaborate with architects, developers, testers, and product teams to deliver high-quality solutions while continuously improving delivery processes, performance, and user experience.

Key responsibilities:

• Design & Develop secure, scalable applications using C# .NET and ASP.NET technologies
• Build & Maintain modern web applications using HTML, JavaScript, CSS, and responsive design principles
• Develop & Support RESTful APIs and backend services for digital platforms
• Implement & Enhance event-driven architectures using Azure Service Bus, Queue Storage, and messaging technologies
• Manage & Optimise data storage solutions including SQL Server, Cosmos DB, Redis Cache, and Blob Storage
• Collaborate & Deliver within agile, multidisciplinary teams following GDS standards and best practices
• Apply & Champion modern engineering practices including TDD, CI/CD, and automated testing
• Support & Improve identity and access management solutions using Azure AD, OAuth, Gov One Login, and DfE Sign-in
• Contribute & Innovate on mobile-first digital experiences and CMS-driven solutions such as Contentful
• Maintain & Strengthen application security through remediation activities, IT Health Checks, and penetration testing recommendations

Required qualifications to be successful in this role

To succeed in this role, you will bring strong software engineering experience across Microsoft technologies, cloud-native development, and modern software delivery practices. You will be comfortable working within agile environments, collaborating with stakeholders, and delivering secure, user-focused digital services. Experience working within government or highly regulated environments would be advantageous.

Essential qualifications:

• Strong experience developing applications using C# .NET and ASP.NET
• Experience building modern front-end web applications using HTML, JavaScript, and CSS
• Proven experience designing, developing, and maintaining RESTful APIs
• Knowledge of Azure cloud services and associated platform technologies
• Experience with SQL Server and other modern data storage technologies
• Understanding of event-driven architectures and messaging technologies
• Experience with Azure DevOps, CI/CD pipelines, and automated deployment practices
• Strong understanding of Test Driven Development (TDD) and software engineering best practices
• Knowledge of Git-based version control systems such as GitHub
• Understanding of authentication and authorisation technologies including Azure AD and OAuth
• Strong communication, collaboration, and problem-solving skills

Desirable qualifications:

• Experience working within GDS standards and Government Digital Service delivery frameworks
• Experience with Cosmos DB, Redis Cache, and Azure Blob Storage
• Knowledge of NServiceBus or similar messaging frameworks
• Experience with Contentful or similar CMS platforms
• Exposure to Gov One Login and DfE Sign-in solutions
• Experience supporting IT Health Checks and security remediation activities
• Knowledge of cloud-native architecture and microservices patterns
• Experience working on large-scale public sector digital transformation programmes

#LI-JW1

Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…

You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

Come join our team—one of the largest IT and business consulting services firms in the world.