.NET Developer

Requirements:

• Commercial experience developing software using C# and .NET
• Experience building or supporting APIs, web services and system integrations
• Experience with ASP.NET / ASP.NET Core
• Experience with SQL Server, including database design and querying
• Experience using Git for source control
• Experience with Azure DevOps or similar tooling for work tracking, builds and deployment
• Experience working in a software development team in a structured commercial environment
• Experience troubleshooting and supporting live applications
• Strong problem-solving skills and a practical approach to resolving technical issues
• Good communication skills and the ability to work with technical and non-technical colleagues

Responsibilities:

• Develop, enhance, test and support .NET-based applications, APIs and integrations
• Work on customer-facing, operational and internal systems to improve their reliability, usability and business value
• Collaborate with business stakeholders, product owners, analysts and third parties to understand requirements and develop workable technical solutions
• Build and maintain integrations between internal platforms and external suppliers or services
• Maintain and improve existing applications, including troubleshooting defects, performance issues and production incidents
• Contribute to technical design decisions and ensure solutions are secure, supportable and aligned with good engineering practice
• Write clean, maintainable code and follow agreed standards for version control, testing, deployment and documentation
• Participate in code reviews, peer support and team knowledge sharing
• Assist with releases, deployments and post-release support as required
• Improve development practices, documentation and technical resilience to reduce dependency on individual team members
• Use Azure DevOps, Git and CI/CD tooling to support structured software delivery
• Contribute to a collaborative, delivery-focused team culture and continuous improvement in software development and support
• Perform other ad hoc duties assigned by the Head of IT
• Take responsibility for personal development within the scope of the role and encourage the development of others

Technologies:

• ASP.NET
• Azure
• C#
• CI/CD
• DevOps
• Git
• Support
• SQL
• Web
• Cloud

More

We are a fast-growing, highly successful organisation seeking a hands-on .NET Developer to help develop, enhance and support our customer-facing, operational and internal systems. You will work across a mixed legacy and modern application estate, collaborating with colleagues across IT, the wider business and third-party suppliers. We offer excellent training and career development opportunities, a basic salary of £55,000–£60,000 and excellent benefits. The role is based from our Southampton office two days per week, with remote working three days per week.

last updated 44 week of 2026