https://jobs.co.uk/job/software-developer-hays--d4dc7694-017e-465b-8dda-24740d1208fd RSS feed for Software Developer at Hays. en-gb Thu, 03 Sep 2026 18:43:46 GMT https://jobs.co.uk/job/software-developer-hays--d4dc7694-017e-465b-8dda-24740d1208fd https://jobs.co.uk/job/software-developer-hays--d4dc7694-017e-465b-8dda-24740d1208fd Thu, 03 Sep 2026 11:53:23 GMT Location: Londonderry | Salary: 10000-500000 Annual | Type: Permanent | Senior Software Developer C# / .NET / ReactJoin a leading construction organisation with a well-established in-house technology team that is driving digital innovation across the business. This is an opportunity for an experienced Senior Software Developer to play a key role in delivering modern software solutions while also supporting the evolution of existing business-critical systems.Working closely with stakeholders and fellow developers, you will take ownership of the design, development and enhancement of applications that support a large and growing organisation. This role offers the chance to work across modern web technologies, APIs and legacy systems while influencing technical direction and best practice.Please note: This is a hybrid role requiring 4 days per week in the office.What you''ll be doingDesigning, developing and maintaining applications using C# and .NETBuilding modern front-end solutions using React.jsDeveloping and integrating RESTful APIsWorking with SQL Server to support database development, troubleshooting and optimisationSupporting and enhancing existing Windows Forms (WinForms) applicationsAnalysing existing systems and identifying opportunities for m... Permanent