Descripción de la vacante

You will work on the development, maintenance, support and incremental modernisation of the UK Interactive systems (known as UKI). The role is hands-on and delivery-focused, supporting agreed enhancements, defect fixes, production support, security remediation, performance improvements and ongoing de-risking activity across existing UKI web-based applications.

The UKI systems are live, customer-facing platforms used by business users, suppliers and external customers. The role therefore requires a developer who is comfortable working with existing legacy applications, particularly WebForms and SQL Server-based systems, while also supporting gradual modernisation using newer, supported technologies where appropriate.

The role will work closely with technical leads, existing developers, support team and business stakeholders to ensure the systems remain stable, secure, maintainable and fit for purpose for current customers.

Responsibilities

Develop and maintain UKI web applications ( / WebForms)Deliver enhancements, bug fixes, and performance improvementsSupport live production systems and troubleshoot issues end-to-endWork with SQL Server (queries, views, stored procedures,



data analysis)Contribute to modernization of legacy components (.NET / Azure)Improve application performance, security, and reliabilitySupport integrations, background jobs, and data processes (imports/exports)Assist with security fixes and remediation on existing systemsCollaborate with developers, tech leads, and support teams Qualifications

Strong experience with .NET technologies, particularly / WebFormsSolid experience with SQL Server (queries, views, stored procedures, data analysis)Frontend basics: JavaScript, HTML, CSS (jQuery is a plus)Experience working on legacy systems and existing codebasesComfortable supporting live, customer-facing applications Nice to Have

C# / modern .NETAzure (App Services, SQL, DevOps)Web APIsExperience with system modernization or refactoringExposure to integrations, data imports/exports, or background jobs Skills

Strong problem-solving skills and attention to detailAbility to troubleshoot across code, data, and integrationsComfortable working in a hands-on, support-focused environmentAble to deliver safe changes to live systemsCollaborative team player with clear communication

📌 NET Developer (VB.NET, WebForms, SQL Server, Azure) (Madrid)
🏢 SGS
📍 Madrid