Software Developer - HMRC - HEO

As a .NET Developer, you will play a key role within the CDIO Chief Digital Product Office (CDPO) development team, contributing to the design, development, and maintenance of high-quality software products. This position involves working across disciplines to deliver secure, reliable, and user-centred digital services that meet HMRC standards and stakeholder objectives., * Development of VOA applications in the modern Azure estate.

• Development and support of VOA's suite of legacy applications built using Visual Basic 6 or Microsoft .NET, including:

• Reval Defence Tool
• Communication Masts.

• Designing, developing, and maintaining .NET applications and services, ensuring performance, scalability, and compliance with best practices.
• Collaborating with product managers, business analysts, and software developers to deliver solutions aligned with user needs and organisational goals.
• Implementing and optimising CI/CD pipelines and automation to improve deployment efficiency and operational resilience.
• Supporting DevOps practices, including monitoring, troubleshooting, and continuous improvement of cloud-hosted applications.
• Contributing to technical design discussions and ensure adherence to coding standards and security guidelines.
• Designing and implementing Valuation based rules services using industry standard engines (InRule, )., * Experience with APIM policy design, Azure App Service configuration, and observability (App Insights, alerts).
• Hands-on experience delivering solution using IaC tools (Bicep and ARM templates)

Behaviours

We'll assess you against these behaviours during the selection process:

• Managing a Quality Service
• Delivering at Pace

• Experience of developing and maintaining high-performance applications using .NET, C#.
• Development and support of legacy applications built using Visual Basic 6, VBA, and Microsoft .NET.
• Demonstrable foundation in software engineering principles and best practices such as RESTful API design, microservices, object-oriented design, and code optimisation.
• Hands-on experience with cloud technologies, preferably Microsoft Azure.
• Strong proficiency in SQL and experience with either relational or NoSQL databases.
• Experience with CI/CD pipelines, preferably using Azure DevOps.
• Demonstrable strong problem-solving, debugging, teamwork, and communication abilities.
• Proven experience in designing, configuring, and managing APIs using Azure API Management (APIM), including implementing and customising APIM policies for security, transformation, and traffic control.

Desirable criteria

• Development of VOA applications in the modern Azure estate, centred around the Data Services Layer, Microsoft Dynamics and the Valuation rules engine.
• Development and support of VOA's suite of legacy applications built using Visual Basic 6 or Microsoft .NET, including, An individual with strong experience in Software-as-a-Service (SaaS) and Platform-as-a-Service (PaaS) cloud solutions, as well as a solid background in supporting legacy applications, is essential.

Discover a career in your hands at HMRC. Whether you're seeking purpose, growth, or a workplace that gives you a true sense of belonging, hear from some of our employees as they share their story about what it's really like to work at HMRC. Visit our to watch the full series and come and discover your potential. HMRC is transforming the UK's tax system through cutting-edge digital innovation and the Chief Digital and Information Officer (CDIO) Group is at the heart of that mission. We are building high-quality digital services that will enhance the customer experience, enable real-time interactions, and make tax simpler and more intuitive for everyone. By equipping our colleagues with modern tools and technologies, we are also reshaping how we work - allowing HMRC to focus its resources where they can deliver the greatest impact. The Valuation Office Agency (VOA) are currently undergoing a transformation programme to replace legacy applications with Software-as-a-Service (SaaS) and Platform-as-a-Service (PaaS) cloud solutions., London, England, United Kingdom > 1000 employees Corporate / Direct Employer Government Digital and Data is a community of experts leading digital transformation in government, creating more efficient services that have a meaningful impact on people's lives. Government Digital and Data professionals benefit from cross-government events and learning. From webinars from the world's leading innovators to digital upskilling sessions.They enhance our professionals' skills and capabilities, which ultimately enables them to be a part of the world-leading advancements in digital transformation and government innovation.