Software Developer

Manchester Digital; Cardiff, Glasgow, Greater London; Hybrid; GBP 34,000 - 46,000; Full time

Job summary

A digital transformation agency is seeking a Software Developer to create impactful digital solutions for green initiatives in the UK. Covering modern technologies, you will develop and support applications that ensure the delivery of essential public services. The ideal candidate will have strong experience in Microsoft-based development, including C#, SQL Server, and Azure. This role offers a hybrid working model and opportunities for career advancement in a collaborative environment.

Benefits

Exceptional benefits package

Career development opportunities

Support for hybrid working

Qualifications

• Strong experience in Microsoft-based development.
• Knowledge of C#, Entity Framework Core, and SQL Server.
• Understanding of Azure and microservices architectures.
• Experience with containerization tools like Docker and Kubernetes.

Responsibilities

• Develop and support applications for green initiatives.
• Collaborate with cross-functional teams on projects.
• Support junior colleagues and manage technical activities.

Skills

Microsoft .NET (C#)

.NetCore

ASP.Net MVC

API development

Object-Oriented Design

Entity Framework

SQL Server Development

Unit Test Frameworks

CI/CD pipelines

Docker

Kubernetes

Tools

Azure DevOps

GIT

Job description

Full-time (Permanent) National £34,123-£45,831 / London £36,824-£48,561
Published on 19 January 2026 Deadline 2 February 2026

Location

Successful candidates may be based in any of our office locations – Cardiff, Glasgow, or London. We especially welcome applicants from Cardiff and Glasgow.

About the job

Job summary

Help shape the future of energy through impactful digital solutions. Ofgem is looking for a Software Developer to support the delivery of green energy and social schemes, using modern technologies to build services that make a real difference to people's lives.

We’re offering a permanent role where you’ll contribute to the development of applications that support some of the UK’s most vital public services. This is a high-impact opportunity to influence how digital tools are built and delivered, ensuring the systems behind our schemes are efficient, secure and user-focused.

You’ll develop and support innovative applications that contribute to green initiatives, as well as take part in the technical development of projects and implement new technologies. There’s plenty of scope for application development, process improvement and shaping the way we work within an agile delivery environment.

This development role will also give you the chance to support junior colleagues, guiding and mentoring them, and to step up and take on management activities for various projects. Collaboration will be at the heart of your approach as you work with other developers, stakeholders and digital experts to create scalable, sustainable solutions that meet Government Digital Service standards.

We’re looking for someone with strong experience in Microsoft-based development, including C#, Entity Framework Core and SQL Server, as well as a solid understanding of Azure. You’ll be familiar with applying design patterns, writing and executing unit tests, and working within microservices architectures. Experience with containerization tools such as Docker and Kubernetes, and the ability to communicate effectively across technical and non-technical audiences, will be key to success in this role.

At Ofgem, you’ll be part of a collaborative, inclusive environment where your ideas are valued and your expertise can flourish. We support hybrid working, offer an exceptional benefits package and provide the flexibility and development opportunities that will see you advance your career.

We have a critical purpose to deliver smart, efficient digital services that power the UK’s clean energy future. You will help ensure that essential schemes are built on strong technical foundations, enabling fairer, greener outcomes for consumers and communities across the country.

SC is required for this role. Information and eligibility guidance can be found here: SC - Guidance Pack for Applicants - GOV.UK

Key Responsibilities

• Development, maintenance, and support of key Ofgem scheme applications.
• Technical documentation of key Ofgem business applications.
• Technical ownership of application requirements.

Key Outputs and Deliverables

• Ensuring that business applications developed internally and externally are technically and functionally suitable for Ofgem.

Key Stakeholder Relationships

• To work as part of a team with Developers, Business Analysts, Project Managers, QA Testers, and the IT Infrastructure team to develop and deliver key Ofgem business applications.
• To work with the IT Infrastructure team to resolve issues with Ofgem business applications.
• To work with the IT Service Desk to resolve internal and external customer issues with Ofgem business applications.
• To work with outsourced development partners to transfer technical knowledge of externally developed applications in-house.

Person specification

• (Lead) Essential skills and proven expertise in the following technologies: Microsoft .NET (C#), .NetCore, ASP.Net MVC, API development, Object-Oriented Design, SOLID development techniques and design patterns.
• Knowledge and experience of: Entity Framework, Relational database design, SQL Server Development, SQL Stored procedures, Writing unit and integration tests, Unit Test Frameworks and tools (Nunit, Moq, etc).
• A good working knowledge of some of the following technologies: Version Control tools and workflows (GIT), CI/CD pipelines within Azure Devops, Build and deployment automation, Cloud Technologies (Azure), Microservices.
• Demonstrable expertise of collaborative working with: Business Analysts, Automation Engineers, Delivery Managers, Product Managers, Senior Managers, and Business Customers.
• Strong work planning, time management, and change management skills across multiple functional groups and departments, and strong skills involving prioritizing and reprioritizing development tasks.