Senior Software Engineer

The Insolvency Service; Cardiff; Hybrid; GBP 48,000 - 58,000; Full time

Benefits offered by this job

Flexible working

25 days annual leave (30 after 5 years

Civil Service pension contributions 29

Learning and development leave

Cycle to Work

Job summary

The Insolvency Service in partnership with Inspire People is seeking a Senior .NET Developer to join its Digital Services team and help modernise and improve digital services used by colleagues, businesses and the public. This is a permanent role with a salary of £48,429 - £57,722 (payable after interview) and 29% employer pension contribution plus full Civil Service benefits.

Flexible, hybrid working from 9 UK locations.

Qualifications

• C# and .NET development experience within modern web applications.
• Experience with TDD/BDD, automated testing, CI/CD and DevOps.
• Knowledge of APIs, real-time, scheduled and messaging services.
• Experience with cloud-based IaaS and PaaS solutions and secure software development.
• Strong analytical and communication skills; able to contribute to technical discussions.

Responsibilities

• Design, develop and maintain secure, accessible enterprise applications.
• Deliver functionality against user stories and Agile objectives.
• Improve code quality through automated testing, peer reviews and debt reduction.
• Contribute to architectural discussions, engineering standards and reusable components.
• Support live services through incidents, releases and documentation.

Skills

C# & .NET

TDD/BDD

CI/CD

DevOps

APIs

Azure cloud

Communication

Tools

Azure SQL

Cosmos DB

App Services

Function Apps

AI Search

GitHub workflows

Job description

Build and modernise digital services that support thousands of people and businesses across the UK.

The Insolvency Service, in partnership with Inspire People, is looking for a Senior .NET Developer to join its Digital Services team and help modernise and improve a portfolio of digital services used by colleagues, businesses and the public. Permanent role, salary £48,429 - £57,722 (based on assessment at interview), 29% employer pension contribution plus full Civil Service benefits. Flexible, hybrid working from 9 UK locations.

If you would like to find out more about the role, the team and what it's like to work at the Insolvency Service, we are holding a Teams Hiring Manager Q&A session for this role where you can virtually meet the team on Monday, 5th October 2026 at 16:00 – 17:00

About the Senior Developer role

This role will join the Digital Services team, part of Change and Technology Services within the Insolvency Service, supporting enterprise applications used by internal teams, external organisations and the general public.

The team is consolidating its technology stack and moving away from legacy services, with a growing focus on Microsoft .NET 10 and Azure. This is a strong opportunity to help modernise digital services, influence technical approaches and contribute to a more sustainable, user-centred technology environment.

The role will also contribute to the ongoing improvement of a portfolio of live digital services, helping reduce technical debt, improve consistency across the technology estate and support faster, more effective delivery of future change.

Responsibilities of a Senior Developer

• Design, develop and maintain secure, accessible and maintainable applications across enterprise digital services.
• Deliver functionality against agreed user stories, acceptance criteria and Agile delivery objectives.
• Take ownership of code quality through automated testing, peer reviews, defect prevention and addressing technical debt.
• Contribute to architectural discussions, engineering standards, reusable components and common development approaches.
• Support live services through incident resolution, releases, deployments, documentation and ongoing continuous improvement.

Essential criteria for a Senior Developer

• C# and .NET development experience within modern web applications.
• Experience of modern engineering practices including TDD/BDD, automated testing, CI/CD and DevOps.
• Good understanding of integration approaches including APIs, real-time, scheduled, batch and messaging services.
• Experience working with cloud-based IaaS and PaaS solutions, alongside strong knowledge of secure and maintainable software development.
• Strong analytical, problem-solving and communication skills, with the ability to contribute to technical discussions, share knowledge and support colleagues.

Desirable criteria for a Senior Developer

• Experience working with Microsoft Azure services such as Azure SQL, Cosmos DB, App Services, Function Apps and AI Search.
• Knowledge of clean architecture, OOP, SOLID, RESTful APIs and GitHub-based development workflows.
• Experience of GOV.UK standards, including the Service Manual and Technology Code of Practice.

Alongside your salary of up to £57,722, Insolvency Service contributes £14,029 towards you being a member of the Civil Service Defined Benefit Pension scheme. We want you to have a good work-life balance and want to support you in all that you do, so they offer a great benefits package including:

• Flexible working arrangements and flexi-time
• 25 days annual leave, increasing to 30 days after 5 years’ service
• Competitive maternity, paternity and parental leave
• 5 days paid learning and development leave
• Cycle to Work scheme
• Access to Workplace Wellness, the employee assistance programme offering confidential and independent support and advice

Office locations

The role is open across 9 of Insolvency Service locations:

Birmingham, Cardiff, Edinburgh, Exeter, Ipswich, Leeds, Manchester, Newcastle and Nottingham

Additional Requirements

• Expectation is to spend 60% of your working time in one of the offices.
• This role operates under the flexible working hours agreement, supporting a positive work-life balance
• The post is subject to SC level clearance, a requirement for which you must have resided in the UK for a minimum of 5 years.
• The Insolvency Service does not currently hold this licence and therefore cannot legally sponsor Skilled Worker visa applicants.

This is an opportunity to join the Insolvency Service at an important point in its technology journey.

You will be working on a wider programme to maintain, improve and modernise more than 10 digital services, helping the team move away from older applications and inconsistent technologies towards a more focused and maintainable Microsoft-based environment.

You will have the opportunity to improve live services, influence engineering standards, contribute to technical decisions and work with modern development practices across a collaborative Digital Services team.