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Senior Ruby Developer - Ministry of Justice - G7

Government Digital & Data -

Full-time (Permanent)
National: £58,511 - £65,329, London: £63,343 - £70,725
Published on
27 July 2026
Deadline
4 August 2026

Location

East Midlands (England), East of England, London (region), North East England, North West England, Scotland, South East England, South West England, Wales, West Midlands (England), Yorkshire and the Humber

The Role

Please note this role requires you to pass Security Check clearance. Please click on the link for details.

We’re recruiting for a Senior Developers here at Justice Digital, Data and Science, to be part of our warm and collaborative Central Digital team.

This role aligns against Software Developer from the Government Digital and Data Framework

At Justice Digital, we're dedicated to leveraging technology to drive impactful change across the justice system. As a Senior Software Developer, you'll play a pivotal role in enhancing access to justice and improving outcomes for offenders through innovative digital solutions.

You can find more details of the Benefits we offer here.  To help picture your life at MoJ Justice Digital, Data and Science please take a look at our blog.

Key Responsibilities:

As a Senior Software Developer at the MoJ you will have technical and people responsibilities.

Technical:

  • Securely designing, building and maintaining APIs, services and systems
  • Working on pre-existing codebases
  • Improving the resilience and stability of software
  • Applying practices to enable continuous delivery

People:

  • Developing and influencing people via line management duties, informal and formal coaching, and mentoring
  • Supporting lead developers in building high performing teams
  • Helping to build and maintain a diverse, inclusive culture across the development community, growing awareness, inclusivity, and balance

Collaboration:

  • You’ll collaborate closely with user researchers, product managers, designers, delivery managers, technical architects, and content specialists who share our vision of leveraging technology to transform government services.

Technologies:

We use a range of technologies and we’re looking for people who have experience of building web applications or back-end systems in an object-oriented language, and love learning new languages and frameworks.

Application Code: Ruby

CI/CD: Circle CI, GitHub Actions

Monitoring: Sentry

Containerization: Kubernetes, Docker

Cloud Infrastructure: AWS

Web Interfaces: GOV.UK and MoJ Design Systems

Front-End Development:

We value a deep understanding of web technologies, emphasizing semantic HTML, performant CSS, and JavaScript or TypeScript. Accessibility is a core consideration across all our services.

We’re happy to help you learn our tech stack once you’re part of our team, and do not require an exact match in your experience of languages. Check out GitHub for a closer look at the technologies we use, and a complete list of services that we build and maintain. We subscribe to the manifesto for agile software development.

Our community:

We currently have over 300 experienced developers who make up the engineering community across the MoJ. You will coach and mentor junior colleagues and take part in informal support networks with your peers. You will be encouraged to play an active role in the engineering community and culture.

We take the responsibility of supportive and effective line management very seriously. We will value the skills you bring to the civil service and help you to build on them. When the time is right, we will support moving between teams or government departments to learn different technologies, or take on more responsibility, according to your career goals.

If this feels like an exciting challenge, something you are enthusiastic about, and want to join our team please read on and apply!

Person Specification

Essential

  • Proven experience of delivering large and complex software solutions
  • Demonstrate proven experience of working in a modern object-oriented language and be confident learning new languages
  • Apply modern development and deployment techniques to your work, including continuous integration and continuous delivery
  • Champion software maintenance, clean code, coding standards and practices that make change and consistency easier
  • Write automated tests to continuously validate your work
  • Thrive when you work as part of a team that abides by the spirit of the manifesto of agile software development
  • Enjoy sharing knowledge and working in a multi-disciplinary team
  • Solve problems in a systematic way

Willingness to be assessed against the requirements for SC clearance.

We welcome the unique contribution diverse applicants bring and do not discriminate based on culture, ethnicity, race, nationality or national origin, age, sex, gender identity or expression, religion or belief, disability status, sexual orientation, educational or social background or any other factor. 

Our values are Purpose, Humanity Openness and Together. Find out more here about how we celebrate diversity and an inclusive culture in our workplace.

The Civil Service is committed to attract, retain and invest in talent wherever it is found. To learn more please see the Civil Service People Plan and the Civil Service D&I Strategy.

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