Senior Infrastructure Engineer (Platform/DevOps)

Job summary

We are looking for an enthusiastic Senior Infrastructure Engineer (DevOps/Platform) with great leadership and technical skills and a drive to improve. This role is a unique opportunity as you will be part of a team delivering Platform infrastructure and systems to the highest standards and implementing the DevOps culture and principles across the business.

Watch this video to find out more about working in Digital at Companies House

Why choose Companies House?

At Companies House we take a proactive approach to wellbeing by promoting a welcoming culture, healthy work life balance and supporting colleagues to be their best in work because we know people are the key to our success.

Our benefits include:

Flexible working with no core hours (between 6am and 8pm)

30 days annual leave + Bank Holidays

Enrolment into the Civil Service Pension scheme, with an average employer contribution of 28%

Give yourself the best opportunity to apply!

Join our Outreach team for an informal, drop-in 'find out more' session.

No need to register - just click on the following link to join, listen, and gain tips to help you apply:

Monday 5th October 2026 12:00 - 12.45

Cameras and microphones will be switched off.

Can’t make the session? Just email our Outreach mailbox on: [email removed] and we’ll share a copy of the session slides.

Find out more about what a great place Companies House is to work

Please note:

• Companies House cannot offer Visa sponsorship to candidates through this campaign
• Security Clearance is an essential requirement for this campaign. You'll need to have been in the UK for at least 3 out of the last 5 years to be eligible to apply for SC.
• The team for this role is based in our Cardiff office, and a hybrid employment contract will be provided as the standard offering. However, remote contracts may be considered as an exception whereby commuting to the office location of your team is not reasonably practicable.
• The nature of this post may occasionally require you to do overtime during the week and at weekends.

Job description

The position will be focussed on building and maintaining Infrastructure to enable the organisation to deliver rapidly and reliably deploy and innovate for our customers. A Senior Infrastructure Engineer will work with our development teams, ensuring work is delivered to the standards set out in our best practice guides. The role requires the candidate to lead on various streams of work and provide technical support to Infrastructure engineers across the organisation.

As a enior Infrastructure Engineer, the candidate must perform at the level defined within the DDAT Capability Framework

Responsibilities

• You will be responsible for delivering the infrastructure and tooling to support a continuous delivery approach within Companies House.
• You will be user and service focused ensuring that value is delivered through improvement and automation of platform services.
• Working in a team of infrastructure specialists and engineers, a Senior Infrastructure Engineer builds, administers, supports, and maintains solutions as directed and according to departmental policy.
• Most of the time will be spent working with the delivery teams on carrying out the infrastructure work on development projects. This will include answering any queries regarding environment, configuration, and CI/CD processes.

At this role level, you will:

• Ensure services are integrated, delivered, and operated as required.
• Work with technical architects to translate architectural designs into operations.
• Design and develop infrastructure as code, source code repositories, and Continuous Integration/Continuous Delivery pipelines to execute change on Cloud environments.
• Collaborate with colleagues in non-functional requirements, ensuring availability, security, capacity, and performance for the platform and/or service.
• Transform technical requirements into an effective DevOps toolchain to enable product delivery.
• Ensure that deployment strategies for products are repeatable, scalable, and universally available.
• Have deep technical knowledge, providing support to delivery teams and solving complex problems.
• Ensuring best practice guides are maintained and adhered to.

You can read more about a career in Digital and Data within the Civil Service in the Government Digital and Data Candidate Information Pack.

Person specification

We are looking for the following experience, which will be assessed at sift and at interview.

Expert knowledge in:

• Terraform
• Continuous Integration / Continuous Delivery Tooling and Principles (e.g., Concourse)
• Cloud Technology Principles (preferably AWS)
• Git (source control and versioning)

Working knowledge of:

• Ansible
• Packer
• Containerisation (Docker)
• Unix/Linux

Behaviours

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

• Working Together
• Changing and Improving
• Developing Self and Others
• Making Effective Decisions
• Delivering at Pace

Benefits

Alongside your salary of £41,509, Companies House contributes £12,025 towards you being a member of the Civil Service Defined Benefit Pension scheme. Find out what benefits a Civil Service Pension provides (opens in a new window).

We believe that our success is driven by the well-being and satisfaction of our team members at all levels of the organisation. At Companies House we’re committed to providing a comprehensive benefits package that goes beyond the ordinary, ensuring your career journey with us is not only fulfilling, but also rewarding. We pride ourselves on offering a quality work-life balance with our employee wellbeing being central to our working practices.

Head to our Recruitment Careers Hub to find out more about the fantastic benefits package we have at Companies House.

We celebrate diversity...

As an equal opportunity employer, we celebrate diversity, being committed to ensuring we’re representative of the citizens we serve and creating an inclusive environment. Everyone in Companies House brings something different, and so will you. To fulfil our commitment to recruiting and attracting diverse talent we welcome applications from underrepresented groups. We also welcome applications from Welsh speakers.

We are proud to be a disability confident leader. Our recruitment process is f