Senior Infrastructure Engineer (Platform/DevOps) - Companies House - SEO

Location

Remote working (anywhere in the UK)

About the job

Job summary

This is an exciting opportunity in our Digital, Data and Technology (DDaT) team. 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.   

To find out more about this opportunity and the team you will be joining, click on the link below to join our virtual, drop-in Q&A session on: 

Tuesday 10th March 2026 at 12.00pm - 12.45pm

There is no need to register, just turn up as you are.

Please send any questions you may have for the team by 8pm on Monday 9th March 2026 to recruitmentch@companieshouse.gov.uk.

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

Companies House offers a flexible and welcoming culture that promotes a healthy work life balance as well as a proactive approach to wellbeing that allows us to be our best at work.  We recognise that people are the key to our success so offer a fantastic benefits package including flexible working with no core hours, 30 days annual leave, 8 bank holidays and 1 privilege day as well as enrolment into the Civil Service Pension scheme with a contribution rate averaging 28%.   

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 Senior 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. 
• Lead and support 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. 

Person specification

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

Expert knowledge in:

• Terraform
• CI/CD tooling (e.g., Concourse)
• Cloud Technology Principles (preferably AWS)
• Git (source control and versioning)

Strong practical experience in:

• Containerisation (Docker)
• Unix/Linux

Working knowledge of:

• Ansible
• Packer