Senior Infrastructure Engineer (Database)

We have an exciting opportunity for an experienced Senior Infrastructure Engineer (Database) to join our Infrastructure Engineering team. You'll play a key role in delivering, supporting, and evolving our database platforms, with a particular focus on Oracle and MongoDB technologies.

Working across cloud-based and modern database environments, including Oracle on AWS, MongoDB Atlas, PostgreSQL, and automation tools, you'll help ensure our services remain secure, resilient, and highly available. You'll be involved in database administration, performance optimisation, security, backup and recovery, monitoring, and supporting major technology and business change initiatives.

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

Why join us? Here’s what you’ll enjoy:

• 30 days annual leave + 8 bank holidays + 1 privilege day
• Civil Service Pension with an average 28% employer contribution (worth £12,434 for this role!)
• Equality, diversity & inclusion at the heart of everything we do
• Flexible and mobile working for a great work-life balance
• Seasonal flu jabs
• Generous family leave – maternity, paternity, adoption & shared parental
• Cycle to Work scheme

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

If you have any questions about the role or process, please reach out to

This role closes on Sunday 4th October 2026 at 23.55pm.

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.
• You will be based at either our Cardiff or Edinburgh office where you will be expected to attend on a regular basis.
• On-call duties form part of this role and will be undertaken on a rota basis once you are fully trained and and have met competency expectations.