IT Core Systems Engineer

Description

We are looking for an experienced Core Systems Engineer to help design, deliver, and support infrastructure platforms that are highly available, secure, and resilient.

Final date to receive applications: 21 September 2026

Department: IT

Location:

London

This role is focused on infrastructure modernisation and project delivery, covering hybrid infrastructure, identity services, data centre operations, resilience, and platform improvement initiatives. You will play a key role in shaping the future direction of our core systems as we continue evolving towards a more modern, secure, and cloud‑aligned technology estate.

While there is an element of BAU support and operational ownership, the role is primarily centred around delivering strategic infrastructure improvements and engineering‑led projects.

• Deliver projects to improve identity, infrastructure, and core systems architecture, following modern security and operational best practices.
• Lead infrastructure modernisation initiatives, including service migrations, platform improvements, and resilience enhancements.
• Design, implement, and validate disaster recovery and failover solutions across core systems.
• Own and maintain core infrastructure platforms across hybrid and data centre environments.
• Support the business transition towards modern infrastructure and cloud‑aligned services.
• Produce and maintain high‑quality technical documentation, standards, and operational procedures.
• Act as an escalation point for complex third‑line infrastructure issues where required.
• Contribute to platform stability, security, scalability, and operational resilience across the wider estate.

• Identity platform redesign, migration, consolidation, or security hardening initiatives.
• Designing and testing disaster recovery and failover processes within production environments.
• Delivering or contributing to security‑focused infrastructure initiatives.
• Supporting and improving enterprise infrastructure platforms across hybrid environments.
• Working with a broad range of infrastructure technologies, including identity, virtualisation, storage, networking, and backup systems.
• Enterprise networking fundamentals, including routing, segmentation, DNS, and firewall concepts.

• Project‑driven environment with a high level of ownership and accountability.
• Small engineering team with the autonomy to deliver meaningful technical improvements.
• Primarily remote working, with on‑site attendance once per week (or as required) at the London office and data centre.
• Participation in an on‑call rota and occasional out‑of‑hours work.

• 5+ years’ experience within core infrastructure, systems engineering.
• Able to identify weaknesses or inefficiencies within existing platforms and drive improvements.
• Focused on reducing complexity, improving maintainability, and lowering operational overhead.
• Comfortable taking ownership of systems, platforms, or technical deliverables with minimal supervision.
• Able to work from defined technical requirements and low‑level designs while ensuring high implementation standards.
• Strong analytical and problem‑solving skills, with a structured and methodical approach.
• Security‑conscious, designing solutions with resilience, recoverability, and operational stability in mind.
• Comfortable operating as a trusted technical contributor within a wider engineering team.
• Strong communication and documentation skills across both technical and non‑technical audiences.
• Motivated to continuously learn and develop through both self‑led study and formal training.

• Competitive salary and benefits package.
• Hybrid model: primarily remote working but on‑site attendance once per week (or as required) at the London office and data centre.
• Holiday allowance.
• 50% staff discount and 25% for family and friends.
• Pension scheme.