Head of Infrastructure Job at Xelix (London)

Head of Infrastructure

Xelix

Location:
United Kingdom , London

Category:
IT - Administration

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

To prepare for a significant period of growth, Xelix is seeking a Head of Infrastructure to own the reliability, scalability, security, and cost-effectiveness of the Xelix SaaS platform. This role provides senior technical and operational leadership to ensure our technology and processes are capable of meeting our future business needs. This is a hands-on leadership role combining architecture, operational ownership, and team development. The role requires initiating and delivering change. Our successful candidate will be able to identify the areas where we could improve, make a proposal and see the change through. Taking responsibility, showing pride in your work and excellent communication skills are essential. The current technology stack makes extensive use of Amazon Web Services using Terraform to configure services. We also use Jenkins, Sentry, GitHub, Shortcut, Python and React and an evolving suite of AI tools. The Head of Infrastructure reports to the VP of Engineering.

Job Responsibility:

Platform Strategy & Architecture: Own the long-term platform and infrastructure strategy
Design and evolve cloud architecture to support scale, resilience, and performance
Set standards for infrastructure, CI/CD, environments, and observability
Make architectural decisions and trade-offs
Developer Experience (DevEx): Provide infrastructure for the development team to code, test and deploy efficiently
Advise during design sessions to help engineers pick the right solutions for projects
Reliability & Operations: Own production reliability, uptime, and incident response
Define and enforce SLAs and SREs
Lead incident response and post-incident reviews
Ensure monitoring, alerting, and on-call practices are effective and sustainable
Security & Risk: Partner closely with the Information Security Officer on cloud security and compliance
Own platform-level security decisions and risk mitigation
Ensure secure-by-design infrastructure and access controls
Support compliance initiatives (SOC 2, ISO:27001)
Leadership & Team Development: Lead and mentor the DevOps team including DevOps engineers, IT Support and an Information Security Officer
Provide technical coaching and decision support to the DevOps team
Cost & Efficiency: Manage relationship with AWS and other vendors
Own cloud cost visibility and optimisation
Balance performance, reliability, and cost trade-offs
Introduce tooling and practices that improve developer efficiency

Requirements:

8+ years in infrastructure, platform, or SRE roles
AWS Certified Solutions Architect – Professional
Prior experience scaling production systems in a growing company
Ability to operate production systems under pressure
Deep hands-on experience with the AWS cloud platform
Strong background in reliability, observability, and incident management
Experience leading or mentoring engineers

What we offer:

27 days of annual leave (including 3 days Christmas closing) which increases up to 3 days based on tenure, with the option to roll over, buy or sell up to 3 days
Hybrid working with one day a week from our dog-friendly Hoxton office
On-site gym and cycle to work scheme
Employee discount at over 100 retailers
Comprehensive private medical & dental cover with Vitality
Enhanced parental leave pay
Learning & development culture – £1,000 personal annual budget
We’re carbon-neutral and are working towards ambitious carbon reduction goals
Lots of team socials & activities
Annual team retreat

Additional Information:

Job Posted:
March 19, 2026

Employment Type:

Fulltime

Work Type:

Hybrid work

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