Principal SRE (AWS, Azure, Terraforms, Kubernetes)

Fourth; Greater London; Hybrid; GBP 110,000 - 150,000; Full time

Benefits offered by this job

Hybrid working environment

Company laptop

Wellness discounts

Annual meet-ups

Pension and life insurance

On-demand pay

Job summary

Fourth is seeking an experienced Principal Site Reliability Engineer to accelerate cloud adoption and build automated, highly reliable infrastructure pipelines across Azure and AWS. You will collaborate withArchitecture, Product Owners and development teams to migrate products to cloud and establish standards for scalable, resilient systems.

You will design and implement scalable infrastructure, improve monitoring and automation, and drive incident management with a focus on rapid recovery and

Qualifications

• Demonstrable SRE/Platform/DevOps background with mentoring.
• Experience designing and managing large-scale, highly available infrastructure.
• Proficient with Terraform and configuration management tools (Chef preferred).
• Cloud experience across Azure and AWS.

Responsibilities

• Collaborate with Architecture, Product Owners and development teams to plan cloud migrations.
• Design scalable, highly available infrastructure to defined standards.
• Innovate tooling for monitoring, incident management, and automation.
• Document infrastructure and processes to meet industry standards.
• Lead incident management, drive rapid recovery and root cause analysis.
• Future-proof infrastructure for growth and demand.
• Leverage AI tools as appropriate and promote best practices.
• Mentor colleagues and promote professional development.

Skills

SRE experience

Mentoring others

Cloud architecture

Terraform

Configuration management

Kubernetes

Docker

Azure & AWS

Programming / scripting

Analytical problem solving

Strong communication

Agile / Kanban

Team player

Bachelor's degree

Education

Bachelor’s degree in computer science, engineering, or related field

Tools

Terraform

Chef/Ansible/Puppet

Kubernetes

Docker

Azure

AWS

Job description

Position Overview

Fourth is actively seeking an experienced and pragmatic Principal SRE to join our worldwide team. We are progressing rapidly in developing automated, highly reliable, and zero‑downtime infrastructure pipelines that are becoming the standard across our entire business – but now we want to accelerate this adoption and our move to public cloud (Azure).

Primary Responsibilities

• Working with Architecture, Product Owners and development teams to elicit and define the practical needs and requirements for products being migrated to cloud.
• Design and implement scalable, highly available, and resilient infrastructure solutions to agreed standards.
• Innovate and enhance tooling for monitoring, alerting, incident management, and automation.
• Develop and maintain comprehensive documentation for infrastructure and processes, ensuring compliance with industry standards.
• Actively participate in incident management, driving rapid recovery, root cause analysis, and continuous improvement.
• Identify and implement strategies to future‑proof infrastructure for growth and increased demand.
• Use AI tools as a force multiplier and encourage others to do the same as appropriate.
• Assist in the career development of colleagues, acting as a role model and encouraging best practice.

Preferred Experience and/or Qualifications

• Demonstrable experience in Site Reliability Engineering, Platform Engineering, DevOps, or a similar role, with experience mentoring others.
• Proven track record of designing, implementing, and managing large‑scale, highly available, and scalable infrastructure.
• Relevant and recent experience with Terraform, Configuration Management (Chef ideally, but will consider Ansible or Puppet), Kubernetes (cloud‑based), Docker (Kubernetes or AWS ECS Fargate).
• Extensive cloud experience (ideally Azure and AWS).
• Programming, scripting skills and OOP principles.
• Strong analytical and problem‑solving skills.
• Outstanding communication skills, with the ability to convey complex technical concepts to non‑technical stakeholders.
• Ability to work in a fast‑paced, dynamic environment, managing multiple priorities.
• Experience working in Agile or Kanban.
• A natural and positive team player.
• Bachelor’s degree in computer science, engineering, or a related field.

Benefits

• 25 basic holidays with the option to grow up to 30 with service + birthday off + bank holidays.
• Flexible working hours and hybrid working environments.
• Wellness activities and discounts on gym subscriptions.
• Company provided laptop and equipment.
• Healthcare expense claim tools.
• Support for certifications and professional development.
• Annual meet‑ups.
• Enhanced parenting scheme.
• Cycle to work scheme and season ticket loan provided.
• Pension and life insurance options.
• On‑demand pay tools to allow salary access before the end of the month.

Fourth is an Equal Opportunity Employer

All qualified applicants will receive consideration without discrimination because of sex, gender identity, gender expression, sexual orientation, marital status, race, colour, age, national origin, military status, religion, or disability or any other legally protected status.

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