Senior Platform Engineer - Defence / National Security

SR2
London, United Kingdom
Today
£80,000 – £90,000 pa

Salary

£80,000 – £90,000 pa

Job Type
Permanent
Work Pattern
Full-time
Work Location
On-site
Seniority
Senior
Education
Degree
Security Clearance
Required
Posted
29 Apr 2026 (Today)

Benefits

£500 per month DV allowance Clear progression routes Annual promotion cycle Opportunity to work in a fast-growing strategic area

Senior Platform Engineer - Defence / National Security

Active DV clearance required

SR2 is supporting a leading digital technology consultancy as it looks to appoint a number of Senior Platform Engineers into its growing Defence and National Security practice.

This is a hands-on, end-to-end cloud engineering role supporting a secure cloud platform programme, focused on helping a major public sector organisation move from on-premise environments into AWS cloud. You will help design, build, automate, secure and support modern cloud platforms used on nationally important services.

This opportunity is particularly well suited to a senior engineer with strong, recent AWS platform experience, a good understanding of CI/CD and automation, and the ability to contribute to platform design decisions while mentoring junior engineers. You will work closely with architects, security specialists and wider engineering teams to deliver scalable, secure and reliable cloud services in a complex secure environment.

Key Responsibilities

Design, build and support secure AWS cloud platform components for Defence and National Security programmes

Work closely with architects on cloud platform deployment, design and technical decision-making

Build, maintain and improve CI/CD pipelines for reliable software and infrastructure delivery

Automate infrastructure and platform services using tools such as Terraform, Ansible or equivalent

Work with AWS services such as Lambda, S3 and wider cloud-native tooling

Monitor, secure and continuously improve cloud platforms using tools such as Prometheus and Grafana

Apply security best practice across AWS environments, including firewalls and secure cloud controls

Coach and mentor junior engineers, helping to build strong DevOps engineering standards across the teamSkills & Experience

Active DV clearance is essential; candidates must already hold DV clearance

Strong, recent hands-on AWS cloud platform experience

Experience designing, building, testing, automating, monitoring and supporting modern digital service platforms

Good experience building CI/CD pipelines

Infrastructure as Code and automation experience, ideally with Terraform and/or Ansible

Good understanding of cloud security, AWS security controls and secure platform design

Scripting or coding experience in Python, Bash, Node.js or similar

Experience working in multidisciplinary agile, DevOps or platform engineering teamsPackage & Benefits

Competitive salary

£500 per month DV allowance

Clear progression routes into Lead Platform Engineer, Tech Lead or Platform Technical Architect roles

Annual promotion cycle, with out-of-cycle promotions considered on a case-by-case basis

Opportunity to work within one of the organisation's fastest-growing strategic areas

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