Senior Platform Engineer (United Kingdom)

The role

You will support the security and operations of the Game Warden platform across air-gapped and classified environments. You will build cloud-native infrastructure, manage CI/CD pipelines, and collaborate with UK defence stakeholders to deliver secure SaaS solutions.

What you will do

• Support the security and operations of Game Warden across air-gapped and classified environments
• Build and manage CI/CD pipelines that integrate DevSecOps best practices
• Integrate and maintain SIEM and security tooling
• Build and implement scalable, secure cloud infrastructure using Kubernetes and Pulumi
• Work cross-functionally to assess infrastructure needs and deliver on product roadmap milestones
• Document work from infrastructure to internal procedures
• Collaborate with UK defence and government stakeholders to provision secure cloud resources
• Contribute to R&D and experimentation for platform capabilities in secure and disconnected environments
• Act as a senior technical resource to shape UK DevSecOps strategy and infrastructure standards

Required qualifications

• 5–7+ years of relevant experience in DevSecOps, systems engineering, and software development
• Senior-level expertise designing and building cloud-native platforms using AWS, Azure, or GCP
• Experience with Kubernetes, Docker, and cloud-native application orchestration
• Strong proficiency in Golang or similar languages
• Familiarity with UK and international compliance frameworks such as MOD Secure by Design, JSP 453, NCSC Cloud Security Principles, NIST 800-53
• Experience deploying systems in air-gapped or classified environments
• Experience building and maintaining secure CI/CD pipelines and integrating security throughout the SDLC
• Hands-on experience implementing or managing SIEM, monitoring, and alerting systems
• Understanding of REST APIs, authentication flows, event-driven architecture, and microservice patterns
• Excellent written and verbal communication skills
• Proficient in using AI tools (such as Claude and Gemini)
• Right to work in the United Kingdom

Nice to have

• Certified AWS, Google or Azure Solutions Architect
• Prior experience working within UK defence, national security, or regulated government environments
• Experience working in early-stage or high-growth start-up environments
• Familiarity with UK accreditation and risk-management processes and environments (e.g., MOD Secure by Design)
• Familiarity with GitLab, Google Workspace, and Slack

Benefits

• Competitive salary benchmarked to UK market
• Private healthcare (medical, dental, and optical)
• Pension scheme with employer contribution
• Wellness perks (fitness, mental health resources)
• Equity incentive plan
• Technology and home-office stipend
• Annual professional development budget
• Flexible paid time off plus UK public holidays
• Enhanced parental leave
• Remote-first working with travel expenses covered
• Referral bonus scheme

Before you apply

• Must hold, or be eligible to obtain, Developed Vetting (DV) clearance
• Must be UK nationals (or hold dual nationality with the UK as one nationality)
• Must have sufficient UK residency history to be sponsored for DV
• Sponsorship for this role is not available

About the company

Second Front Systems (2F) is a defence technology company that equips defence and national security professionals with access to emerging technologies. Their Game Warden platform is a managed and compliant DevSecOps environment for accelerating SaaS application deployment for government use.