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full-timeSenior Platform Engineer (united Kingdom)
Second Front Systems · United Kingdom, London and Surrounding Areas
Second Front Systems (2F) is seeking an ambitious and capable Platform Engineer to join our UK team. We are a dynamic, fast-growing defence technology company at the intersection of cutting-edge technology and national security, committed to delivering transformative solutions that empower the UK’s defenders. This is an opportunity to play a pivotal role in establishing and scaling our platform capability in the UK market. At 2F we thrive on innovation and purpose, combining a start-up’s agility with a clear mission to support national security. You will be at the forefront of the DevSecOps engineering behind the deployment and scaling of our Game Warden platform — accelerating the secure adoption of mission-critical SaaS solutions for UK government and defence. If you value ingenuity, collaboration, and impact, we want to hear from you. Security Clearance Requirement: This position requires the holder to hold, or be eligible to obtain, Developed Vetting (DV) clearance. Candidates must be UK nationals (or hold dual nationality with the UK as one nationality) and have sufficient UK residency history to be sponsored for DV. Active DV clearance is strongly preferred. As this role involves work within classified and air-gapped environments, clearance eligibility is essential and non-negotiable. Location: Primarily remote (UK-based), with frequent travel to customer and partner sites, including Northwood and Corsham Defence Campus, and occasional travel to other UK government locations. Candidates must be based within the UK and willing to travel as operational demand requires. Note that work in air-gapped or classified environments will require on-site presence at accredited facilities. What You'll Do Support the security and operations of Game Warden across air-gapped and classified environments, working directly with government partners and security teams. Build and manage CI/CD pipelines that integrate DevSecOps best practices from development through to deployment. Integrate and maintain SIEM and security tooling, ensuring observability and compliance across all deployed systems. Build and implement scalable, secure cloud infrastructure using Kubernetes and Pulumi (Go-based), ensuring compliance with UK government and Ministry of Defence security requirements. Work cross-functionally to assess infrastructure needs, prioritise development, and deliver on product roadmap milestones in a fast-paced Agile environment. Document your work thoroughly — from infrastructure to internal procedures — to ensure secure, repeatable, and auditable deployments. Collaborate directly with UK defence and government stakeholders to provision secure cloud resources and meet deployment and accreditation criteria in classified settings. Contribute to R&D and experimentation needed to advance platform capabilities in secure and disconnected environments. Act as a senior technical resource, helping to shape 2F’s UK DevSecOps strategy and infrastructure standards. What You Bring 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, with strong documentation habits. Comfortable working independently and in distributed teams, managing competing priorities across complex projects. Proficient in using AI tools (such as Claude and Gemini) to accelerate and enhance day-to-day work, from code generation, debugging, and documentation to research and problem-solving — with sound judgement about where AI adds value and where human oversight is required. 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. A genuine interest in national security and mission-driven innovation. The base salary for this position will fall between £110,00000 - £130,000 Your ultimate compensation will be determined by professional background, technical proficiency, seniority, and regional cost factors. Furthermore, this
| Role | Senior Platform Engineer (united Kingdom) |
|---|---|
| Company | Second Front Systems |
| Location | United Kingdom, London and Surrounding Areas |
| Type | full-time |
| Compensation | Not disclosed |
| Deadline | Rolling |
Typical process for this type of role
A general guide — the exact steps for this specific listing may vary; check the original posting for details.
- 1ApplicationSubmit your resume through the apply link.
- 2ScreeningRecruiter reviews your background against the role.
- 3AssessmentA technical test, assignment, or coding round, depending on the role.
- 4Interview(s)One or more rounds with the hiring team.
- 5OfferOffer letter with compensation and start date.
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