Platform engineer in public sector

Are you a Senior or Lead Platform Engineer who thrives on solving complex infrastructure problems and building production-grade platforms that operate reliably at scale while also influencing the design, strategy, and governance decisions that shape how teams deliver? Join our engineering team helping public sector clients build and continuously improve critical digital services using modern cloud-native and open-source tooling.

• You’ll help design, build, run and improve the platforms behind critical government services, systems that need to stay secure, observable and resilient even under national-scale load.
• You’ll help build secure multi-cloud landing zones (majority AWS), GitOps-driven platforms and internal developer platforms that give engineers true self-service.
• You’ll modernise legacy estates into cloud-native architectures, unify observability across complex environments using OpenTelemetry and modern APM platforms, and drive FinOps-focused optimisation.
• You’ll contribute to and help shape engineering standards, SRE-aligned operability, CI/CD performance, supply-chain security, platform-as-a-product thinking and event-driven automation.
• You’ll collaborate closely with client teams, bringing clear thinking and bold ideas to co-create modern platforms that make a real national-scale difference.
• Act as a senior technical voice across the engagement, influencing platform strategy, design choices and governance guardrails.
• Lead technical workshops and design reviews with client stakeholders and engineering teams.
• Set and evolve platform standards (security, reliability, operability, CI/CD, observability) and help teams adopt them in practice.
• Define SLOs, improve reliability, and lead incident reviews.
• Coach engineers through mentoring, pairing and pragmatic hands-on technical leadership.
• Bring platform-as-a-product thinking: golden paths, reusable capabilities and sustainable operations.
• Remain hands-on, by actively contributing to designs, code, reviews and problem-solving while leading and mentoring others.
• Designing secure-by-default multi-account AWS landing zones (awareness of Azure/GCP patterns also relevant).
• Building internal developer platforms (IDPs) and self-service automation that boost developer experience.
• Deploying and operating hardened Kubernetes platforms (EKS/AKS).
• Creating unified observability stacks with OpenTelemetry, Prometheus and Grafana.
• Delivering cloud-native modernisation and transformation of legacy systems.
• Engineering high-quality CI/CD pipelines with DevSecOps & supply chain integrity.
• Implementing event-driven, automated infrastructure capabilities.
• Driving FinOps and cloud optimisation across complex estates.
• Applying platform-as-a-product thinking to create scalable, reusable capabilities.
• Providing hands-on technical skills & leadership and collaborating with client teams.

• To be successfully appointed to this role you will need to undergo Baseline Personnel Security Standard checks.
• In addition to BPSS, you will also need SC (Security Check) Clearance or to be eligible for this level of clearance (by being a UK resident for at least 5 years and not having left the country for more than 28 consecutive days during this period)
• Будет плюсом: awareness of Azure/GCP patterns also relevant

• Your working location will vary depending on the client engagement, delivery phase, base location, and security requirements. You should expect a mix of home working, Capgemini offices, and client sites. More onsite presence is typically needed for discovery, workshops, and secure environments. This is not a 100% remote appointment.
• To help support wellbeing we have trained ‘Mental Health Champions’ across each of our business areas, and we have invested in wellbeing apps such as Thrive and Peppy.
• You will benefit from Capgemini’s ‘learning for life’ mindset, meaning you will have countless training and development opportunities from think tanks to hackathons, and access to 250,000 courses with numerous external certifications from AWS, Microsoft, Harvard ManageMentor, Cybersecurity qualifications and much more.
• You’ll be joining a professional community of experts, who have got your back and will support you, every step of the way.