About the job
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.
Hybrid Working
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.
Your Role
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.
Scope & Influence as a Senior/Lead Platform Engineer
* 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.
What This Looks Like In Practice
* 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.
Disability Confidence Employer
Capgemini is proud to be a Disability Confidence Employer (Level 2) under the UK Government’s Disability Confidence scheme. As part of our commitment to inclusive recruitment, we will offer an interview to all candidates who declare they have a disability and meet the minimum essential criteria for the role. Please opt in during the application process.
Security Clearance
* Baseline Personnel Security Standard (BPSS). To be successfully appointed you will need to undergo BPSS checks.
* SC (Security Check) Clearance or eligibility for this level of clearance (UK resident for at least 5 years and not having left the country for more than 28 consecutive days during this period).
Benefits
* Access to more than 250,000 courses and external certifications (e.g., AWS, Microsoft, Harvard ManageMentor, Cybersecurity).
* Opportunities for training and development: think tanks, hackathons.
* Wellbeing support: mental health champions, wellbeing apps such as Thrive and Peppy.
* Flexible hybrid working arrangement.
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