Principal Platform Engineer
Role details
Job location
Tech stack
Job description
- Define and own the unified cloud + on-prem platform architecture, spanning AWS and customer-hosted environments.
- Design systems that operate reliably across hybrid, semi-air-gapped, and regulated deployments.
- Act as the final decision-maker on platform architecture, tooling, and vendors.
Drive automation-first infrastructure
- Lead full automation across the platform using Infrastructure as Code, GitOps, and CI/CD.
- Ensure environments are reproducible, auditable, and recoverable by design.
- Eliminate manual operations wherever possible.
Reliability, uptime & operational excellence
- Own availability targets across 20+ clusters, 4 regions, and multiple environments.
- Design and operate systems targeting 99.99% uptime, with clear SLOs, SLIs, and incident processes.
- Improve observability, alerting, incident response, and post-mortem culture.
Security & compliance by design
- Embed security deeply into platform architecture and delivery pipelines.
- Own platform alignment with ISO 27001 and GxP requirements.
- Reduce attack surface through simplification, standardisation, and automation.
Cost optimisation & platform efficiency
- Continuously optimise infrastructure cost without compromising reliability or security.
- Make cost trade-offs visible and intentional.
- Remove wasteful tooling, over-provisioning, and unnecessary platform complexity.
Data & ML platform enablement
- Support reliable execution of data pipelines and ML workflows within the platform.
- Partner with data and ML teams to ensure pipelines are scalable, secure, and operationally sound.
Lead senior platform engineers
- Lead and inspire Staff-level Platform Engineers.
- Set execution standards, delivery cadence, and technical expectations.
- Improve platform engineering culture, visibility, and predictability.
Partner with product and engineering leadership
- Translate product intent and operational requirements into platform architecture, roadmaps, and timelines.
- Operate as an execution partner to product teams and an advisory partner where appropriate.
- Provide clear, regular visibility into platform health, risks, and progress.
Requirements
Do you have experience in Kubernetes?, An outcome-driven platform leader.
- You obsess over reliability, automation, and operational excellence.
- You believe the best platform is often the simplest possible one - fewer tools, fewer vendors, fewer moving parts.
- You are calm under pressure and experienced running systems that must be available 24/7.
- You are opinionated, but grounded in evidence, trade-offs, and real-world constraints.
- You communicate clearly and regularly, providing visibility into platform health, risks, and progress.
- You enjoy leading senior engineers, setting high standards, and building a culture of ownership and accountability.
- You are comfortable working across startups, scale-ups, and enterprise contexts - and know which practices belong where.
- You take pride in building platforms that are secure, cost-efficient, low-latency, and boring in the best possible way., * Significant years of proven experience in platform, infrastructure, or SRE-focused engineering roles.
- Deep experience operating mission-critical, 24/7 systems with strict uptime requirements.
- Strong hands-on experience with Kubernetes, containerisation, CI/CD, IaC, and GitOps.
- Proven track record running hybrid cloud + on-prem platforms.
- Strong understanding of cloud economics and cost optimisation.
- Solid security mindset, including experience with regulated environments.
- Experience leading or heavily influencing senior platform engineers.
- Background across both startups/scale-ups and enterprise environments.
Benefits & conditions
If you care about elegant systems, ruthless simplification, and platforms that work under real-world constraints, this role will stretch and reward you.
UK Team Benefits:
Vitality Health Insurance
Eye Care
Salary Sacrifice - EV
Salary Sacrifice - Bike & Tech
- ️ Wellbeing & Support
- ️ Wellbeing & Development Allowance
Spill & Employee Assistance Programme
Additional Leave
Pension Scheme
Group Life & Critical Illness cover