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About the Role
We are seeking an AI Platform Engineer to create SDKs, APIs, prompt libraries, agent harnesses, and golden paths to make AI-native engineering the default for our technology teams. You will build and run the shared AI platform, including model access, identity, secrets, monitoring, and integrations with enterprise systems. The role involves designing technical guardrails, security controls, and providing cost and usage visibility. You will partner with other engineers to turn recurring needs into reusable platform capabilities and maintain reliability standards with a focus on Site Reliability Engineering principles. Documentation and knowledge sharing are key to ensuring the platform's resilience.
Responsibilities
- Creating SDKs, APIs, prompt libraries, agent harnesses and golden paths that make AI-native engineering the easy default for our technology teams.
- Building and running the shared AI platform: model access and routing, identity, secrets, monitoring and connectors to enterprise data and collaboration systems.
- Building the integrations and shared context that make enterprise AI services genuinely useful to colleagues across the business, with access that respects existing permissions.
- Designing and implementing technical guardrails and security controls - including audit logging, data isolation and action limits for agentic use - rather than relying on policy alone.
- Providing cost, usage and vendor visibility, and planning for model and provider change so we are never locked in to a single dependency.
- Partnering with the Applied AI Engineer, Tech Leads and AI Ambassadors to turn recurring needs into reusable platform capabilities.
- Keeping the platform to clear reliability and recovery standards, with observability, alerting and runbooks maintained with Site Reliability Engineering.
- Documenting what you build and sharing ownership across the team so the platform never depends on one person.
Requirements
- Practical, hands-on experience with AI tooling in production: coding agents, enterprise AI assistants, model APIs, retrieval-augmented generation and evaluation frameworks.
- Proven experience building and operating production platforms in platform engineering, cloud engineering, DevOps or site reliability, with a developer-experience focus.
- Strong technical skills in Microsoft Azure or equivalent cloud, containers and Kubernetes, infrastructure as code and CI/CD.
- Experience building developer-facing products - SDKs, APIs, templates, golden paths - and measuring their adoption and impact.
- Experience integrating enterprise systems through APIs and connectors with identity, secrets management and role-based access control built in.
- Proficiency in Python and at least one other production language.
- Experience managing cloud cost, capacity and vendor relationships, including FinOps principles.
Skills
- AI tooling
- SDKs
- APIs
- Prompt libraries
- Agent harnesses
- Golden paths
- Model access and routing
- Identity management
- Secrets management
- Monitoring
- Enterprise data integration
- Collaboration systems integration
- Technical guardrails
- Security controls
- Audit logging
- Data isolation
- Action limits
- Cost visibility
- Usage visibility
- Vendor management
- Cloud cost management
- Cloud capacity management
- FinOps principles
- Reliability standards
- Recovery standards
- Observability
- Alerting
- Runbooks
- Site Reliability Engineering
- Documentation
- Knowledge sharing
- Microsoft Azure
- Cloud engineering
- Containers
- Kubernetes
- Infrastructure as code
- CI/CD
- Developer-facing products
- Enterprise systems integration
- Role-based access control
- Python
Location
- Hybrid
- Clapham Junction
Work Type
- Hybrid
About the Company
- We’re one of the UK’s leading fitness businesses with more than one million members, 265+ gyms and ambitious plans to keep growing, making us the UK’s second-largest gym operator by membership and the fourth largest in Europe.
- Our mission is simple: to break down barriers to fitness for all.
- We’re large enough to make a meaningful difference, but agile enough for individuals to influence how we grow.
- Technology, data and new ideas play a central role.
- We’re a people-first business where everyone is encouraged to be themselves.
- We’ve been named one of The Sunday Times Best Places to Work and awarded Investors in People Gold, alongside a recognition of our culture and people.
Equal Opportunity
- We actively encourage applications from a diverse demographic and we are passionate about your culture and value alignment.
- Your application may be reviewed by an AI tool to help assess your suitability based on the information you provide. Automated decision-making is never used - every application is reviewed and all decisions, including whether to progress your application, are made exclusively by a member of our recruitment team. Your data will be handled in accordance with our Privacy Policy and UK GDPR.