About deltaflare
deltaflare is a category-leading UK company delivering a secure, scalable OT cybersecurity platform for essential service operators through phoenix. Built for the gas, water, electricity, and renewables sectors, phoenix provides a trusted digital foundation for long-term operational resilience, secure transformation, and regulatory alignment.
We work with major operators across gas, water, electricity, renewables, and transport, helping them modernise safely and confidently.
The Platform Engineer is responsible for the cloud estate, deployment automation, integration validation, and test infrastructure that ensure phoenix runs reliably, securely, and cost-effectively across deltaflare's own environments and the client environments we deploy into.
Role Purpose
Phoenix is delivered as a working platform across a hybrid estate: deltaflare-operated cloud infrastructure in Azure and AWS, and client environments with their own network topologies, hardware configurations, and operational constraints. The Platform Engineer is accountable for keeping that estate healthy, deploying phoenix into pre-production and production environments using the established blueprint, validating that what is deployed meets requirements, and building the automated test infrastructure that supports release confidence.
The role requires a strong networking and systems foundation, hands-on cloud operations experience across Azure and AWS, fluency with Docker Swarm and infrastructure as code, and a methodical approach to integration validation and test automation. The Platform Engineer also needs enough breadth across the software stack (IaaS, PaaS, SaaS) to triage issues wherever they surface and either resolve them or route them to the right owner with sufficient diagnostic detail.
The role sits within the Technology function and reports to the Head of Technology. Cloud optimisation, platform security review, and the broader technology agenda sit within that business unit's remit; the Platform Engineer contributes to that agenda day-to-day. The Platform Engineer also supports the Head of Assurance in meeting deltaflare's internal and external obligations, providing the integration, deployment, and test evidence that assurance activity and regulatory engagement depend on. Training on phoenix architecture, the blueprint methodology, and the OT environments the platform operates in will be provided.
Key Responsibilities
1. Cloud Estate Operations
Operate deltaflare's Azure and AWS estate day-to-day, contributing to the Technology function's wider remit for cloud optimisation, availability, and security. Manage, maintain, and continuously improve the environments, with explicit responsibility for performance, cost optimisation, and the security posture of what runs on them. Establish and maintain monitoring, alerting, and operational runbooks.
2. Blueprint Deployment
Deploy the phoenix blueprint (Docker Swarm and AWS infrastructure as code) into pre-production and production environments. Maintain and evolve the deployment automation so releases are repeatable, auditable, and low-risk. Take delivered phoenix software and stand it up in target environments to meet the deployment specification.
3. Test Environment and Test Infrastructure Support
Provide and maintain the test environments and supporting infrastructure that the product/test engineer relies on for test automation. Ensure environments are stable, representative of production, and aligned with the deployment configurations under test. Build infrastructure-level test capabilities (IaC validation, deployment smoke tests, environment health checks) as part of the platform layer, complementing the product-level test work owned by the product/test engineer.
4. Integration Validation
Validate phoenix integration across different deployment configurations and blueprints. Confirm each integration behaves as designed at the technical level and produce the deployment evidence that supports broader sign-off. Identify, document, and communicate any integration failures, gaps, or deviations clearly and promptly.
5. Blueprint Development and Maintenance
Build and maintain the deployment blueprints that define how phoenix is configured across different client applications, sectors, and hardware tiers. Ensure blueprints are accurate, current, and documented to a standard that supports repeatable deployment and client handover.
6. Full-Stack Triage
When issues surface, whether in the IaaS, PaaS, or SaaS layers, in application code, networking, or the underlying OT environment, lead triage with enough breadth across the stack to localise the problem quickly. Either resolve it directly or route it to the right owner with sufficient diagnostic detail to support root cause analysis.
7. URS Validation Support
Support the product/test engineer and the Head of Assurance in their URS validation work by providing deployment evidence and platform-layer context. Where the URS makes platform-layer demands (infrastructure topology, network segregation, hardening, monitoring, change control), ensure those demands are met in deployment and clearly documented. Flag platform-layer URS ambiguities to the relevant owner before they become deployment issues.
8. Release Notes and Technical Documentation
Write clear, accurate release notes for each platform release, capturing changes, dependencies, known issues, and deployment guidance. Maintain technical documentation that is accessible to assurance, development, and client-facing colleagues. Treat documentation as a core deliverable, not an afterthought.
9. Development Team Liaison
Participate in development planning cycles, providing input from a deployment, operations, and test perspective. Flag issues encountered during integration validation or in production back to the development team with sufficient detail to support resolution. Contribute to improving the handover process between development and deployment.
10. Assurance Support
Support the Head of Assurance in meeting deltaflare's internal and external obligations. Produce integration, deployment, and test evidence for release gates, operator engagement, and regulatory review. Contribute to maintaining deltaflare's always-audit-ready posture by ensuring records are complete and current.
Leadership Expectations
Own the cloud estate and deployment pipeline end to end and be accountable for what runs on it. Be rigorous: in OT environments, undocumented or partially validated configurations carry real risk. Communicate clearly with both technical and non-technical colleagues. Bring problems to the surface early rather than working around them quietly. Default to automation over manual operation.
How Success Will Be Measured
- Azure and AWS estate operated within agreed availability, cost, and security targets.
- Phoenix deployed into pre-production and production reliably and repeatably from the blueprint.
- Test environments and supporting test infrastructure stable, current, and available for the product/test engineer's automation work across every release cycle.
- Platform-layer deployment evidence provided to support URS sign-off before release; technical integration validated for every deployment.
- Blueprint library maintained, current, and covering all active client configurations.
- Release notes produced to a consistent standard on every release cycle.
- Integration and production issues fed back to the development team with sufficient clarity to support resolution.
- Assurance documentation complete and audit-ready at all times.
Further KPIs will be developed and agreed jointly with the Head of Technology.
Pay: £68,000.00-£78,000.00 per year
Benefits:
Ability to commute/relocate:
- Richmond TW9 1DL: reliably commute or plan to relocate before starting work (required)
Application question(s):
- How many years of experience do you have in platform engineering, cloud engineering, or DevOps?
- Have you built and maintained Infrastructure as Code (Terraform, CloudFormation, Ansible or similar) in a production environment?
- Have you owned production workloads on Microsoft Azure, AWS, or both?
Experience:
- AWS: 3 years (required)
- Infrastructure as Code: 2 years (required)
- Platform Engineering: 3 years (required)
Work Location: In person
