Senior Platform Engineer

As a Senior Software Engineer (SaaS), you will join a substantial global engineering organisation and provide leadership to highly skilled engineers in the software platform area. You will be part of a team that follows Agile methodologies to deliver market-leading insurance solutions. This is a new position created as the organisation continues to grow and accelerate the delivery of innovative solutions that harness the latest advances in technology.

The is a dedicated role to work on the evolution of ICT Platform Infrastructure capabilities which are the foundation of many of WTW’s market leading products. You will have worked on large scale and globally deployed SaaS applications that have a mature stack management capability. A sound technical background is essential to be successful in this role with experience in delivering large scale Cloud services.

The Role:

Provide technical input, guidance and leadership to the team (including code quality, best practices, processes, some aspects of release management, etc.).Assist in the design and documenting of solutions meeting functional and non-functional requirements.

Lead by example getting directly involved in the day-to-day delivery of work with hands-on development, following best practices for maintainability, testability and performance.

Participate in sprint planning meetings, daily stand-ups and sprint retrospectives, striving to continuously improve the team velocity, its processes and engineering practices.

Coach and mentor colleagues where appropriate, fostering a collaborative and quality-focused engineering culture.

What you’ll bring

Platform and control plane engineering

Practical experience designing and developing management and control plane capabilities for line of business or SaaS applications, including stack/environment management, API design for platform services, and developer/operator UX.Experience working with or designing Azure stamp-based or scale‑unit architectures, including multi-region or multi-tenant deployments, isolation and blast‑radius reduction, and automated stamp lifecycle management.

SaaS product lifecycle

Demonstrated experience across the full SaaS development lifecycle: requirements analysis, estimation, architecture/design, implementation, unit and system testing, deployment, operations, monitoring and incident management.

Software engineering fundamentals

Strong grounding in object oriented design, design patterns, SOLID principles, clean code practices, code review, documentation and Agile delivery.

Core technical stack

Hands‑on experience with C# and .NET (Core/6+) for backend and service development.

Strong practical experience with Azure cloud and SaaS services (e.g., Container Apps, AKS, Azure Storage, Azure SQL/Cosmos DB, Key Vault, Azure Monitor, Log Analytics).Containers, Container Apps, Kubernetes and microservices

Experience designing, building and operating containerised microservices, including Docker image design, optimisation, Container Apps, Kubernetes (preferably AKS) deployment and scaling strategies, and Kubernetes configuration, secrets and traffic management.

Infrastructure as Code and platform automation

Experience with IaC using Open Tofu or Terraform on Azure, producing modular, reusable, and maintainable infrastructure definitions.

Experience automating environment and stamp provisioning, implementing blue/green or canary deployments, and detecting/remediating infrastructure drift.

CI/CD and Dev Ops Hands ‑on experience building CI/CD pipelines in Azure Dev Ops (Pipelines, Repos), including environments and quality gates.

Familiarity with Git Hub and Git Hub Actions for reusable workflows, build/test/deploy automation and integration with platform tooling.

Automation and testing of infrastructure and platforms

Experience implementing automated testing for infrastructure and platform components, including IaC unit/integration tests, deployment validation, policy‑as‑code (Azure Policy, OPA) and IaC linting.

Security and compliance

Strong understanding of cloud and SaaS security best practices: least privilege, managed identities, secret management, network security, private endpoints, and secure…