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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Platform Engineer - **Company:** Willis Towers Watson - **Location:** Reigate, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Clean Code Principles, .NET Framework, Agile Methodology, Artificial Intelligence, Computing Platforms, Automation of Tests, Microsoft Azure, Software as a Service, Cloud Computing, Cloud Computing Security, Software Quality, Code Review, Continuous Integration, Software Design Patterns, DevOps, Github, Identity and Access Management, Network Security, Log Analysis, SQL Azure, Routing, OAuth, Object-Oriented Software Development, OpenID, Scrum Methodology, Role-Based Access Control, Release Management, Azure Active Directory, Cloud Services, JSON Web Token, Service Development Studio, System Testing, Azure Service Bus, Policy as Code, Data Logging, Cloud Monitoring, Backend, Event Driven Architecture, Integration Tests, Solid Principles, Kubernetes, Infrastructure Automation Frameworks, Information Technology, Low Latency, Apache Kafka, Cosmos DB, Azure AKS, Api Design, Terraform, Dynatrace, Api Management, Docker, Key Vault, Microservices - **Published:** September 8, 2026 - **Apply:** https://www.collegerecruiter.com/job/2840575472-senior-platform-engineer ## About the Role 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., What you'll bring * Platform and controlplane engineering + Practical experience designing and developing management and controlplane capabilities for lineofbusiness 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 OpenTofu 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 DevOps + Hands-on experience building CI/CD pipelines in Azure DevOps (Pipelines, Repos), including environments and quality gates. + Familiarity with GitHub and GitHub 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 software supply chain practices (image scanning, SBOM, dependency governance). + Awareness of compliance, data residency and multi-region considerations in multi-tenant Azure environments. * Technical leadership and communication + Ability to run proofs of concept with emerging technologies and present outcomes to both technical and non-technical audiences. + Comfortable partnering with application teams to gather requirements and shape platform capabilities. Other highly desirable, but not essential skills are: * Microsoft Azure certifications (e.g., AZ-204, AZ-400, AZ-305). * Kubernetes certifications (e.g., CKA, CKAD, CKS). * Degree in Computer Science, Engineering, Mathematics or equivalent industry experience. * Experience with high-volume, low-latency SaaS systems. * Experience with distributed and event-driven architectures (Azure Service Bus, Event Hubs, Event Grid, Kafka). * Experience building multi-tenant architectures, including tenant provisioning, routing and per-tenant configuration/quota management. * Experience with Azure ingress and global routing solutions such as Azure Front Door, Application Gateway, and Azure API Management. * Experience with identity and access management using Azure AD/Entra ID, B2B, RBAC, OAuth2, OIDC, JWT and claims-based authorisation. * Experience in platform engineering or SRE roles: building internal platforms, defining SLIs/SLOs, managing error budgets, and implementing observability (centralised logging, metrics, distributed tracing). * Strong awareness of emerging cloud, AI, DevOps and platform technologies, with an understanding of their applicability to SaaS platforms. * General knowledge of the insurance industry or other regulated domains. ## Description 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., * 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. ## Related Videos - [Reducing Cognitive Overload Through Platform Engineering](https://www.wearedevelopers.com/videos/679-reducing-cognitive-overload-through-platform-engineering) - [Keeping applications secure by evolving OAuth 2.0 and OpenID Connect](https://www.wearedevelopers.com/videos/100152-keeping-applications-secure-by-evolving-oauth-2-0-and-openid-connect) - [Innovating Developer Tools with AI: Insights from GitHub Next](https://www.wearedevelopers.com/videos/1268-innovating-developer-tools-with-ai-insights-from-github-next) - [Shifting Stress to Progress— Understanding DevOps to do DevOps Better](https://www.wearedevelopers.com/videos/268-shifting-stress-to-progress-understanding-devops-to-do-devops-better) - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [Platform Engineering vs. DevOps Why not both?](https://www.wearedevelopers.com/videos/885-platform-engineering-vs-devops-why-not-both) ## Related Articles - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [The 12 Best Jobs for Software Engineers](https://www.wearedevelopers.com/magazine/401-the-12-best-jobs-for-software-engineers) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)