Senior Platform Engineer
WTW
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Benefits offered by this job
Job summary
WTW is seeking a Senior Software Engineer (SaaS) to join a global engineering team. You will provide technical leadership, hands-on development, and drive best practices across platform services and cloud infrastructure.
You will work on Azure-based, multi-region SaaS systems, guide architecture and deliver secure, scalable software, while mentoring engineers in an agile environment with a strong focus on quality and performance.
Qualifications
- Leadership and mentoring experience in large teams.
- Strong background in OO design, SOLID, and clean code.
- Proven expertise with C#/.NET backend and cloud SaaS platforms.
- Experience with Azure services and containerized microservices.
Responsibilities
- Provide technical input, guidance and leadership to the team.
- Design and document solutions for functional and non-functional requirements.
- Lead by example with hands-on development and quality practices.
- Participate in sprint ceremonies and improve team velocity.
Skills
Education
Tools
Job description
This job is with WTW, an inclusive employer and a member of myGwork - the largest global platform for the LGBTQ+ business community.
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.
- 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.
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.
Demonstrated experience across the full SaaS development lifecycle: requirements analysis, estimation, architecture/design, implementation, unit and system testing, deployment, operations, monitoring and incident management.
Strong grounding in object oriented design, design patterns, SOLID principles, clean code practices, code review, documentation and Agile delivery.
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).
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.
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.
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.
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.
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.
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.
- 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.
- 25 days of annual leave plus an extra WTW day to relax and recharge
- private healthcare
- life insurance
- group income protection
- regular health assessments
- defined contribution pension scheme, featuring matched contributions up to 10% from the company
- hybrid working options
- employee assistance programme
- fully paid volunteer day to make a difference in your community
- electric vehicle car scheme
- share scheme
- cycle‑to‑work programme
- dental and optical cover
- critical illness protection
We're committed to equal employment opportunity and provide application, interview and workplace adjustments and accommodations to all applicants. If you foresee any barriers, from the application process through to joining WTW, please email
(ICT_TECH TD_2026_24)
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