Senior Platform Engineer (12 month FTC)

At Gallagher Benefit Services, you’re a trusted partner to organizations navigating some of their most important people decisions. We help clients build better workplaces, where people feel supported, empowered, and inspired to thrive. Whether it’s shaping benefit strategies, designing wellbeing programs, or advising on workforce challenges, the work you do here creates meaningful change for businesses and the people who power them.

Our agile development team are responsible for building internal and client-facing applications, including research, data, analytics and interactive investment tools. We delivered these through both web interfaces and function libraries. We make a big impact on the business and believe in continuous improvement and learning with dedicated Learning & Development days each sprint as well as access to a learning platform.

We are seeking a highly skilled Platform Engineer to join our innovative team and help build the foundation that enables our developers to deliver world‑class software. This role is perfect for someone who understands software development principles, particularly in C# and .NET. We are about to start a major update to our cloud platform, including migration to a new Azure environment, updates to build and deployment tooling, additional containerisation and IaC, as well as technical upgrades to existing services. Additionally, you will be responsible for enhancing the platform by integrating new cloud capabilities, refining development and deployment processes, and providing expertise in SDLC automation across various toolchains.

Responsibilities include:

• Infrastructure Management: Design, build, and maintain the underlying infrastructure that supports software applications, including servers, networks, and storage systems.
• Automation: Develop and implement automation scripts and tools to streamline deployment, scaling, and management of infrastructure. This includes using Infrastructure as Code (IaC) tools like Terraform.
• Monitoring and Performance Tuning: Set up monitoring tools to track system performance and ensure high availability. Optimize system performance and troubleshoot issues as they arise.
• Security: Implement security best practices to protect the platform from vulnerabilities and threats. This includes managing access controls and ensuring compliance with relevant regulations.
• Collaboration: Work closely with development, TechOps, and Product to ensure the platform meets the needs of the organization.
• Continuous Integration/Continuous Deployment (CI/CD): Set up and maintain CI/CD pipelines to automate the testing and deployment of applications. Ensure that code changes are integrated and deployed smoothly.
• Scalability and Reliability: Design systems that can scale efficiently to handle increased load and ensure reliability. Implement redundancy and failover mechanisms to minimize downtime.
• Documentation: Create and maintain comprehensive documentation for the platform, including architecture diagrams.
• Innovation and Improvement: Stay up-to-date with the latest technologies and industry trends. Continuously seek ways to improve the platform’s performance, reliability, and efficiency.
• Support and Troubleshooting: Provide support for the platform, including responding to incidents and resolving issues. Ensure that the platform is running smoothly and efficiently.

About you:

• Solid understanding of C#/.NET development principles to collaborate effectively with engineering teams.
• Ability to work across DevOps, SRE, and development teams to create seamless developer experiences.
• IaC Tooling: Terraform, Terragrunt.
• Azure cloud services, Entra ID, Azure CLI, Azure PowerShell.
• Azure DevOps Pipelines.
• Kubernetes, Helm, and Docker containers.
• WSL2/Linux systems and concepts.
• Virtual Networking concepts and fundamentals (subnetting, routing, DNS).
• PowerShell Core 7 and Pester test automation.
• Understanding of secure coding practices and vulnerability management.

It would be great if you also have the following skills and experience:

• .NET Framework 4.7.2+ application development and hosting.
• Dotnet and MSBuild SDK experience.
• TeamCity, Octopus Deploy, GitHub Actions.
• Windows systems and concepts.
• Windows PowerShell 5.1, shell.
• AWS cloud services, Cognito, AWS CLI.
• Node.
• Experience with Angular applications, Python.

Compensation and benefits:

• Minimum of 25 days holiday, plus bank holidays, and the option to ‘buy’ extra days.
• Defined contribution pension scheme, which Gallagher will also contribute to.
• Life insurance, which will pay 4x your basic annual salary, which you can top‑up to 10x.
• Income protection, we’ll cover up to 50% of your annual income, with options to top up.
• Health cash plan or Private medical insurance.

Other benefits include:

• Three fully paid volunteering days per year.
• Employee Stock Purchase plan, offering company shares at a discount.
• Share incentive plan, HMRC approved, tax effective, stock purchase plan.
• Critical illness cover.
• Discounted gym membership, with over 3,000 gyms nationally.
• Season ticket loan.
• Access to a discounted voucher portal to save money on your weekly shop or next big purchase.
• Emergency back‑up family care.
• And many more…

We value inclusion and diversity. Inclusion and diversity (I&D) is a core part of our business, and it’s embedded into the fabric of our organisation. For more than 95 years, Gallagher has led with a commitment to sustainability and to support the communities where we live and work. Gallagher embraces our employees’ diverse identities, experiences and talents, allowing us to better serve our clients and communities. We see inclusion as a conscious commitment and diversity as a vital strength. By embracing diversity in all its forms, we live out The Gallagher Way to its fullest.

Gallagher is Disability Confident Committed. We have pledged to make sure our recruitment process is inclusive and accessible, in addition to supporting our existing employees with any long‑term health conditions or disabilities. We understand that applicants may have disabilities; if you do, you may find some parts of the recruitment process more challenging than others. Don’t worry, we’re here to help, however, we can only do this if you let us know. Should you require reasonable adjustments to your application, please get in touch with us.

Our employing entity, Arthur J. Gallagher Services (UK) Limited, is proud to be accredited as a Living Wage employer with the Living Wage Foundation. We are committed to diversity and opportunity for all and are opposed to any form of less favourable treatment on the grounds of gender or gender identity, marital status, parental status, race, ethnicity, colour, nationality, disability, sexual orientation, religion/ belief, age and those with caring responsibilities. Gallagher believes that all persons are entitled to equal employment opportunity and prohibits any form of discrimination by its managers, employees, vendors or customers based on race, color, religion, creed, gender (including pregnancy status), sexual orientation, gender identity (which includes transgender and other gender non‑conforming individuals), gender expression, hair expression, marital status, parental status, age, national origin, ancestry, disability, medical condition, genetic information, veteran or military status, citizenship status, or any other characteristic protected (herein referred to as “protected characteristics”) by applicable federal, state, or local laws.

Equal employment opportunity will be extended in all aspects of the employer‑employee relationship, including, but not limited to, recruitment, hiring, training, promotion, transfer, demotion, compensation, benefits, layoff, and termination. In addition, Gallagher will make reasonable accommodations to known physical or mental limitations of an otherwise qualified person with a disability, unless the accommodation would impose an undue hardship on the operation of our business.