Senior Engineer- Platform Engineering

About the role

Why work for us? A career at Janus Henderson is more than a job, it's about investing in a brighter future together. Our Mission at Janus Henderson is to help clients define and achieve superior financial outcomes through differentiated insights, disciplined investments, and world-class service. We will do this by protecting and growing our core business, amplifying our strengths and diversifying where we have the right. Our Values are key to driving our success, and are at the heart of everything we do: Clients Come First - Always | Execution Supersedes Intention | Together We Win | Diversity Improves Results | Truth Builds Trust If our mission, values, and purpose align with your own, we would love to hear from you! Your opportunity As a Senior Engineer within Platform Engineering, you will lead the design, build, and evolution of our Internal Developer Platform (IDP), enabling consistent, secure, and scalable software delivery across the enterprise. This role combines DevOps engineering, platform architecture, and developer experience enablement, with a strong focus on CI/CD transformation (Azure DevOps to GitHub), platform tooling, and data platform integration (Snowflake, Databricks). You will act as a subject matter expert (SME) across DevOps tooling, automation, and platform reliability-driving best practices, standardisation, and selfservice capabilities for engineering teams. Design, build, and evolve enterprise platform services to support the Internal Developer Platform (IDP) and enable scalable, secure, and self-service engineering environments. Lead DevOps transformation initiatives, including migration from Azure DevOps to GitHub, and implement standardised CI/CD pipelines, reusable workflows, and release automation frameworks. Develop and maintain Infrastructure-as-Code (IaC) solutions using Terraform, Bicep, or similar tools to provision and manage cloud infrastructure. Deliver and optimise cloud-native platforms on Azure (primary), ensuring scalability, resilience, and cost efficiency. Act as SME across DevOps tooling, including GitHub (Actions, Advanced Security), Nexus (artifact management), and Veracode (application security), embedding security controls into pipelines and platform services. Enable and support DevOps practices for core data platforms, including Snowflake and Databricks, covering environment provisioning, CI/CD integration, and access control models. Implement observability frameworks, including monitoring, logging, and alerting, and contribute to SRE practices such as SLIs/SLOs, reliability engineering, and incident management. Embed security and compliance standards into all platform components, ensuring auditability, policy enforcement, and alignment with enterprise governance requirements. Drive developer experience improvements through platform standardisation, self-service tooling, templates, and AI-enabled capabilities (e.g., Copilot, intelligent automation). Collaborate with Architecture, Cloud COE, SRE, and engineering teams to deliver consistent and governed platform capabilities across the organisation. Mentor junior engineers and contribute to technical leadership, standards definition, and engineering best practices. What to expect when you join our firm Hybrid working and reasonable accommodations Generous Holiday policies Excellent Health and Wellbeing benefits including corporate membership to Wellhub Paid volunteer time to step away from your desk and into the community Support to grow through professional development courses, tuition/qualification reimbursement and more Maternal/paternal leave benefits and family services All employee events including networking opportunities and social activities Lunch allowance for use within our subsidized onsite canteen Must have skills Bachelor's or master's in computer science, Engineering, or related field 6+ years of experience in platform engineering, DevOps, or infrastructure roles Strong experience with cloud platforms (Azure preferred) Proficiency in containerization (Docker, Kubernetes) Hands-on with CI/CD tools (GitHub, Azure DevOps, GitLab CI) Experience with IaC tools (Terraform, Pulumi, Ansible) Strong experience in DevOps, Platform Engineering, or Infrastructure Engineering roles within enterprise environments Proven expertise in CI/CD pipeline design, automation, and standardisation using GitHub (Actions, Advanced Security) and Azure DevOps, including migration from ADO to GitHub Deep hands-on experience with Infrastructure-as-Code (Terraform, Bicep or equivalent) and automated cloud provisioning Strong knowledge of Azure cloud platform, including compute, networking, identity, and security services Experience implementing DevSecOps practices, including integration of SAST/DAST tools (e.g., Veracode), secrets management, and secure pipeline execution Expertise in artifact management (e.g., Nexus) and modern DevOps tooling ecosystems Experience enabling Internal Developer Platform (IDP) capabilities, in

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