Senior Platform Engineer

Janus Henderson Investors; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Hybrid working

Health & Wellbeing benefits

Volunteer time

Professional development reimbursement

Parental leave benefits

Networking & social events

Lunch allowance

Job summary

Janus Henderson Investors is seeking a Senior Engineer in Platform Engineering to lead the design and delivery of CI/CD capabilities, focusing on Azure DevOps-to-GitHub migration, IaC tooling, and secure, scalable cloud platforms. You will drive security, automation, and self-service across engineering teams.

You will mentor juniors, collaborate with AI/Architecture/Cloud teams, and support governance, compliance, and audit processes within a hybrid work environment in the UK.

Qualifications

• Degree in Computer Science, Engineering, or a related field.
• 6+ years in platform engineering, DevOps, or infrastructure roles.
• Strong cloud experience with Azure preferred.
• Proficiency in CI/CD tooling and Infrastructure as Code (IaC).

Responsibilities

• Lead migration from Azure DevOps to GitHub and standardised CI/CD pipelines.
• Develop and maintain IaC solutions with Terraform, Bicep, or similar.
• Deliver and optimise Azure cloud platforms for scalability and cost-efficiency.
• Embed security controls in pipelines using Veracode and other tools.
• Enable DevOps for Snowflake and Databricks with CI/CD integration.
• Promote platform standardisation and self-service capabilities.

Skills

DevOps transformation

Azure cloud

CI/CD pipelines

IaC (Terraform, Bicep)

GitHub Actions

Security practices

SRE practices

Automation mindset

Platform engineering

Auditing & compliance

Education

Bachelor's or Master's in CS/Engineering

Tools

Terraform

Bicep

Azure DevOps

GitHub

Nexus

Veracode

Pulumi

Kubernetes

Docker

Job description

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Division: Infrastructure & Cloud Operations

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 in Platform Engineering, you will lead the design, delivery and evolution of JHI's CI/CD capabilities, enabling consistent, secure and scalable software delivery across the enterprise. Combining DevOps engineering, platform architecture and developer experience, you will focus on the Azure DevOps-to-GitHub transition, platform tooling and integration with Snowflake and Databricks. As a subject matter expert in DevOps tooling, automation and platform reliability, you will promote best practice, standardisation and self-service capabilities across engineering teams.

• 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.
• Represent Platform Engineering in External and internal audit engagements, clearly explaining controls, providing accurate evidence, responding to findings, and driving remediation actions to closure.
• Drive developer experience improvements through platform standardisation, self-service tooling, templates, and AI-enabled capabilities (e.g., Copilot, intelligent automation).
• Collaborate with AI Team, 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
• 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, including self-service provisioning, reusable templates, and platform standardisation
• Solid understanding of software development lifecycle (SDLC), release engineering, and environment lifecycle management
• Experience working with data platforms (Snowflake and/or Databricks), including CI/CD integration, environment provisioning, and access control models
• Strong knowledge of containerisation and cloud-native technologies (Docker, Kubernetes)
• Experience with observability and monitoring frameworks (e.g., Azure Monitor, Prometheus, Grafana) and understanding of SRE practices (SLIs/SLOs, reliability engineering)
• Strong scripting/programming skills (Python, PowerShell, Bash) and automation mindset
• Good understanding of security, networking, RBAC, and Zero Trust principles in cloud and DevOps environments
• Exposure to AI-enabled developer tooling (e.g., GitHub Copilot, intelligent automation) and improving developer experience
• Experience operating in regulated, enterprise-scale environments with strong focus on governance, auditability, and compliance
• Strong communication, collaboration, and stakeholder management skills, with ability to act as a hands-on SME and technical leader

Nice to have skills

• Certifications in cloud technologies or Kubernetes.
• Experience building or contributing to an Internal Developer Platform (IDP)
• Familiarity with service mesh, API gateways, and platform observability tools
• Knowledge of FinOps, cost optimization, and cloud governance
• Solid programming skills (Python, Go, or Java)
• Strong understanding of networking, security, and system architecture
• Experience building or contributing to an Internal Developer Platform (IDP)
• Exposure to AI-enabled development (e.g., GitHub Copilot, automation workflows)
• Knowledge of FinOps, cost optimisation, and cloud governance
• Relevant cloud or Kubernetes certifications

Supervisory responsibilities

• No

Potential for growth

• Regular training
• Continuing education courses
• Cross functional collaboration

You will be expected to understand the regulatory obligations of the firm and abide by the regulated entity requirements and JHI policies applicable for your role.

At Janus Henderson Investors we're committed to an inclusive and supportive environment. We believe diversity improves results and we welcome applications from candidates from all backgrounds. Don't worry if you don't think you tick every box, we still want to hear from you! We understand everyone has different commitments and while we can't accommodate every flexible working request, we're happy to be asked about work flexibility and our hybrid working environment. If you need any reasonable accommodations during our recruitment process, please get in touch and let us know at [e-mail]

Annual Bonus Opportunity:

Position may be eligible to receive an annual discretionary bonus award from the profit pool. The profit pool is funded based on Company profits. Individual bonuses are determined based on Company, department, team and individual performance.

Benefits:

Janus Henderson is committed to offering a comprehensive total rewards package to eligible employees that includes; competitive compensation, pension/retirement plans, and various health, wellbeing and lifestyle benefits. To learn more about our offerings please visit the Why Join Us section on the career page here .

Janus Henderson Investors is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. All applications are subject to background checks.

Janus Henderson (including its subsidiaries) will not maintain existing or sponsor new industry registrations or licenses where not supported by an employee’s job functions (as determined by Janus Henderson at its sole discretion).

You should be willing to adhere to the provisions of our Investment Advisory Code of Ethics related to personal securities activities and other disclosure and certification requirements, including past political contributions and political activities. Applicants' past political contributions or activity may impact applicants' eligibility for this position.

You will be expected to understand the regulatory obligations of the firm, and abide by the regulated entity requirements and JHI policies applicable for your role.