Senior DevOps Engineer (London) - Selby Jennings

Senior DevOps Engineer | Platform Engineering

Our client is an exceptional technology-driven investment firm, recognised for building one of the most advanced engineering environments in the industry. With significant investment in Platform Engineering, DevOps, and developer productivity, they are scaling the platforms that power software delivery across a global business. From CI/CD infrastructure executing millions of builds annually to the tooling that enables engineers to develop, test, and deploy at scale, this team sits at the centre of innovation and engineering excellence.

They are looking for a highly motivated Senior DevOps Engineer who thrives on automation, scalability, and solving complex engineering challenges. The ideal candidate will bring a strong DevOps mindset, combining software engineering expertise with a passion for building developer platforms, enhancing CI/CD capabilities, and driving operational excellence. This is an opportunity to shape the future of DevOps within a world-class technology organisation, working on highly visible platforms that have a direct impact across engineering, data, and investment teams. A proactive attitude, strong sense of ownership, and a genuine desire to improve systems and processes are essential.

Key Responsibilities

• Design, build, and automate scalable CI/CD platforms supporting millions of build and deployment activities each year.
• Develop platform capabilities that improve developer productivity, software delivery speed, and operational efficiency.
• Champion DevOps and SRE best practices across automation, observability, infrastructure as code, and platform operations.
• Build resilient deployment pipelines that enable self-service software delivery and reduce operational overhead.
• Manage and optimise large-scale Kubernetes environments supporting business-critical applications.
• Collaborate with software engineering, data, infrastructure, and business teams to enhance platform reliability and scalability.
• Develop tooling and automation that improves service stability, fault tolerance, and developer experience.
• Architect and maintain highly available infrastructure supporting critical software development workflows.
• Enhance monitoring, logging, alerting, and observability capabilities across cloud and on-premise environments.
• Participate in on-call rotations and incident response, helping maintain high levels of platform reliability.

Key Skills & Experience

• 7+ years of experience in DevOps, Site Reliability Engineering, or Platform Engineering within complex distributed environments.
• Strong software engineering experience with Python and/or Go.
• Deep expertise with CI/CD technologies, including Jenkins, GitHub Actions, Octopus Deploy, or similar platforms.
• Proven experience automating software development lifecycle processes at scale.
• Experience supporting critical infrastructure and platforms serving millions of requests per day.
• Strong background designing and implementing scalable, reliable, and testable infrastructure solutions.
• Deep expertise with Kubernetes and containerised environments.
• Experience building and maintaining RESTful APIs.
• Strong knowledge of Infrastructure as Code, including Terraform and Kubernetes Operators.
• Experience with observability platforms covering monitoring, logging, metrics, and alerting.
• Exposure to both AWS and on-premise infrastructure environments.