Senior DevOps Engineer, CI/CD Platform (Developer Experience) - barcelona

Overview
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As a Senior Platform Engineer, you own the CI/CD Kubernetes platform end to end, shaping capacity, reliability, upgrades, security, and cost. You work with a cross-functional engineering team to keep a self-hosted runner fleet fast and scalable for hundreds of developers. You’ll drive performance improvements, manage bare-metal infrastructure, and turn incident learnings into robust runbooks and guardrails. This role blends hands-on infrastructure with product-minded collaboration to make builds faster and more predictable.

Compensaciones / Beneficios

• Alan private health insurance
• Wellhub fitness facilities
• Cobee expense savings
• Language classes
• Office breakfast and organic fruit
• Pet-friendly office

Responsabilidades

• Rightsize runner tiers using weekly CPU/memory data and update deployment via pull requests
• Investigate and fix flaky CI jobs by tracing issues to container runtime, kernel, or clock drift
• Add and onboard machines to the runner fleet with provisioning and networking
• Reduce queue wait times by identifying blockers across pipeline stages
• Upgrade clusters or controllers without disrupting users
• Collaborate with product engineers to optimize workflows that are slow for a reason
• Own incident response for the platform, run blameless postmortems, and implement alerts and runbooks
• Operate bare metal infrastructure with focus on Linux, networking, and troubleshooting

Requisitos principales

• 5+ years of production infrastructure with Kubernetes at the core
• Deep knowledge of Kubernetes scheduling, resources, evictions, node pressure, DaemonSets, controllers and operators
• Strong Linux and container fundamentals (containerd or Docker, cgroups, storage, networking)
• Terraform and infrastructure-as-code, with modular design and state hygiene
• CI/CD at platform level; GitHub Actions experience including self-hosted runners
• Scripting in Bash and at xkdbapo least one of Python or Go
• Observability with metrics, logs, traces; OpenTelemetry and Prometheus tooling
• Operational maturity: on-call, incident command, postmortems
• Capacity and cost awareness; ability to size a fleet and explain billing
• Clear written English and documentation skills

• Collaborative mindset
• Problem-solving and ownership
• Communication and ability to translate tech details for engineers
• Kubernetes architecture and operations (scheduling, limits, evictions, DaemonSets, operators)
• Bare-metal provisioning and troubleshooting
• GitHub Actions runner platform and runner controller concepts