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 / Incentivos
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 xqbhyrx Bash and at 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

📌 Senior DevOps Engineer, CI/CD Platform (Developer Experience) (Barcelona)
🏢 Factorial Hr
📍 Barcelona