Senior DevOps Engineer - Self-Hosted CI/CD at Scale

Factorial HR; Madrid; Híbrido; EUR 90.000 - 130.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Alan health insurance

Wellhub fitness benefits

Cobee perks

Language classes

Office breakfast

Descripción de la vacante

Factorial is looking for a senior Kubernetes platform engineer to own the CI/CD Kubernetes clusters end to end. You will manage capacity, reliability, upgrades, security, and cost across a large self-hosted runner fleet in European datacentres.

You will scale and run Actions Runner Controller with runner scale sets, episodic pods, and image caches. A strong Linux, IaC, and observability background is essential to reduce queue wait and improve build efficiency.

Formación

• 5+ years running production infrastructure with Kubernetes at the centre.
• Deep Kubernetes knowledge: scheduling, limits, evictions, node pressure, DaemonSets, controllers and operators.
• Strong Linux and container fundamentals (containerd/Docker, cgroups, namespaces).
• Terraform and IaC with good module design and state hygiene.
• CI/CD at the platform level: shared workflows, templates, runner architecture, build caching.
• Comfortable with GitHub Actions and self-hosted runners.
• Scripting: Bash, plus Python or Go.
• Observability: metrics, logs, traces, dashboards; OpenTelemetry and Prometheus tooling.
• Operational maturity: on-call, incident command, postmortems.
• Capacity and cost awareness; size a fleet and explain the bill.
• Clear written English; document what you build.

Responsabilidades

• Rightsize runner tiers based on CPU/memory data.
• Track flaky job from red check to container/runtime.
• Add machines to the fleet: install, enrol, network, verify, document.
• Reduce queue wait by identifying bottlenecks.
• Upgrade a cluster or controller without disruption.
• Collaborate with a product engineer on slow workflows.

Conocimientos

Kubernetes

Production Infra

Linux Fundamentals

Terraform

CI/CD

GitHub Actions

Scripting Bash

Python

Observability

On-call

Cost Awareness

Herramientas

Flux

Argo CD

Kustomize

Helm

Terraform

Descripción del empleo

Factorial is looking for a senior Kubernetes platform engineer to own the CI/CD Kubernetes clusters end to end. You will manage capacity, reliability, upgrades, security, and cost across a large self-hosted runner fleet in European datacentres.

You will scale and run Actions Runner Controller with runner scale sets, episodic pods, and image caches. A strong Linux, IaC, and observability background is essential to reduce queue wait and improve build efficiency.