Senior DevOps Engineer - Mainloop

About the role

Mainloop is a new engineering team inside an established international group, based in Barcelona and being built from scratch this year. As the first (and for a while the only) DevOps engineer, you will build the entire delivery platform from the first commit, with direct reporting to the team lead and no on-call duty. The role is on-site in Barcelona.

Key responsibilities

• Build the platform from code: hosts, networking, ingress, access and environments, reproducible from a committed repository.
• Make deployment self-serve, removing the need for admin rights and undocumented steps.
• Set up a real machine secrets manager and broker credentials so agents never hold production keys.
• Run restore drills, write the report and prove that backups work.
• Build the release path: automated test gates, per-branch preview URLs and a rehearsed rollback.
• Keep the platform running with observability, cost caps and dependency hygiene.
• Decide the platform approach, including whether to use Kubernetes, and shape the team's standards.

Required profile

• Has built infrastructure from nothing and kept it running once others started using it.
• Has owned backups and actually restored from them under pressure.
• Comfortable running things on your own servers, not only on a managed cloud console.
• Has run Kubernetes in production and can judge when it is not the right answer.
• Writes things down, automates yourself out of the loop and can say no to unnecessary complexity.
• Fluent English; Spanish is useful, Catalan is not required.

Required skills

• Infrastructure as code
• Kubernetes in production
• Backups and restoration
• Secrets management and security basics

What we offer

• No on-call duty, ever.
• Healthcare with no premium, deductible or network from day one.
• Thirty calendar days of holiday plus fourteen public holidays.
• Relocation support: flights, first month's accommodation, visa and paperwork costs handled by an agent, and a relocation bonus paid on arrival (repayable only if leaving within 18 months).
• An on-site certificate after two to three years for engineers who master the team's architecture and agentic build method.