MozillaHiring

Staff Site Reliability Engineer, Tools & Systems

  • Remote, Spain
  • Senior
  • Posted 7 days ago
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In one line

Senior engineering role on the tools and systems that keep a large browser engineering org running, mixing software development with cloud operations and open-source work.

About the role

Suits a versatile engineer who can move between projects and take ownership of hard operational problems. The work covers internal engineering systems, developer tooling and the infrastructure behind them, done in the open.

At a glance

Pay
Not stated in the posting
Remote scope
Remote, Spain
Seniority
Senior
Skills
Python, JavaScript, TypeScript, Rust, Terraform, CI/CD, Containers
Posted
22 Oct 2026
Last checked
29 Oct 2026

What you will do

  • Build, ship and run the software and systems that browser engineering depends on.
  • Work on developer tooling, CI/CD pipelines, workflow automation and AI-assisted development tools.
  • Take complex problems from start to finish across code, cloud and operations, improving reliability, speed, observability and cost.
  • Team up with engineering, cloud, IT and other groups on issues that cross team lines.

What they look for

  • Solid software engineering skills plus real hands-on experience running production systems.
  • Strong coding in Python or JavaScript/TypeScript; C++ or Rust is a plus.
  • Experience deploying and operating cloud systems, including infrastructure as code such as Terraform.
  • Background across areas like CI/CD, containers and orchestration.

Nice to have

  • Contributing back to the wider open-source ecosystem.

How Keywordise applies for you

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ClaudeConnectorChatGPTConnectorMuseby Meta

Claude

  1. In Claude, open Settings, then Connectors, and choose Add custom connector.
  2. Name it Keywordise and paste the connector URL.
  3. Click Connect, log in to Keywordise and approve. Then send the prompt in a new chat.
Connector URL
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ChatGPT

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Connector URL
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Muse

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  3. Send the prompt. Muse asks before it sends anything.
Message for Muse
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Muse is available in the US only for now.

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How to connect

Questions about this job

Is this a remote job, and where can I work from?

Yes. The posting lists Staff Site Reliability Engineer, Tools & Systems as a remote role for candidates in Spain.

What does this job pay?

No pay range is stated in the posting.

What experience is needed?

It is a senior role. The posting asks for: solid software engineering skills plus real hands-on experience running production systems; strong coding in Python or JavaScript/TypeScript; C++ or Rust is a plus; experience deploying and operating cloud systems, including infrastructure as code such as Terraform. Skills it names include Python, JavaScript, TypeScript, Rust.

How do I apply with Keywordise AI?

Press the Apply with Keywordise AI button and add your CV. Keywordise tailors your CV and cover letter to this posting and sends the application for you, with a free 7-day trial and no card.

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