Staff Software Engineer, Tools & Systems
Level inferred from job title
Job description
An experienced, versatile software engineer to work on the tools and systems that support Firefox engineering, spanning internal engineering systems, developer tooling, workflow automation, and the infrastructure to operate them.
At a glance
- Employment
- Full-time · Employee (employment agreement)
- Work mode
- Remote · Spain
- Pay
- EUR 76,000 – 101,000 / year
What you'll do
- Design, build, deploy, and operate software and systems supporting Firefox engineering.
- Contribute to developer tooling, CI/CD, workflow automation, and AI-assisted development tools.
- Own complex technical problems end-to-end across software, cloud, and operational layers, improving reliability, performance, observability, and cost efficiency.
- Work with Firefox engineering, Cloud Engineering, IT, and other teams to solve problems that span technical and organizational boundaries.
- Use telemetry, metrics, and data analysis to investigate problems and guide engineering decisions.
- Contribute to architecture and technical strategy, identifying recurring problems and solutions that can be applied across teams.
What we're looking for
- Strong software engineering skills and substantial hands-on experience deploying and operating production systems.
- Strong programming skills in languages such as Python or JavaScript/TypeScript.
- Experience building, deploying and operating production systems in cloud environments, including utilizing infrastructure as code such as Terraform.
- Experience across several areas such as CI/CD, containers and orchestration, networking, databases, observability, or developer tooling.
- Experience using data, telemetry, and metrics to investigate technical problems and make decisions.
- Familiarity with modern AI-assisted development tools and an understanding of their capabilities, limitations, and appropriate use.
- Comfortable jumping into unfamiliar systems and getting them into a sustainable state.
- Enjoys moving across projects and technical domains, taking ownership of problems and looking for patterns.
- Works effectively across disciplines and can translate between software, infrastructure, and operational concerns.
- Combines hands-on engineering with systems thinking and longer-term technical judgment.
- Communicates openly, consistently, and respectfully, and enjoys teaching and helping others build skills.
Nice to have
- Experience with C++ or Rust is useful.
Your team
Firefox engineering
The role supports Firefox engineering, working with Firefox engineering, Cloud Engineering, IT, and other teams.
Benefits
- Generous performance-based bonus plans to all eligible employees
- Rich medical, dental, and vision coverage
- Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
- Quarterly all-company wellness days where everyone takes a pause together
- Country specific holidays plus a day off for your birthday
- One-time home office stipend
- Annual professional development budget
- Quarterly well-being stipend
- Considerable paid parental leave
- Employee referral bonus program
- Other benefits (life/AD&D, disability, EAP, etc. - varies by country)
Apply
Direct apply at Mozilla
Opens the job posting at Mozilla
About Mozilla
The non-profit-backed technology company that has shaped the internet for the better over the last 25 years.
Mozilla Corporation is the non-profit-backed technology company behind brands like Firefox, the privacy-minded web browser. With more than 225 million people around the world using its products each month, Mozilla focuses on diverse areas including AI, social media, security and more. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation.
Mission
To make the internet better for people; to build the Internet as a public resource accessible to all because open and free is better than closed and controlled.
Key facts
- Technology
- More than 225 million people around the world use Mozilla products each month
- The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation
- We build in the open and contribute back to the broader open-source ecosystem
What they value
- Open and free is better than closed and controlled
- Diversity, equity, inclusion, and belonging
- Communicate openly, consistently, and respectfully