Mozilla
Mozilla1d ago
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Firefox Software Test Engineering Student Worker

GermanyGermanyRemotemid
OtherSoftware
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Quick Summary

Overview

The Opportunity The Firefox team is a community of engineers who care deeply about delivering the fastest, friendliest, and most usable browser possible. We are responsible for making the things you see in the browser work securely, quickly, and well!

Requirements Summary

Enjoy working with a geographically dispersed team, people from different time zones, cultures and backgrounds. Know how to identify a problem, come up with a logical solution, and use the knowledge to tackle similar problems in future.

Technical Tools
pytestpythonseleniumci-cdcode-review

The Firefox team is a community of engineers who care deeply about delivering the fastest, friendliest, and most usable browser possible. We are responsible for making the things you see in the browser work securely, quickly, and well!

Our team is geographically distributed and responsible for validating all critical browser areas, both core and new, through dedicated processes for build validation, new feature testing, regression testing, end-to-end testing, and bug work. Our focus is on being the voice of our users and helping to fix things in Firefox as well as assisting other teams in making it the most user-friendly browser on the market. We are currently working on building a system to automate the majority of our smoke tests and implementing a monitoring system.

Do you enjoy delighting people with solutions to their problems? Do you like to collaborate with engineers and learn from others? Are you interested in learning how to write performant, secure code and deliver it to hundreds of millions of people? If so, we’d love to hear from you.

Responsibilities

~1 min read
  • Work on one of the world’s largest and most important open source codebases - the Firefox Desktop Browser.
  • Work with a world-class engineering organization solving internet problems. 
  • Your work will positively affect hundreds of millions of folks worldwide.
  • Collaborate with other engineers to set up automation framework and write scripts
    • Create Page Object Models and support scripts for automated testing
    • Write automated tests, do code reviews of Page Object Models, support scripts, and automated tests.
    • Support CI efforts with Taskcluster.
    • Assist in the creation/maintenance of a test monitoring system.
    • Assist your team by investigating and resolving technical challenges.
    • Contribute to QA Automation best practices.

Enjoy working with a geographically dispersed team, people from different time zones, cultures and backgrounds.Know how to identify a problem, come up with a logical solution, and use the knowledge to tackle similar problems in future.

  • Proactively identify opportunities to assist with tasks and challenges to enhance team collaboration.
  • Detail-oriented with a passion for quality and testing.
  • Ability to learn quickly and adapt to new technologies and methodologies.
  • Speak English fluently and enjoy conducting software engineering work in the open.

You will help us to improve the user experience of Firefox and the web in general. We offer flexible working hours and competitive compensation depending on the number of hours. You will be able to participate in our office life, including catered lunches and various social activities.

Requirements

~1 min read
  • Experience with Python programming language.
  • Familiarity with Selenium or similar WebDriver for test automation.
  • Basic understanding of Continuous Integration and Continuous Deployment (CI/CD) practices.

Nice to Have

~1 min read
  • Familiarity with PyTest testing library.
  • In-depth understanding of Continuous Integration and Continuous Deployment (CI/CD) practices.
  • Basic or above knowledge of AI tools 
  • Familiarity with Taskcluster or similar CI services
  • Unafraid of asking questions, and proposing new ideas if you think they will make a positive impact.
  • A love of helping your colleagues grow and get better at what they do.

We value a variety of voices within our team and at Mozilla. You don't need to check every box on this list to apply.

Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online.

Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions.

We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at recruiting@mozilla.com to request an accommodation.

We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose.

Location & Eligibility

Where is the job
Germany
Remote within one country
Who can apply
Open to applicants worldwide

Listing Details

Posted
May 6, 2026
First seen
May 6, 2026
Last seen
May 8, 2026

Posting Health

Days active
0
Repost count
0
Trust Level
76%
Scored at
May 6, 2026

Signal breakdown

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Mozilla
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A lot of companies say they’re “mission-driven. ” Our unique corporate structure guarantees that every decision we make upholds our mission: to ensure the internet remains open and accessible.

Employees
3k+
Founded
2005
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MozillaFirefox Software Test Engineering Student Worker