Frontend Senior Software Engineer

Mozilla Corporation; Deutschland; Remote; EUR 70.000 - 90.000; Vollzeit

Zusammenfassung

A leading tech organization is seeking an experienced developer to design and develop UI components for the Firefox Profiler. The role requires over 5 years of experience in JavaScript, React, and performance tooling. You will build user interfaces that visualize complex performance data and support engineers in utilizing these tools effectively. The position offers a remote work option with competitive benefits.

Leistungen

Generous performance-based bonus plans

Rich medical, dental, and vision coverage

Generous retirement contributions

Quarterly wellness days

Annual professional development budget

Considerable paid parental leave

Qualifikationen

• 5+ years of experience in JavaScript/TypeScript and UI development.
• Strong experience with building complex, interactive UIs that manage large datasets.
• Knowledge of profiling and performance tools.

Aufgaben

• Design and develop modern UI components for the Firefox Profiler.
• Build high-performance, scalable, user interfaces.
• Engage with Firefox engineers to improve tool usage.

Kenntnisse

JavaScript/TypeScript

React

Redux

Performance tooling knowledge

UI development

Tools

Jest

React Testing Library

Firefox Profiler

Chrome DevTools

Jobbeschreibung

Overview

Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms.

About this team and role:

The Performance Tools team builds frameworks and tools that help engineers measure and improve performance across Mozilla products. We’re a distributed team based in North America and Europe, supporting both internal Mozilla engineers and the broader web developer community through tools like the Firefox Profiler.

What you’ll do:

• Design and develop modern, interactive UI components for the Firefox Profiler using TypeScript, React, Redux, and related web technologies.
• Build high-performance, scalable, accessible, and maintainable user interfaces that visualize complex performance data.
• Engage with other Firefox engineers to help them learn how to use our tools efficiently, and develop projects to serve them better.
• Engage with the performance team efforts such as bug triage and strategy.
• Promote and encourage the use of our performance tools within and beyond Mozilla by writing and talking about them.
• Engage with our community and mentor volunteers contributing to the codebase.

What you’ll bring

• 5+ years of experience in JavaScript/TypeScript, React, Redux, and browser-based UI development.
• A strong background in building complex, interactive UIs that manage large data sets efficiently.
• Knowledge of profiling, performance tooling, and testing.
• Knowledge of frontend testing frameworks (e.g., Jest, React Testing Library) and best practices in maintainable UI codebases.
• Strong and respectful communication skills and ability to collaborate across engineering teams.
• Experience working with performance visualization is a plus.
• Familiarity with the Firefox Profiler or Chrome DevTools is a plus.

Commitment to our values

• Welcoming differences
• Being relationship-minded
• Practicing responsible participation
• Having grit

What you’ll get

• Generous performance-based bonus plans to all eligible employees - we share in our success as one team
• 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)

About Mozilla

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. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere and help create more opportunity and innovation for everyone online.

Commitment to diversity, equity, inclusion, and belonging

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. 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. Please contact us at [e-mail] to request 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.

Group: D

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Req ID: R2934