Senior Frontend Software Engineer, Mozilla
£65-95k
Offers generous performance-based bonus plans to all eligible employees
Designs, builds, and distributes internet software
Be an early applicant
Designs, builds, and distributes internet software
1001+ employees
Be an early applicant
£65-95k
Offers generous performance-based bonus plans to all eligible employees
1001+ employees
Company mission
To make sure that the internet remains accessible, open, and transparent to everyone.
Role
Who you are
- 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 the job involves
- 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
- In this role, you will work on the user interface of the Firefox Profiler
- This includes implementing interactive performance visualizations, handling large-scale performance data efficiently in the browser, and improving usability for engineers across Mozilla
- You will collaborate with systems engineers, browser developers, and other teams working on performance
- 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
Our take
Mozilla creates and manages a range of free-to-use software products. Their most well-known product is Firefox, the fourth most popular internet browser in the world. Mozilla is a not-for-profit with a focus on promoting online privacy. The company has a published manifesto outlining its commitment to keeping a balance between commercial profit and public benefit.
The companies other products include Bugzilla, a bug management platform, and Pocket, an award-winning digital content filing service. In direct odds with Google, Mozilla has recently launched a new product Mozilla VPN. The VPN or virtual private network enables users to browse the internet without being tracked. Companies such as Google rely on tracking user behavior online to target them with advertising.
Mozilla was also instrumental in creating the programming language Rust, which is admired for its brevity. Rust uses roughly half the amount of code as C++ to produce the same results.
Freddie
Company Specialist at Welcome to the Jungle
Insights
12% employee growth in 12 months
Company
Funding (last 2 of 3 rounds)
Apr 2018
$1.2m
GRANT
Jan 2005
$0.3m
ANGEL
Total funding: $3.5m
Company benefits
- Health, Dental, and Vision Insurance
- Life Insurance + Accidental Death & Dismemberment
- Short-Term Disability and Long-Term Disability Insurance
- Employee Assistance Program (EAP)
- Retirement Plan contributions
- 20 Paid Time Off days per year (prorated) + your birthday
- Company Holidays + Shutdown
- Wellness budget
- Reimbursement for professional development (up to $3,000/year)
- Industry-leading paid parental leave (up to 26 weeks of fully paid leave for childbearing parents and up to 12 weeks for non-childbearing parents)
- Flexible work environment (nearly half of Mozillians work remotely)
- A work setup including the latest hardware and software of your choice
Company HQ
Rincon Hill, San Francisco, CA
Leadership
Mitchell Baker
(CEO & Chairwoman)Mitchell worked as a lawyer and at Netscape Communications before co-founding Mozilla in 2003. They have served as Chairwoman of Mozilla Foundation since then, and CEO as of April 2020.
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