Staff Engineer, Mozilla
Front End, Desktop
£72-86k
+ Discretionary Annual Bonus Program
More information about location
Internet software for people, not profit
Be an early applicant
Internet software for people, not profit
1001+ employees
Be an early applicant
£72-86k
+ Discretionary Annual Bonus Program
More information about location
1001+ employees
Company mission
To ensure the internet remains open and accessible.
Role
Who you are
- The ideal candidate has a strong focus on front-end architecture, user experience, and performance, and demonstrates technical leadership, sound judgment, and a collaborative approach to problem solving
- 10+ years of experience in front-end software development, building scalable, maintainable, and user-focused systems
- Extensive knowledge of modern vanilla JavaScript concepts (module patterns, async and promises, custom elements and shadow DOM), and up to date knowledge with the most recent ECMAScript specification
- Strong command of modern JavaScript frameworks such as React, Vue, or similar, and experience transitioning legacy codebases to new technologies
- Deep knowledge of HTML5 structures and advanced accessibility patterns and Deep knowledge of modern CSS patterns and methods
- In-depth understanding of system architecture, design patterns, and software engineering best practices, with a focus on performance, scalability, and maintainability
- Proven ability to act as a technical lead and mentor, providing guidance on complex technical problems and supporting the growth of other engineers
- Experience developing and testing applications across multiple platforms (Windows, macOS, and Linux), with expertise in Git or Mercurial and modern version control workflows
- Excellent communication and documentation skills, a collaborative approach to cross-functional work,
- A strong commitment to continuous learning and improvement
Desirable
- Experience contributing to or leading open-source projects
- Experience with Python or other programming languages
- Ability to engage with and support a global community of developers, including managing feedback and fostering an inclusive and productive ecosystem
- Proficiency in French, German, Japanese, or another language in addition to English
What the job involves
- As a Staff Software Engineer, Front-End, you’ll serve as a domain expert who deeply understands the complexities of shaping seamless, user-focused interfaces and delivering high-quality front-end solutions that align with product strategy
- You’ll join a team of talented front- and back-end engineers who bring deep expertise to the development and maintenance of our flagship desktop application, cherished by millions of users worldwide for over 20 years
- You’ll work closely with engineers and cross-functional partners to tackle ambiguous problems in user experience, performance optimization, and architectural design
- You’ll play a vital part in translating strategy into action by influencing technical direction, mentoring engineers at multiple levels, and ensuring that technical decisions align with MZLA’s mission and the objectives of the Thunderbird Project, particularly in delivering exceptional user experiences
- Lead complex, ambiguous technical initiatives requiring cross-team and cross-organization coordination
- Own and deliver projects spanning new features, code quality improvements, tooling, and process optimization
- Partner with senior engineers and product managers to define and execute technical strategy, reduce technical debt, and improve long-term maintainability
- Collaborate closely with UX Engineers to ensure accessibility and usability are built in from the start (WCAG, ARIA)
- Establish and promote scalable front-end architecture through shared frameworks and guidelines
- Write high-quality, testable, and maintainable code; contribute to code reviews, testing, regression triage, and patch integration
- Mentor and support engineers across the team, fostering a culture of learning and continuous improvement
Our take
Mozilla develops a range of free and open-source software, with its most familiar product being Firefox. Operated with a mission-driven, not0for-profit ethos, Mozilla champions online privacy, open standards and user-choice.
Beyond Firefox, Mozilla has focused on privacy forward offerings such as Mozilla VPN, which allows users to browse securely without being tracked. The company has also streamlined its product portfolio to concentrate on initiatives that align closely with its core mission, ensuring resources are dedicated to improving user experiences while fostering safer, more open digital environments.
Alongside this, its impact extends into the developer and tech community, having played a pivotal role in the creation of Rust, a systems programming language celebrated for its speed and efficiency. With a loyal user base, ongoing innovation, and a clear commitment to privacy and open-source principles, Mozilla remains an influential player in the technology landscape.
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 and wellness: Mozilla covers medical, dental and vision plan premiums at 100% for U.S. and Canadian employees. Our offerings give you the options you need to manage your health — and your family’s — the way you want.
- Mental health: Mental health is as important as our physical health. That’s why Mozilla’s health benefits include therapy and coaching sessions to make sure our people have access to the care they need.
- Time away: With all of life’s demands, time away from work to disconnect and recharge is essential. In addition to country-specific holidays (12 in the U.S. and Canada), vacation and sick time start accruing right away (specifics vary by country). Everyone also takes a pause together on quarterly all-company wellness days, plus you get to celebrate the most personal holiday of all: your birthday.
- Parental leave: While Mozilla’s parental leave policies vary globally, our U.S. and Canadian-based employees can look forward to 26 weeks of paid leave for childbearing parents and 12 weeks of paid leave for non-childbearing parents.
- Financial: Mozilla is a private company, so our compensation isn’t tied to stock options or equity plans. Instead, we offer generous, performance-based bonus plans to all regular employees to underscore that we share in our success as one team. As for retirement savings for US and Canadian employees, Mozilla contributes a percentage of your eligible base salary each year to the 401(k) Plan/RRSP (regardless of whether you contribute or not), with 100% vesting.
- Learning and development: We’re big believers in learning by doing, and we also want to invest in your education and development beyond your role. Every employee is eligible for an annual professional development budget. Mozillians can put it toward technical or management training, certifications, conferences and more.
- Help when you need it: Life is full of surprises; that’s why it’s important to be prepared. Mozilla provides Life/AD&D and Short and Long Term Disability insurance (offerings may vary by locale) to ensure that you and your family will have a safety net in place should you ever need it.
- Plus a bit more: A few other benefits include a quarterly wellbeing stipend (to use on those things just for you), an employee referral bonus, internet reimbursement if you’re remote, and a budget for office essentials to make working remotely ergonomically comfortable.
Company HQ
Rincon Hill, San Francisco, CA
Leadership
Laura Chambers
(CEO)Alongside serving as the CEO at Mozilla, Laura is an Executive Fellow at Harvard Business School. Previously, she was the CEO and PResident at Willow Innovation, Director at Patelco Credit Union, and General Manager of Core Hosts & Community at Airbnb.
Share this job
View 43 more jobs at Mozilla