Mozilla · 7 hours ago
Staff Engineer, Front End (Desktop)
United States
Full-time
Remote
Lead/Staff
$150K/yr - $175K/yr
10+ years expMZLA Technologies Corporation, a subsidiary of the Mozilla Foundation, is seeking a Staff Software Engineer, Front-End to enhance their open-source email and productivity platform, Thunderbird. The role involves leading technical initiatives, collaborating with cross-functional teams, and mentoring engineers to deliver high-quality user-focused interfaces and solutions.
Telecom & CommunicationsSoftwareBrowser ExtensionsInternetOpen SourceWeb Browsers
No H1B
Responsibilities
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
Qualification
Required
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
Preferred
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
Benefits
Fully remote work & schedule flexibility
Latest Laptop
Discretionary Annual Bonus Program
Monthly Remote Work Stipend
Annual Professional Development Stipend
Access to Udemy Learning Platform
Industry Conferences
Company All Hands
24 days PTO per year (prorated)
Your Birthday
Year-end Company Shutdown
9 Wellbeing Days
Public Holidays
Other Paid Leave
Quarterly Wellbeing Stipend for Personal / Family Activities
401(k) Contributions
Health, Dental, & Vision Insurance
Disability Insurance
Life Insurance
Employee Assistance Program
Paid Parental Leave
Paid Sick Days
Company
Mozilla
Mozilla provides internet solutions and offers firefox, thunderbird, and raindrop.
501-1000 employees
Funding
Current Stage
Late StageTotal Funding
$2.3MKey Investors
AOL
2005-01-01Angel· $0.3M
2003-07-15Series Unknown· $2M
Leadership Team
John Shaughnessy
Manager, Engineering and Ecosystem Strategy
Recent News
2026-02-09
Help Net Security
2026-02-08
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