Staff Engineer - Front End (Desktop) at Mozilla. Location Information: USA,Canada,UK. <p><strong>MZLA Technologies Corporation (MZLA)</strong><span style="font-weight: 400;"> is a wholly owned, for-profit subsidiary of the Mozilla Foundation and home to </span><strong>Thunderbird</strong><span style="font-weight: 400;">, our flagship open-source email and productivity platform empowering more than 20 million people around the world. While part of the Mozilla portfolio of companies, MZLA operates independently in both identity and organizational structure from the Mozilla Foundation and Mozilla Corporation.</span></p> <p><span style="font-weight: 400;">Everything we build at MZLA is open source, developed transparently and in collaboration with a global community of contributors. This open approach shapes not only our products but also how we work: collaboratively, inclusively, and with a shared commitment to building technology that puts users first. We believe </span><strong>privacy and productivity should coexist</strong><span style="font-weight: 400;">, and that people deserve powerful digital tools without surrendering control of their data.</span></p> <p><span style="font-weight: 400;">MZLA is a small but growing team of </span><strong>50+ people distributed across seven countries</strong><span style="font-weight: 400;">. As we evolve Thunderbird from a single application into a suite of privacy-respecting productivity tools, we’re introducing new products and services that remain </span><strong>independent of big tech ecosystems</strong><span style="font-weight: 400;">. Our unique revenue model combines community donations that keep Thunderbird freely available with subscriptions for new cloud-based services, allowing us to grow and innovate while remaining independent and true to our values.</span></p> <p><span style="font-weight: 400;">To learn more, visit </span><a href="http://www.thunderbird.net"><span style="font-weight: 400;">www.thunderbird.net</span></a></p> <p><strong>The Opportunity:</strong></p> <p><span style="font-weight: 400;">As a </span><strong>Staff Software Engineer, Front-End</strong><span style="font-weight: 400;">, 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.</span></p> <p><span style="font-weight: 400;">You’ll work closely with engineers and cross-functional partners to tackle ambiguous problems in user experience, performance optimization, and architectural design. 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.</span></p> <p><span style="font-weight: 400;">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. </span></p> <p><span style="font-weight: 400;">This is a full-time, remote position working with colleagues across multiple regions and time zones.</span></p> <p><strong>What you’ll do: </strong></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">Lead complex, ambiguous technical initiatives requiring cross-team and cross-organization coordination</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Own and deliver projects spanning new features, code quality improvements, tooling, and process optimization</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Partner with senior engineers and product managers to define and execute technical strategy, reduce technical debt, and improve long-term maintainability</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Collaborate closely with UX Engineers to ensure accessibility and usability are built in from the start (WCAG, ARIA)</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Establish and promote scalable front-end architecture through shared frameworks and guidelines</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Write high-quality, testable, and maintainable code; contribute to code reviews, testing, regression triage, and patch integration</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Mentor and support engineers across the team, fostering a culture of learning and continuous improvement</span></li> </ul> <p><strong>What you’ll bring: </strong></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">10+ years of experience in front-end software development, building scalable, maintainable, and user-focused systems.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">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.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Strong command of modern JavaScript frameworks such as React, Vue, or similar, and experience transitioning legacy codebases to new technologies.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Deep knowledge of HTML5 structures and advanced accessibility patterns and Deep knowledge of modern CSS patterns and methods.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">In-depth understanding of system architecture, design patterns, and software engineering best practices, with a focus on performance, scalability, and maintainability.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Proven ability to act as a technical lead and mentor, providing guidance on complex technical problems and supporting the growth of other engineers.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Experience developing and testing applications across multiple platforms (Windows, macOS, and Linux), with expertise in Git or Mercurial and modern version control workflows.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Excellent communication and documentation skills, a collaborative approach to cross-functional work, </span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">A strong commitment to continuous learning and improvement.</span></li> </ul> <p><strong>Bonus points for:</strong></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">Experience contributing to or leading open-source projects</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Experience with Python or other programming languages</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Ability to engage with and support a global community of developers, including managing feedback and fostering an inclusive and productive ecosystem</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Proficiency in French, German, Japanese, or another language in addition to English</span></li> </ul> <p><strong>Work Environment:</strong></p> <p><span style="font-weight: 400;">You’ll work with our passionate staff and open-source community members from all over the globe to support the mission and objectives of MZLA Technologies Corporation. </span></p> <p><span style="font-weight: 400;">This is a remote position. Strong communication and documentation skills are essential for effective collaboration across time zones and disciplines.</span></p> <p><strong>What you’ll get:</strong></p> <p><span style="font-weight: 400;">We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are:</span></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">US: $150,000 - $175,000 USD </span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Canada: $125,000 - $145,000 CAD </span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">UK: £72,000 - £86,000 GBP </span></li> </ul> <p><span style="font-weight: 400;">We may consider candidates with strong skills but less than the required experience. Title, level and compensation will be determined based on qualifications and experience.</span></p> <p><span style="font-weight: 400;">In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self, outlined below. </span></p> <p><strong>Work & Career</strong></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">Fully remote work & schedule flexibility</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Latest Laptop </span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Discretionary Annual Bonus Program</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Monthly Remote Work Stipend</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Annual Professional Development Stipend</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Access to Udemy </span><span style="font-weight: 400;">Learning Platform</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Industry Conferences</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Company All Hands</span></li> </ul> <p><strong>Rest & Play</strong></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">24 days PTO per year (prorated) </span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Your Birthday</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Year-end Company Shutdown</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">9 Wellbeing Days</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Public Holidays</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Other Paid Leave</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Quarterly Wellbeing Stipend for Personal / Family Activities</span></li> </ul> <p><strong>Health & Family</strong></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">401(k) / RRSP/</span><span style="font-weight: 400;"> Pension Contributions</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Health, Dental, & Vision Insurance</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Disability Insurance</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Life Insurance</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Employee Assistance Program </span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Paid Parental Leave</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Paid Sick Days </span></li> </ul> <p><strong>Work Eligibility:</strong></p> <p><span style="font-weight: 400;">Applicants must reside in and </span><strong>have permanent work authorization</strong><span style="font-weight: 400;"> for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship.</span></p> <p><strong>How to Apply:</strong></p> <p><span style="font-weight: 400;">Please apply directly through our </span><a href="https://www.mozilla.org/en-US/careers/listings/?team=MZLA/Thunderbird"><span style="font-weight: 400;">career page</span></a><span style="font-weight: 400;">. We carefully review every cover letter and screening question, so take the time to answer each fully. We also value authenticity. We want to hear </span><em><span style="font-weight: 400;">your</span></em><span style="font-weight: 400;"> perspective, not a bot’s. It's fine to use AI to polish your writing, but not to write your answers. Candidates who submit unoriginal AI generated answers will be disqualified from further screening. </span></p> <p><strong>MZLA Technologies Corporation (MZLA) Commitment to diversity, equity and inclusion</strong></p> <p><span style="font-weight: 400;">MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion 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 not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions.</span></p> <p><span style="font-weight: 400;">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. </span></p> <p><span style="font-weight: 400;">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</span><strong> </strong><strong>[email protected]</strong><span style="font-weight: 400;"> to request accommodation.</span></p> <p>#LI-DNI<br><br><br></p>
Staff Engineer - Front End (Desktop) at Mozilla