Remote
United Kingdom (Remote)
💻Engineering
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MZLA Technologies Corporation (MZLA) is a wholly owned, for-profit subsidiary of the Mozilla Foundation and home to Thunderbird, 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.
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 privacy and productivity should coexist, and that people deserve powerful digital tools without surrendering control of their data.
MZLA is a small but growing team of 50+ people distributed across seven countries. 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 independent of big tech ecosystems. 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.
To learn more, visit www.thunderbird.net
The Staff Software Engineer, Mobile is a senior individual contributor who brings deep iOS expertise to the design, development, and evolution of Thunderbird’s iOS application. This role works on complex and ambiguous technical problems, leads significant mobile initiatives, and contributes to architectural decisions in collaboration with other senior engineers and engineering leadership.
You’ll work closely with mobile engineers, product management, UX, and other partners to deliver high-quality iOS experiences that meet high standards for performance, reliability, accessibility, security, and maintainability. The ideal candidate demonstrates deep mobile expertise, collaboration with engineering leadership and peers, ownership of technical decisions, and the ability to influence, mentor, and guide the work of other engineers.
You’ll play a critical role in delivering exceptional user experiences by translating strategy into action and ensuring technical decisions align with MZLA’s mission and the objectives of the Thunderbird Project. This is a full-time, remote position working with colleagues across multiple regions and time zones.
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.
This is a remote position. Strong communication and documentation skills are essential for effective collaboration across time zones and disciplines.
We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are:
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.
In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self.
Applicants must reside in and have permanent work authorization 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.
Please apply directly through our career page. 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 your 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.
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.
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.
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 hiringaccommodations@thunderbird.net to request accommodation.
Health Insurance
Dental Insurance
Vision Insurance
Mental Health Benefits
Disability Insurance
Life Insurance
Health Savings Account (HSA)
Flexible Spending Account (FSA)
Employee Assistance Program
Fitness Stipend
Wellness Programs
401(k) / Retirement Plan
Performance Bonus
Relocation Assistance
PTO / Vacation
Sick Days
Paid Holidays
Company Shutdown Days
Bereavement Leave
Learning & Development Budget
Parental Leave (Primary)
Parental Leave (Secondary)
Home Office Stipend
Internet Stipend
Coworking Allowance
Employee Referral Bonus
