User Interface / Visual Designer

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 Opportunity:

As a User Interface / Visual Designer, you’ll help shape and refine the visual language of our desktop, web, and mobile platforms, creating cohesive, accessible, and visually compelling interfaces that express our brand and support intuitive interaction. You’ll join the Design team, which works across Thunderbird and MZLA to deliver high-quality, user-focused experiences.

You’ll work closely with design and front-end development teams to take projects from concept to delivery, translating requirements into layouts, design systems, components, and production-ready assets. You’ll thrive in this role by bringing strong visual craft, a commitment to accessibility and consistency, and a track record of accountability, follow-through, and thoughtful problem-solving, while comfortably driving work forward with support from teammates. .

You’ll play a vital part in delivering polished, intuitive experiences for our global user community and owning medium-sized projects. This is a full-time, remote position working with colleagues across multiple regions and time zones.

What you’ll do: 

• Create and refine high-fidelity layouts and UI components.
• Build interactive prototypes, starting from low-fidelity wireframes when needed.
• Deliver visually appealing, accessible interfaces aligned with user needs and brand guidelines.
• Translate designs into implementation-ready specifications and assets.
• Account for responsive behaviour, typography, colour contrast, spacing, and accessibility across platforms.
• Work within and contribute to design systems, component libraries, and style guides.
• Apply information hierarchy, layout, and interaction design to create clear, readable interfaces.
• Identify and articulate visual design issues, extract insights from feedback, and propose design solutions in collaboration with cross-functional partners.
• Support UX research activities by preparing visual assets, participating in studies and applying research findings to visual and interaction details.
• Engage with the open-source community to gather feedback and foster collaboration.
• Support ad hoc projects as required.

What you’ll bring: 

• 3+ years of professional experience in user interface / visual design or a closely related role, with increasing responsibility and a proven ability to scope and finish projects.
• A strong portfolio demonstrating high-fidelity layouts, UI components, and prototypes for web, desktop, and/or mobile products, with clear design rationale and impact.
• Experience working on multi-platform products and contributing to scalable design systems, component libraries, and style guides.
• Familiarity with accessibility standards (e.g. colour contrast, typography, motion) and applying them to create inclusive, usable interfaces.
• Bachelor’s degree or equivalent experience in design, visual communication, human–computer interaction, or a related field; additional coursework or training in UI, visual, or interaction design is a plus.
• Excellent written and verbal communication skills, with experience collaborating on a multi-disciplinary, geographically distributed team.
• A strong commitment to collaboration, openness, and respect for diverse perspectives; experience engaging with open-source or other community-driven feedback loops is a plus. 

Bonus points for:

• Ability to design clear, cohesive icons and icon sets that align with the product’s brand and system.
• Experience creating 2D illustrations (such as empty states and onboarding) to support the interface.
• Experience producing on-brand marketing assets for digital and print, including social graphics, newsletters, and campaign materials.
• Comfort writing or refining short in-product copy to keep interfaces clear and engaging.
• A passion for user research and evidence-based design choices. .
• Familiarity with Agile and Lean Startup methodologies.

Work Environment:

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, open to candidates in regions overlapping with teams in Canada, the US, and Europe. Strong communication and documentation skills are essential for effective collaboration across time zones and disciplines. 

What you’ll get:

We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are:

• US: $72,000 - 85,000 USD annually

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, outlined below. 

Work & Career

• 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

Rest & Play

• 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

Health & Family

• 401(k) Contributions
• Health, Dental, & Vision Insurance
• Disability Insurance
• Life Insurance
• Employee Assistance Program 
• Paid Parental Leave
• Paid Sick Days 

Work Eligibility:

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.

How to Apply:

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 Technologies Corporation (MZLA) Commitment to diversity, equity and inclusion

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 [email protected] to request accommodation.