Staff Designer

at MZLA/Thunderbird Locations: : Remote US, Remote Canada, Remote UK

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• Remote US
• Remote Canada
• Remote UK

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 Staff Designer, you will operate at a system level, shaping clear, connected experiences across our desktop, web, and mobile products. You’ll partner closely with engineering and product leadership to define direction, establish shared frameworks, and lead complex initiatives from discovery through delivery. This role combines strategic influence with hands-on execution. You’ll identify system-wide opportunities, translate research and business context into scalable experience patterns, and drive cohesive, accessible design across platforms. You’ll also elevate design craft across the organization by mentoring others and setting a high standard for quality, clarity, and usability. This is a full-time, remote position working with colleagues across multiple regions and time zones. What you’ll do:

• Lead complex, cross-team design initiatives from problem framing and discovery through shipped outcomes.
• Map end-to-end user journeys to identify system-level gaps and define scalable experience solutions.
• Produce high-quality design artefacts, including flows, wireframes, prototypes, and documentation, that create alignment and enable confident implementation.
• Shape experience frameworks, visual systems, and design standards that scale across platforms and teams.
• Translate research, analytics, and business context into clear recommendations, actionable plans, and long-term experience strategy.
• Lead and guide user research and usability testing efforts,...