SR Staff Mixed Methods User Researcher

About the Role: Mozilla Corporation, the non-profit-backed technology company behind Firefox, is looking for a Senior Staff Mixed Methods User Researcher. You will champion human-centered exploration of complex problems, using evidence, data, and insight to drive decision-making. You will lead both evaluative and foundational studies, translating findings into actionable insights that shape product and design strategy.

What You'll Do

• Lead the most complex, ambiguous, and high-stakes research studies to directly shape product vision at the organizational level.
• Drive user-centered decision-making at the executive level, influencing directors and VPs.
• Partner cross-functionally with product, design, engineering, and data science to identify high-impact research opportunities.
• Integrate diverse data sources (qualitative, quantitative, behavioral) to build evidence-based perspectives on user experience.
• Leverage AI tools thoughtfully across the research workflow and define standards for responsible AI use in research.
• Elevate the research practice by setting methodological bars and mentoring researchers across the team.

What You Bring

• 8+ years of applied research work experience, including strategic research leadership, with at least 6 years in the tech/SaaS industry.
• Deep expertise in qualitative methods (e.g., interviews, concept testing, usability studies) and quantitative approaches (e.g., survey design, data analysis).
• Extensive experience leading both evaluative and generative research across the product development lifecycle.
• Exceptional judgment in setting research priorities and making trade-offs across multiple concurrent workstreams.
• Deep, current knowledge of AI tools used in research workflows and the ability to evaluate outputs critically.
• A collaborative communication style skilled at building cross-functional partnerships.

Benefits

• Generous performance-based bonus plans.
• Rich medical, dental, and vision coverage.
• Generous retirement contributions with 100% immediate vesting.
• Quarterly all-company wellness days and well-being stipends.
• One-time home office stipend and an annual professional development budget.
• Considerable paid parental leave and flexible holiday schedules.