Staff Data Scientist, Firefox

Mozilla is a non-profit-backed technology company dedicated to keeping the internet open and accessible. As a Staff Data Scientist for Firefox, you will play a pivotal role in shaping the future of our flagship browser by driving data-informed product strategy and growth.

Key responsibilities

• Own the analytical strategy for a major product area, identifying high-leverage questions and defining measurement frameworks.
• Partner with product and engineering leadership to translate complex business problems into actionable recommendations.
• Design and oversee experiments and causal analyses to ensure rigorous decision-making.
• Develop and maintain a deep understanding of user growth dynamics, including acquisition, activation, and retention.
• Mentor other data scientists and establish team-wide analytical standards and reusable frameworks.

Requirements

• 8+ years of experience in data science, analytics, or applied quantitative analysis.
• Demonstrated ability to lead complex, cross-functional initiatives from problem framing to execution.
• Deep expertise in experimentation, A/B testing, and causal inference.
• Advanced proficiency in SQL and Python for analysis, modeling, and validation.
• Strong communication skills with the ability to advocate for data-driven positions in cross-functional forums.

What we offer

• Generous performance-based bonus plans and retirement contributions.
• Comprehensive medical, dental, and vision coverage.
• Annual professional development budget and quarterly well-being stipends.
• Flexible time off, including wellness days and a birthday holiday.
• One-time home office stipend to support your remote work environment.