Senior Data Scientist, Product

Mozilla

Senior Data Scientist leading analytical support for user growth in Firefox web browser. Collaborating with product and engineering to influence decision-making through data-driven insights.

Posted 4/16/2026full-timeRemote • 🇺🇸 United StatesSeniorWebsite

Tech Stack

Tools & technologies

PythonSQL

About the role

Key responsibilities & impact

Own the analytical success for a feature area by defining north-star metrics, building datasets, establishing measurement strategies, and driving data-driven decisions
Provide deep-dive and root-cause analyses to guide feature development, such as understanding what’s driving a metric change or opportunity sizing of new features
Design and analyze experiments to understand feature impact, user behavior, and causal relationships
Design measurement plans to evaluate new growth initiatives and validate assumptions over time
Contribute to the team's statistical forecasting models and help translate model outputs into actionable growth plans
Sit at the intersection between product, engineering, and leadership to advise, influence, support, and implement our product decisions
Cultivate a culture of measurement and advocate for strong analytical standards and methodologies across the organization

Requirements

What you’ll need

6+ years of experience in data science, analytics, or applied quantitative analysis, with a track record of influencing business decisions through data
Advanced proficiency in SQL and Python for analysis, modeling, and validation
Background in experimentation (A/B testing) and causal inference for product development
Familiarity with time-series forecasting or statistical modeling techniques
Experience communicating models and findings to senior leadership and cross-functional partners
Ability to operate effectively in fast-paced environments with multiple viable options, delivering directional insights with clear rationale
Commitment to our values:
Welcoming differences
Being relationship-minded
Practicing responsible participation
Having grit

Benefits

Comp & perks

Generous performance-based bonus plans to all eligible employees - we share in our success as one team
Rich medical, dental, and vision coverage
Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
Quarterly all-company wellness days where everyone takes a pause together
Country specific holidays plus a day off for your birthday
One-time home office stipend
Annual professional development budget
Quarterly well-being stipend
Considerable paid parental leave
Employee referral bonus program
Other benefits (life/AD&D, disability, EAP, etc.varies by country

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Hard Skills & Tools

data scienceanalyticsapplied quantitative analysisSQLPythonA/B testingcausal inferencetime-series forecastingstatistical modelingstatistical forecasting

Soft Skills

influencing business decisionscommunicationoperating effectively in fast-paced environmentsdelivering directional insightsadvocating for analytical standardscollaborationrelationship-mindedgrit