Sr Staff Quantitative User Researcher

📍 Job Overview

Job Title: Sr Staff Quantitative User Researcher

Company: Mozilla

Location: Remote US

Job Type: Full-Time

Category: User Research / Data Science

Date Posted: March 17, 2026

Experience Level: 10+ Years

Remote Status: Fully Remote

🚀 Role Summary

• Lead strategic and tactical quantitative research initiatives to understand user experiences, needs, motivations, and behaviors at scale.

• Apply robust quantitative methods to inform product and design strategy within an agile, fast-paced environment.

• Partner cross-functionally with product, design, engineering, data science, and marketing to develop and own a research roadmap.

• Translate complex data sources, including surveys and behavioral data, into clear, actionable insights that influence product decisions and business priorities.

• Champion user-centered decision-making by embedding research into product strategy and advocating for user needs.

📝 Enhancement Note: This role is critical for driving data-informed product development at Mozilla, specifically within the Firefox ecosystem. The "Sr Staff" title indicates a senior-level individual contributor role with significant strategic influence and potential for mentorship. The emphasis on "quantitative" research, coupled with specific technical requirements like R and SQL, points to a need for strong analytical and statistical rigor.

📈 Primary Responsibilities

• Own the end-to-end execution of strategic quantitative research initiatives, from defining business needs and designing surveys to synthesizing data and communicating actionable recommendations.

• Utilize a diverse array of quantitative research methods to integrate insights throughout the product development lifecycle, including opportunity sizing, prioritization, concept testing, and post-launch tracking.

• Collaborate with product managers, designers, engineers, data scientists, and marketing teams to co-create and manage a research roadmap, identifying high-impact research opportunities aligned with business objectives.

• Analyze and interpret complex data sets, including survey responses, behavioral telemetry, and market intelligence, to construct cohesive, evidence-based perspectives that guide product strategy.

• Advocate for user-centered decision-making by presenting research findings to leadership, influencing product roadmaps, and championing user needs across the organization.

• Enhance the quantitative research practice at Mozilla by mentoring junior researchers, refining existing methodologies and tools, and scaling approaches to amplify the impact of user insights.

• Support iterative, user-centered product development by ensuring research continuously informs design iterations and strategic planning.

📝 Enhancement Note: The responsibilities highlight a blend of strategic ownership and hands-on execution. The role demands proficiency in influencing stakeholders and driving decisions, indicating a need for strong communication and influencing skills beyond pure analytical ability. The mention of "embedding research into product strategy" suggests a proactive rather than reactive approach to research.

🎓 Skills & Qualifications

Education: While not explicitly stated, a Master's or Ph.D. in a quantitative field such as Psychology, Statistics, Computer Science, Human-Computer Interaction, or a related discipline is typically expected for senior-level research roles.

Experience: 8+ years of experience in user research, product research, or an applied research setting with a strong emphasis on quantitative methodologies.

Required Skills:

• Extensive experience leading survey research across multiple phases of the product development lifecycle.

• Deep expertise in empirical survey methods, including planning, sampling, weighting, and statistical analysis.

• Proficiency in statistical programming using R for data analysis and survey data interpretation.

• Hands-on experience manipulating and integrating behavioral data using SQL to create comprehensive user narratives.

• Demonstrated ability to craft compelling narratives and visualizations from quantitative data.

• Proven success operating within fast-paced, agile environments, adapting to changing priorities while maintaining research impact.

• Strong judgment in balancing research depth with speed to deliver actionable and impactful insights.

• Experience with mixed-methods research, including collaboration with qualitative researchers.

Preferred Skills:

• Experience with various survey applications such as discovery, product needs assessment, prioritization, concept testing, panel surveys, intercept surveys, write-in analysis, and post-release measurement.

• Familiarity with contributing to open-source software development or communities.

• Experience in roles that directly influenced product roadmaps and strategic business decisions.

• Ability to mentor and guide junior researchers.

📝 Enhancement Note: The explicit requirement for R and SQL proficiency, along with extensive survey methodology expertise, clearly defines the technical backbone of this role. The emphasis on influencing product decisions and working in agile environments suggests a need for practical, impactful research rather than purely academic exploration. The "Sr Staff" designation implies a level of strategic thinking and potential for mentorship.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Showcase of past quantitative research projects, demonstrating end-to-end ownership from problem definition to actionable recommendations.

• Examples of survey design, sampling strategies, and statistical analysis applied to real-world product challenges.

• Case studies highlighting the integration of behavioral data (via SQL) with survey data to provide holistic user insights.

• Demonstrations of data visualization and storytelling skills used to communicate complex quantitative findings to diverse audiences, including non-technical stakeholders.

Process Documentation:

• Examples of how research plans were developed, including clear objectives, methodologies, and timelines.

• Documentation of how research findings were translated into actionable insights and recommendations for product teams.

• Evidence of collaboration with cross-functional teams (product, design, engineering, data science) throughout the research process.

• Showcase of how research was integrated into agile development cycles, supporting iterative product improvements.

📝 Enhancement Note: Given the "Sr Staff" level and the emphasis on influencing product strategy, a portfolio is expected to demonstrate not just technical proficiency but also strategic impact. Candidates should be prepared to articulate the "why" behind their research choices and the "so what" of their findings, linking them directly to business outcomes and product evolution.

💵 Compensation & Benefits

Salary Range:

• US Tier 1 Locations: $178,000 - $238,000 USD annually

• US Tier 2 Locations: $164,000 - $219,000 USD annually

• US Tier 3 Locations: $152,000 - $202,000 USD annually

Benefits:

• Generous performance-based bonus plans.

• Comprehensive medical, dental, and vision coverage.

• Generous retirement contributions with 100% immediate vesting.

• Quarterly all-company wellness days.

• Paid time off including country-specific holidays and a birthday day off.

• One-time home office stipend.

• Annual professional development budget.

• Quarterly well-being stipend.

• Considerable paid parental leave.

• Employee referral bonus program.

• Additional benefits such as life/AD&D, disability, and EAP (varies by country).

Working Hours: 40 hours per week (standard full-time).

📝 Enhancement Note: The provided salary ranges are specific to different US location tiers, reflecting cost of living adjustments. This indicates Mozilla's commitment to competitive compensation based on geographic factors. The benefits package is robust, with a strong emphasis on well-being, professional development, and financial security (retirement).

🎯 Team & Company Context

🏢 Company Culture

Industry: Technology, Software, Internet Services, Open-Source Software. Mozilla is a unique organization, backed by a non-profit, focusing on making the internet a better place for people, not just companies.

Company Size: Mozilla Corporation is part of a larger organization that has a significant global presence, with thousands of volunteer contributors and employees. The specific size of the Corporation is not detailed, but it operates at a scale that impacts millions of users worldwide.

Founded: Mozilla Corporation has been shaping the internet for over 25 years (implied by the description).

Team Structure:

• The Firefox User Research team is part of the broader Firefox product development organization.

• This role involves close partnership with Product Managers, Designers, Engineers, Data Scientists, and Marketing teams.

Methodology:

• A strong emphasis on human-centered exploration and data-driven decision-making.

• Utilizes both quantitative and qualitative research methods to understand user needs and inform product/design strategy.

• Focus on open-source principles and a mission-driven approach to technology.

• Commitment to diversity, equity, inclusion, and belonging in all aspects of work.

Company Website: mozilla.org

📝 Enhancement Note: Mozilla's mission-driven, non-profit-backed structure is a key differentiator. This translates into a culture that prioritizes user well-being and an open internet over shareholder profit. The emphasis on open-source and collaboration is likely to be deeply ingrained in the team's operational methodologies.

📈 Career & Growth Analysis

Operations Career Level: Senior Staff Quantitative User Researcher. This is a senior individual contributor role, signifying a high level of expertise, strategic impact, and potential leadership in a specialized domain. It implies autonomy and the ability to drive significant initiatives.

Reporting Structure: Likely reports to a Research Lead, Director of Research, or a senior Product/Design leader. The role involves extensive cross-functional collaboration with various teams.

Operations Impact: The insights generated directly influence product roadmaps, feature development, and strategic decisions for Firefox and other Mozilla products. This role has a direct impact on user experience, product adoption, and the overall mission of Mozilla.

Growth Opportunities:

• Specialization: Deepen expertise in advanced quantitative research methodologies, causal inference, or specific product areas.

• Leadership: Transition into management roles, leading a team of researchers, or taking on broader strategic research leadership responsibilities across multiple product lines.

• Cross-functional Influence: Expand influence beyond research into product strategy, program management, or even policy advocacy related to user privacy and open internet principles.

• Mentorship: Formal or informal mentorship of junior researchers, contributing to the growth of the research practice at Mozilla.

📝 Enhancement Note: The "Sr Staff" designation clearly positions this as a senior individual contributor role, where impact is measured by strategic influence and depth of expertise rather than direct team management. Growth pathways are likely to focus on increasing scope of influence, subject matter expertise, and mentorship.

🌐 Work Environment

Office Type: Fully Remote within the US. This indicates a distributed workforce and a reliance on digital collaboration tools.

Office Location(s): Remote US. While specific office buildings are not relevant for a remote role, the company operates globally, with a significant presence in the US.

Workspace Context:

• A fully remote environment necessitates strong self-discipline, proactive communication, and effective use of collaboration tools.

• Opportunities for deep collaboration with distributed product, design, and engineering teams.

• Access to a wide range of digital tools for research, communication, and project management.

• A culture that supports asynchronous work and respects work-life balance, as evidenced by wellness days and flexible benefits.

Work Schedule: Standard 40-hour work week, with flexibility expected within the remote, agile context. The company offers quarterly wellness days, suggesting a commitment to employee well-being and preventing burnout.

📝 Enhancement Note: The fully remote nature of this role means that successful candidates must be adept at asynchronous communication, self-management, and leveraging digital tools to maintain strong cross-functional relationships and research impact.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: Review of resume and application, potentially with a recruiter focusing on core qualifications.

• Hiring Manager/Recruiter Screen: Deeper dive into experience, motivation, and fit with the role and team.

• Portfolio Review & Presentation: Candidates will likely present a selection of their quantitative research projects, demonstrating their skills in survey design, data analysis, storytelling, and impact. This is a critical stage for a "Sr Staff" researcher.

• Cross-functional Interviews: Interviews with potential collaborators (e.g., Product Managers, Designers, Data Scientists) to assess collaboration style, communication, and strategic thinking.

• Executive/Senior Leader Interview: Final interview to assess strategic alignment, leadership potential, and overall fit with Mozilla's mission and values.

Portfolio Review Tips:

• Curate strategically: Select 2-3 of your strongest quantitative research projects that best showcase your skills relevant to this role (survey design, R/SQL analysis, influencing product decisions).

• Focus on impact: For each project, clearly articulate the problem, your approach, the insights derived, and most importantly, the impact your research had on product strategy or business outcomes. Quantify impact where possible.

• Showcase technical skills: Be prepared to discuss your methodology, statistical approaches, and how you used R and SQL.

• Tell a story: Structure your presentation logically, making it engaging and easy for interviewers to follow your thought process.

• Address mixed methods: If possible, highlight projects where you collaborated with qualitative researchers or integrated mixed-methods approaches.

Challenge Preparation:

• Be prepared for potential case studies or take-home assignments that involve analyzing a dataset, designing a survey, or outlining a research plan.

• Practice articulating your thought process for solving research problems under time constraints.

• Prepare to discuss how you would approach a novel research question relevant to Firefox or its users.

📝 Enhancement Note: The portfolio review will be a cornerstone of the interview process for this senior role. Candidates should prepare to not only present their work but also to deeply discuss their rationale, methodology, and the tangible outcomes of their research.

🛠 Tools & Technology Stack

Primary Tools:

• Statistical Programming: R (highly proficient, explicitly required)

• Data Manipulation: SQL (extensive hands-on experience required)

• Survey Platforms: Experience with various survey design and deployment platforms (e.g., Qualtrics, SurveyMonkey, custom internal tools) is implied.

• Data Visualization Tools: Tools for creating compelling charts and dashboards (e.g., Tableau, Power BI, R packages like ggplot2, or custom solutions).

Analytics & Reporting:

• Experience with analyzing behavioral data, user telemetry, and market intelligence.

CRM & Automation:

• While not explicitly mentioned, familiarity with CRM systems (e.g., Salesforce) and marketing automation tools might be beneficial for understanding user segmentation and campaign effectiveness, though not a primary focus.

📝 Enhancement Note: The emphasis on R and SQL is paramount. Proficiency in these tools is not just preferred but a core requirement for statistical programming and behavioral data analysis. The ability to integrate these with survey data is a key differentiator.

👥 Team Culture & Values

Operations Values:

• User-Centered: A deep commitment to understanding and advocating for user needs as the primary driver of product decisions.

• Data-Driven: Reliance on empirical evidence and rigorous analysis to inform strategy and decision-making.

• Openness & Transparency: Aligned with Mozilla's open-source ethos, valuing open collaboration, sharing of insights, and transparent methodologies.

• Mission-Driven: A passion for Mozilla's mission to make the internet a public resource for all, contributing to a healthier and more equitable online world.

• Inclusivity: Welcoming differences, being relationship-minded, practicing responsible participation, and valuing diverse perspectives.

Collaboration Style:

• Cross-functional Partnership: Proactive and collaborative engagement with product, design, engineering, and marketing teams.

• Evidence-Based Influence: Using research findings and data to persuade and build consensus among stakeholders.

• Mentorship & Knowledge Sharing: A willingness to share expertise, mentor junior colleagues, and elevate the collective research practice.

• Agile & Iterative: Adapting research approaches to fit agile development cycles, providing timely and relevant insights.

📝 Enhancement Note: The stated company values (Welcoming differences, Being relationship-minded, Practicing responsible participation, Having grit) are directly applicable to the team's operational culture and collaboration style. Candidates should be prepared to demonstrate how they embody these values in their work.

⚡ Challenges & Growth Opportunities

Challenges:

• Driving Strategic Impact: Ensuring that quantitative research insights consistently translate into tangible product improvements and strategic shifts, especially in a fast-paced environment.

• Balancing Depth and Speed: Delivering rigorous research within tight timelines and agile development cycles.

• Data Integration Complexity: Effectively synthesizing diverse data sources (surveys, behavioral, market) into cohesive narratives.

• Influencing Diverse Stakeholders: Communicating complex quantitative findings in a way that resonates with technical and non-technical audiences, including leadership.

• Maintaining Research Rigor: Upholding high standards of quantitative methodology while adapting to evolving product needs.

Learning & Development Opportunities:

• Advanced Methodologies: Opportunity to explore and implement more sophisticated quantitative techniques, such as causal inference, experimental design, or advanced Bayesian methods.

• Cross-Disciplinary Learning: Deepen understanding of product management, engineering, and marketing strategies by working closely with these teams.

• Leadership & Mentorship: Develop leadership skills through mentoring junior researchers and potentially leading larger research initiatives.

• Industry Engagement: Potential to attend conferences, contribute to open-source research tools, or represent Mozilla's research practices externally.

📝 Enhancement Note: The challenges are typical for a senior research role in a dynamic tech company, requiring strong problem-solving and strategic thinking. The growth opportunities highlight the potential for continued professional development and career advancement within Mozilla's research function.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you led a complex quantitative research initiative from start to finish. What was the business problem, your approach, and the impact of your findings?" (Focus on survey design, R/SQL, and influencing decisions).

• "How do you balance the need for research rigor with the speed required in an agile product development environment?" (Demonstrate judgment and practical application).

• "How would you approach sizing a new product opportunity for Firefox users using quantitative methods? What data would you seek and how would you analyze it?" (Showcase strategic thinking and methodological flexibility).

Company & Culture Questions:

• "What interests you about Mozilla's mission and how does that align with your approach to user research?" (Connect your passion to the company's purpose).

• "How have you fostered a user-centered culture within teams you've worked with?" (Provide examples of driving user empathy).

Portfolio Presentation Strategy:

• Structure: For each project, clearly outline: Problem/Opportunity -> Research Questions -> Methodology (Survey Design, Sampling, Analysis using R/SQL) -> Key Findings -> Recommendations -> Impact/Outcome.

• Data Storytelling: Use clear, concise visualizations. Focus on the narrative and the "so what" of your data. Avoid overwhelming interviewers with raw data.

• Technical Depth: Be prepared to discuss the nuances of your statistical methods, why you chose specific approaches, and how you validated your findings.

• Collaboration: Highlight how you partnered with cross-functional teams throughout the research process.

📝 Enhancement Note: Interview preparation should heavily emphasize the ability to translate complex quantitative analysis into clear, actionable insights that drive product strategy. Candidates must be able to demonstrate not only technical prowess but also strategic thinking, strong communication, and a deep understanding of user-centered product development.

📌 Application Steps

To apply for this operations position:

• Submit your application through the provided Greenhouse link.

• Tailor your resume: Highlight your 8+ years of quantitative user research experience, specifically mentioning your proficiency in R, SQL, and empirical survey methods. Quantify achievements and impact whenever possible.

• Prepare your portfolio: Select 2-3 key quantitative research projects that best demonstrate your ability to lead initiatives, conduct rigorous analysis, and influence product decisions. Ensure you can articulate the methodology, findings, and impact clearly.

• Research Mozilla's mission and products: Understand Firefox, Mozilla's commitment to an open internet, and their user-centered values. Prepare to discuss how your work aligns with these.

• Practice your presentation: Rehearse presenting your portfolio projects, focusing on storytelling, clarity, and demonstrating strategic thinking. Be ready to answer in-depth questions about your methodology and impact.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.

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