Senior Staff Data Scientist

Mozilla; Toronto; On-site; CAD 191,000 - 255,000; Full time

Benefits offered by this job

Bonus plans

Healthcare coverage

Retirement plan

Home office stipend

Professional development budget

Wellbeing stipend

Parental leave

Job summary

Mozilla is seeking a Senior Staff Data Scientist (P5) to join the Data Science organization, partnering with senior executives to turn ambiguity into clear, data-driven recommendations. You will influence Mozilla's long-term strategy by delivering sophisticated analyses on large-scale data.

You will mentor data scientists, lead technical direction, and elevate analytical work across the organization while collaborating with senior leaders and cross-functional teams to achieve impactful results.

Qualifications

• Exceptional Communication: Outstanding verbal and written communication skills, translating complex findings into clear, decision-ready recommendations.
• Influence Without Authority: Drive alignment across cross-functional teams with credible expertise.
• Technical Mastery: Deep expertise in Python or R, SQL, statistics and modern data science tooling.

Responsibilities

• Strategic Influence: Shape Mozilla's key business decisions with data-driven insights.
• Trusted Partnerships: Build relationships with senior leaders and cross-functional partners.
• Technical Excellence: Design and deliver analytical solutions for large-scale data with rigorous methodology.
• Mentorship and Growth: Mentor data scientists and guide technical direction.

Skills

Exceptional Communication

Influence Without Authority

Technical Mastery

Python

R

SQL

Statistics

Tools

Python

R

SQL

Statistics

Job description

Why Mozilla?

Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we're shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we're doing this while never losing our focus on our core mission to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren't beholden to any shareholders—only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms.

About This Team And Role

The Data Science organization shapes Mozilla's most important business decisions through data. As a Senior Staff (P5) Data Scientist, you will be an analytical leader, partnering with senior executives to turn ambiguity into clear, data-driven recommendations that influence Mozilla's long-term strategy.

What You'll Do

• Strategic Influence: Shape Mozilla's most important business decisions with rigorous, data-driven insights. Turn ambiguity into clear recommendations that influence executive thinking and long-term strategy.
• Trusted Partnerships: Build trusted relationships with senior leaders and cross-functional partners. Surface tradeoffs, align stakeholders with differing perspectives, and help teams make better, faster decisions.
• Technical Excellence: Design and deliver sophisticated analytical solutions to solve complex, ambiguous problems involving large-scale, high-dimensional data. Set a high technical bar through sound methodology, statistical rigor, and pragmatic execution.
• Mentorship and Growth: Serve as a technical leader within the Data Science community. Mentor data scientists, advise managers on technical direction, and elevate the quality of analytical work across the organization.

What You'll Bring

• Exceptional Communication: Outstanding verbal and written communication skills, with the ability to translate complex technical findings into clear, decision-ready recommendations while preserving analytical rigor. Proven success communicating effectively with both technical and executive audiences.
• Influence Without Authority: A track record of driving alignment across cross-functional teams, earning trust through expertise, and leading through influence rather than formal authority. Experience across multiple industries, domains, or problem spaces is a plus.
• Technical Mastery: Deep expertise in Python or R, SQL, statistics, and modern data science tooling. A strong foundation in analytical methods, paired with curiosity for emerging technologies and sound judgment about when to apply them.

What You'll Get

• Generous performance-based bonus plans to all eligible employees
• Rich medical, dental, and vision coverage
• Generous retirement contributions with 100% immediate vesting
• 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

About Mozilla

Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online.

Commitment to diversity, equity, inclusion, and belonging

Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities, and expressions.

We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at [e-mail] to request accommodation.

We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose.

Hiring Ranges

• Canada Tier 1 Locations: $191,000-$255,000 CAD
• Canada Tier 2 Locations: $173,000-$231,000 CAD