Senior Data Scientist (MCM)

About Moloco: Moloco builds some of the most powerful AI advertising solutions in the world. Our name—short for "machine learning company"—reflects our core mission: democratizing access to the advanced AI that has historically been reserved for tech giants. Led by machine learning pioneers who built some of the most successful ad systems at Google, including YouTube's monetization engine and key search advertising technologies, we’re transforming how businesses grow and compete in the digital economy. Built with AI from day one, Moloco’s planet-scale machine learning platform powers a suite of solutions for advertising growth and monetization.

The Impact You’ll Be Contributing to Moloco: Moloco Commerce Media (MCM) enables marketplaces to leverage recent advances in AI to deliver highly relevant ads powered by first-party data. MCM has established strong product-market fit and is a key growth engine for Moloco as we expand our footprint with leading global and regional commerce platforms. As a Senior Data Scientist on the MCM team in London, you will play a key role in accelerating MCM’s expansion. You will act as a strategic technical contributor, partnering closely with cross-functional stakeholders to onboard and optimize marketplace platforms. You will evaluate the performance of MCM platforms across our ad-tech stack (ranking, retrieval, and bidding), identify actionable insights, and help translate them into measurable partner impact.

The Opportunity: In this role, you will:

• Optimize Platform Performance: Conduct deep-dive analyses using large-scale data to understand platform performance, advertiser outcomes, and marketplace dynamics, and translate findings into actionable recommendations for product and business teams.
• Define Success Frameworks: Design and refine the metric frameworks that evaluate and quantify platform performance. Leverage these frameworks to identify and propose new opportunities for platform growth.
• Influence MCM’s Product and Engineering Roadmap: Proactively define feature priorities by conducting deep-dive analyses that uncover high-impact growth opportunities. Partner with leadership to translate these insights into a technical vision that guides the development of the MCM platform.
• Present Complex Insights to Executive Audiences: Simplify intricate data science concepts for non-technical stakeholders and drive the technical narrative in Quarterly Business Reviews (QBRs). Build trust with customer leadership through clear, data-driven storytelling and strategic frameworks.
• Drive High-Impact Platform Launches: Lead cross-functional efforts with Sales and Customer Engineering to ensure seamless marketplace launches. Help onboard, support, and scale new marketplace platforms onto MCM and deliver the post-launch executive readouts that validate success.
• Uphold Data Science Excellence: Apply best practices in analysis, modeling, and experimentation. Contribute to a strong data culture by sharing knowledge and supporting peer development within the MCM team.

How Do I Know if the Role is Right For Me? You enjoy owning high-impact analyses from problem definition through execution and recommendation. You are comfortable operating in ambiguity and structuring open-ended business questions into analytical frameworks. You are a strong collaborator who can partner effectively with product, engineering, and commercial stakeholders. You are motivated by translating data into practical impact for real marketplace partners.

Minimum Qualifications:

• 4+ years of industry experience in data science, analytics, or a related field (or an advanced degree with 2+ years of high-impact industry experience).
• Bachelor’s, Master’s and/or PhD in a quantitative discipline (e.g. Statistics, Operations Research, Economics, Mathematics, etc.).
• Demonstrated ability to drive product strategy: You have a track record of using data to define feature roadmaps and influence long-term business goals.
• Strong proficiency in Python and SQL, with experience analyzing large-scale datasets.
• Solid foundation in statistics, including experimental design, hypothesis testing, and various statistical analysis techniques such as regression.
• Excellent communication skills with experience presenting technical findings to non-technical leadership or external partners.
• Ability to build strong relationships and collaborate effectively in a global, cross-functional organization.

Preferred Qualifications:

• Experience in ad-tech, marketplace, or e-commerce environments (specifically bidding, ranking, or auction logic).
• Experience evaluating machine learning models in production, including experimentation and ongoing performance monitoring.
• Prior experience in a client-facing or consultative data science role, supporting external partners through data-driven insights.
• Experience working with geographically distributed teams and stakeholders.

Moloco Thrive: Benefits and Well-Being: We take care of you and create the conditions for you to do the best work of your career. Through a lens of inclusion, we offer innovative benefits that empower our employees to take care of themselves and their families so they can do the best work of their lives.

Moloco Values: Lead with Humility: Everyone’s voice is respected, valued, and heard. With humility, we become more open and accessible to each other. We win, lose, and learn together. Accountability and feedback are essential to our success. Uncapped Growth Mindset: We see all situations as opportunities to learn, grow, and improve as individuals and as an organization. We seek diverse perspectives, encourage curiosity, and promote experimentation to push the boundaries of what’s possible. Create Real Value: We pursue the most impactful opportunities with rigor and integrity. We take intelligent risks and make disciplined trade-offs to maintain deep focus. We help our customers win by delivering durable value. Go Further Together: We’re one team working towards one mission and vision. We collaborate proactively and inclusively, involving the right people at the right time and in the right way. We strive to create a more equitable workplace. We won’t let each other fail.

Equal Opportunity: Creating a diverse workforce and a culture of inclusion and belonging is core to our existence. To reach our goals, diversity of talent and thought is a critical component of how we operate as an organization. Our workforce is our superpower, and we know that fostering a culture of inclusion, authenticity, and belonging gives us the greatest opportunity to achieve our vision to become the scaling engine for the Internet economy. Moloco is an equal opportunity employer. We highly value diversity in our current and future employees and do not discriminate (including in our hiring and promotion practices) on the basis of race, color, creed, religion, national origin, age, sex and gender, gender expression and identity, sexual orientation, marital status, ancestry, physical or mental disability, military or veteran status, or any other characteristic protected by law.