Senior Data Scientist

Role Description

At Thrive Market, our ML (Data Science) team drives meaningful impact for both our members and the business by transforming data into insights, models, and systems that shape every part of the e-commerce grocery journey. We’re looking for a Senior Data Scientist to play a critical role within our ML team. In this role, you’ll own high-impact analytical and modeling initiatives end-to-end, partnering closely with Product, Engineering, and Analytics to influence strategy, improve customer experience, and drive measurable business outcomes.

• Own and deliver high-impact data science initiatives, from problem definition and data exploration to modeling, validation, and productionization, driving measurable improvements in customer experience and business metrics.
• Partner closely with Product, Engineering, and Analytics to shape roadmaps, define success metrics, and translate ambiguous business problems into well-scoped analytical or modeling solutions.
• Partner with Engineering and DevOps to deploy, operate, and scale ML workloads using cloud-native infrastructure and MLOps tooling (e.g., AWS SageMaker, Lambda, S3, ECR, Docker, Kubernetes).
• Design, build, and iterate on statistical models, machine learning systems, and decision frameworks (e.g., personalization, ranking, forecasting, experimentation analysis).
• Lead rigorous experimentation and measurement practices, including A/B test design, hypothesis formulation, metric selection, causal inference, and interpretation of results.
• Communicate insights, trade-offs, and recommendations clearly to both technical and non-technical stakeholders, influencing decisions at the pod and org level.
• Ensure high standards of quality and reliability in data science outputs through code reviews, model validation, documentation, and monitoring.
• Proactively identify opportunities and risks in data, modeling, or experimentation approaches, and drive improvements that enhance scalability, accuracy, and long-term impact.
• Mentor and support other data scientists through technical guidance, feedback, and best-practice sharing, without direct people management responsibility.

Qualifications

• 5+ years of experience in data science, applied machine learning, or a related quantitative role, with demonstrated ownership of end-to-end projects.
• Strong grounding in ML, statistics, experimentation, and data analysis, including hypothesis testing, causal reasoning, and metric design.
• Experience building and deploying production-grade models or analytical systems in collaboration with engineering teams, including hands-on experience with cloud-based ML infrastructure (e.g., AWS SageMaker, Lambda, S3, ECR) and containerized workflows (Docker, Kubernetes).
• Proven experience designing, analyzing, and interpreting A/B tests in production environments, aligned to business or product goals, including defining success metrics and guarding against common statistical pitfalls.
• Ability to work effectively with cross-functional partners (Product, Engineering, Analytics, Design, Data Engineering), translating between business context and technical solutions.
• Strong problem-framing and prioritization skills, particularly in ambiguous or under-specified problem spaces.
• Proficiency in SQL and Python, with experience using modern data and ML tooling.
• Ownership mindset: proactively identifying problems worth solving, taking accountability for outcomes, and driving initiatives forward independently.

Requirements

• Hands-on experience with search, personalization, recommendations, ranking, or lifecycle modeling.
• Experience with MLOps best practices, including model versioning, CI/CD for ML, monitoring, and operating models in containerized and orchestrated environments (Docker, Kubernetes).
• Experience in e-commerce, marketplace, or subscription-based businesses.
• Familiarity with working in environments with moderate technical debt or evolving data foundations.
• Experience defining and owning metrics, experimentation frameworks, or model performance monitoring in production.
• Demonstrated ability to influence beyond immediate project scope, shaping best practices, standards, or strategy across teams.

Benefits

• Comprehensive health benefits (medical, dental, vision, life and disability)
• Competitive salary (DOE) + equity
• 401k Employer Match
• 9 Days of Observed Holidays
• Flexible Paid Time Off
• Subsidized ClassPass Membership with access to fitness classes and wellness and beauty experiences
• Ability to work in our beautiful office in Playa Vista
• Free Thrive Market membership with exclusive employee discount
• Coverage for Life Coaching & Therapy Sessions on our holistic mental health and well-being platform