Senior Data Scientist

About The Role

We’re a telehealth company helping people lose weight erimentation is central to our growth and patient experience—we need to know what truly works, what doesn’t, and why. We’re looking for a Senior Data Scientist who thrives on designing, running, and interpreting experiments across product, pharmacy, and design. You’ll work side-by-side with clinicians, designers, and engineers to push forward a culture of evidence-based decision-making.

This role is ideal for someone who wants to set the standard for how experiments are run at Mochi Health—bringing statistical rigor, practical intuition, and a deep sense of ownership.

• Own the design and execution of experiments (A/B tests, quasi-experiments) across pharmacy, design, and product flows
• Partner with design and pharmacy teams to ideate, prioritize, and scope impactful experiments
• Build frameworks and tools to standardize experimentation and causal inference across teams
• Ensure experiment integrity—sample sizing, randomization, stopping rules, multiple-testing corrections
• Move beyond binary “did it win?” to nuanced insights: heterogeneous treatment effects, and trade-offs
• Automate experiment reporting and integrate results into dashboards / internal tools
• Mentor teammates and set best practices for experimentation at the company

• Bachelor’s or Master’s in a quantitative field (e.g., Statistics, Engineering, Economics)
• 4+ years of industry experience in applied experimentation (growth or product preferred)
• Deep expertise in causal inference methods (A/B testing, DiD, matching, Bayesian methods)
• Strong Python and SQL skills; capable of building reusable frameworks, not just one-off analyses
• Clear communicator who can translate complex experimental results into actionable recommendations
• Comfortable with ambiguity, fast iteration, and working across very different teams (e.g., pharmacy, design, ops)
• Motivated by impact - you want your work to directly shape patient care and company growth

At Mochi, we believe your best work happens when you feel your best—so we’ve designed an environment that fuels your creativity, supports your growth, and makes every day exciting.

• Comprehensive Health Coverage – Robust medical, dental, and vision insurance
• Financial Security – 401(k) with company matching and fully covered life insurance
• Time to Recharge – Unlimited PTO, generous holidays
• Wellness First – Mindfulness, group workouts, fitness perks
• Daily Fuel – Office espresso and matcha bar, lunch five days a week
• Connection & Community – Team lunches, offsite retreats
• High-Impact Work – Shape the future of digital healthcare
• Competitive Compensation – Top-of-market salary and equity
• World-Class Team – Cross-functional colleagues
• Profitable & Explosive Growth – Long-term stability and growth
• Prime Location – San Francisco HQ

The base salary for this full-time position ranges from $250,000 to $300,000, in addition to equity and benefits. The salary range listed represents the minimum and maximum targets for new hire salaries across all locations. Actual compensation is determined by various factors, including skills, experience, and location.

#LI-Onsite

Mochi Health is an in-person company based in San Francisco, CA. Our team works together in person five days a week to foster collaboration, innovation, and strong connections. For office-based roles, the standard schedule is Monday through Friday, 9:00 a.m. to 7:00 p.m. All employees receive meal and rest breaks in accordance with applicable laws. For designated remote roles, this in-person policy does not apply.

Mochi Health is an Equal Opportunity Employer. We provide equal employment opportunities to all applicants and employees without discrimination on the basis of race, religion, color, national origin, gender, sexual orientation, gender identity, age, veteran status, disability, or any other legally protected characteristic.

Mochi Health complies with the ADA and applicable laws. If you need accommodations, contact