Senior Data Scientist
About The Position
We’re a telehealth company helping people lose weight at scale. Experimentation 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.
Requirements
- Bachelor’s or Master’s in a quantitative field (e.g., Statistics, Engineering, Economics)
- Bachelor’s, Master’s, or PhD in a quantitative field (e.g., Statistics, Computer Science, 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 (Example: pharmacy, design, ops)
- Motivated by impact - you want your work to directly shape patient care and company growth
Responsibilities
- 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
Benefits
- Daily Meals and Espresso Bar - Breakfast, lunch, and dinner every weekday. Our on-site barista keeps the espresso and matcha flowing all day
- Pre-Tax Commuter Perks - Save on transit and parking through pre-tax commuter benefits
- Top-of-Market Compensation - We offer competitive salaries along with generous equity packages so you can share in the success you help create
- Profitable and Rapid Growth - We’re scaling fast, with financial discipline and long-term vision. No VC constraints, just sustainable momentum and smart decisions
- High-Impact Work - Help shape the future of digital healthcare. Your work here directly improves lives and scales nationwide
- World-Class Team - Collaborate with teammates from Tesla, SpaceX, Citadel, Harvard, IIT, and more. We value excellence, humility, and empathy in equal measure
- Comprehensive Benefits - 401(k) with match, generous time off, life insurance, and high-quality medical, dental, and vision plans.
- Time to Recharge – Enjoy unlimited PTO, generous company holidays, and true flexibility. We trust you to take the time you need to rest, reset, and thrive.
- Wellness First – From weekly mindfulness sessions to group workouts and fitness perks, your physical and mental health are top priority
- Team Socials and Community - We make time to connect through regular socials, happy hours, and spontaneous events. Our stocked kitchen doesn’t hurt either
- Downtown SF HQ - Our San Francisco office is just steps from BART, Muni, and great food. It’s designed for deep work and casual collaboration
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What This Job Offers
Job Type
Full-time
Career Level
Mid Level
Number of Employees
11-50 employees
