Senior Data Scientist

$250,000 - $300,000
Full-time / Onsite (5 days/week)

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.

• 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)

• 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

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 to support your health—so you can feel your best, in and out of work.

💰 Financial Security – Plan for your future with a 401(k) plus company matching and fully covered life insurance—because peace of mind matters.

🌴 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.

🥗 Daily Fuel – Our office is stocked with an unlimited espresso and matcha bar, plus delicious lunch served five days a week. No sad desk lunches here.

🌿 Connection & Community – We value real relationships. From team lunches and office hangs to offsite retreats, we create space to connect and collaborate.

🚀 High-Impact Work – Be part of shaping the future of digital healthcare during an exciting period of growth and innovation.

💸 Competitive Compensation – We offer a top-of-market salary and a generous equity package—because you deserve to share in the upside you help create.

👩‍💻 World-Class Team – Join a team of thoughtful, driven professionals across engineering, product, clinical, operations, and beyond—each bringing excellence and empathy to the table.

💣 Profitable & Explosive Growth – Our growth is like trying to drink from a firehose while riding a rocket, as we commit to decisions that ensure long-term success, stability, and the well-being of our team and customers—all without the constraints of VC funding.

📍 Prime Location – Our vibrant downtown San Francisco HQ is just steps from public transit, great coffee shops, and everything the city has to offer.

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 in each job posting represents the minimum and maximum targets for new hire salaries across all locations. Actual compensation within this range is determined by various factors, such as job-related skills, experience, relevant education or training, and location.

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