Senior Data Scientist

Mochi Health’s mission is to be the discovery layer of healthcare. We are building a platform that makes it easier for patients to find the right providers, access the right medications, and take control of their health with transparency and trust.

Over the past few years, we have experienced rapid growth by combining operational excellence, clinical expertise, and innovative technology to deliver care that is more human, intuitive, and effective. From pharmacy pricing transparency and personalized medication management, to long-term medical record access and community-based chronic illness support, Mochi is creating a new model of care that empowers patients, providers, and pharmacies alike.

We believe the future of healthcare is personal, and we are building the technology to power it. At Mochi Health, you will join a team that values inclusivity, collaboration, and bold thinking, and you will have the opportunity to do the most meaningful work of your career.

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

About The Role

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.

What You’ll Do

• 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

Who You Are

• 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

Life at Mochi 💫

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 c