Sweatpals
Engineering
SeniorMachineLearningScientist
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“Senior Machine Learning Scientist at Sweatpals. Skills: Machine Learning, LLM, Production, Experimentation. Frame product problems as ML problems. Run end-to-end ML lifecycle”
What You'll Achieve.
Ship models that move our marketplace; Measure real user impact; Maximize host GMV; Maximize bookings; Make LLMs reliable; Measure if models move marketplace
Industry & Context.
Frame fuzzy product problems as ML problems; Pick the right approach
What They're Looking For.
Must Have
5+ years of applied ML experience shipping models to production, Python, SQL, Practical stats: experiment design, Comfortable with modern LLM tooling
Nice to Have
Experience in marketplaces, search, or recommendations, Advanced degree in ML, CS, stats, or a related field, PhD or research background, Familiarity with our stack: FastAPI, PostgreSQL, BigQuery, FAISS, sentence-transformers, AWS, Amplitude
What You'll Do.
Frame product problems as ML problems
Run end-to-end ML lifecycle
Push to the cutting edge
Ship models to production
Build evaluation harnesses
Develop LLM-powered features
Build agentic systems
Set the bar for ML rigor
How You'll Work.
Team & Collaboration
Partner closely with engineering; Partner with product; Partner with growth; Partner with our data analyst
Full Job Description
ABOUT SWEATPALS Sweatpals is the community-first fitness platform turning workouts into social experiences. Backed by a16z speedrun, Patron, Kevin Hart, Pear VC, and founders of Instacart and Dreamworks Animations, we connect hundreds of thousands of "pals," hosts, and gyms through events, memberships, and social features. We're still scrappy at heart, but scaling fast. We believe working out should be joyful, social, and inclusive, not just a solo grind. From run clubs and beach pilates to pickleball leagues and cold plunge socials, Sweatpals turns everyday workouts into meaningful social experiences. Sweatpals also gives local leaders the tools to grow their fitness communities from side hustles to full-time, even million-dollar businesses. Hosts use our platform to run their business, from ticketing and memberships to marketing tools. We're an AI-forward company. If you're excited about working at the intersection of ML, product, and a real marketplace, you'll fit right in. THE ROLE We're looking for a Senior Machine Learning Scientist to join the AI Squad and own the most ambitious ML work on our roadmap. You'll report to the Head of AI and partner closely with engineering and product to ship models that move our marketplace. This is a high-ownership role. You'll define problems, run the science, ship to production, and measure real user impact. You won't inherit a graveyard of half-finished notebooks. You'll build the next layer of ML at Sweatpals on top of what we've already shipped: semantic search, event tagging, collection ranking, retention models, and our LLM-powered HostCopilot and Front Desk Agent. You'll spend your time on problems like: - How do we rank events for each Pal so they discover more hosts they'd love? - Can we predict churn early enough for HostCopilot to nudge before it happens? - What's the right way to price a class or membership to maximize host GMV without hurting bookings? - How do we make LLMs reliable enough to draft host campaigns
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