Eight Sleep · 2 days ago
Machine Learning Engineer (Foundation Models & Personalization)
San Francisco
Full-time
Onsite
Entry, Mid Level
2+ years expEight Sleep is a pioneering company dedicated to enhancing human potential through optimal sleep. The Machine Learning Engineer will build and deploy AI systems aimed at personalizing sleep experiences and improving user engagement through data-driven insights and experimentation.
Consumer Electronics
Responsibilities
Build and deploy ML models that improve sleep experiences through personalization, prediction, and behavior understanding (e.g., readiness forecasting, event detection, individualized recommendations)
Apply and adapt foundation-model capabilities to real product workflows (LLM + tools/RAG, multimodal modeling, policy learning), including MCP-style integrations where helpful
Develop user behavior models that connect longitudinal signals (sleep, environment, routines) to actionable interventions - grounded in robust experimentation and measurement
Design evaluation strategies (offline metrics, slice-based analysis, calibration, reliability, fairness) and partner with Product to run high-quality online experiments
Productionize models: scalable training/inference pipelines, model monitoring, drift detection, alerting, and continuous improvement loops
Collaborate with cross-functional partners (Product, Mobile, Backend, Clinical) to scope requirements and ship high-impact features
Qualification
Required
2+ years building ML systems in production, ideally for consumer-facing products
Strong ML fundamentals across supervised learning, sequence/time-series modeling, and modern deep learning
Hands-on experience with large-scale model training and evaluation (PyTorch/TensorFlow/JAX), and strong Python engineering practices
Experience with personalization systems (ranking/recommendations, segmentation, lifecycle modeling, propensity/behavior modeling, causal/experiment-aware thinking)
Fluency with data tooling (SQL, distributed compute such as Spark/Ray, and cloud storage/compute)
Strong product sense: you can translate ambiguous goals into measurable outcomes and iterate quickly with stakeholders
Preferred
Experience applying LLMs/foundation models to product features (tool use, retrieval, structured outputs, guardrails, evals)
Experience with multimodal data (sensor signals + context) and/or health/biometrics data
Experience with privacy-preserving approaches (on-device/federated learning, differential privacy, data minimization)
Experience designing experimentation frameworks or causal inference approaches for personalization
Benefits
Every Eight Sleep employee receives the very product that defines our mission: a Pod of their own.
Equitable compensation and continuous equity investment
Periodic equity refreshments based on performance
Company
Eight Sleep
Eight Sleep is the world’s first sleep fitness company. Our mission is to fuel human potential through optimal sleep.
51-200 employees
H1B Sponsorship
Eight Sleep has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1)
2024 (2)
Funding
Current Stage
Growth StageLeadership Team
Matteo Franceschetti
Co-Founder & CEO
Nicolas C.
Chief Financial Officer
Recent News
Tech Startups - Startups and Technology news
2025-08-26
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