Eight Sleep

Machine Learning Engineer (Foundation Models & Personalization)

San Francisco · Full-time

Sponsorship not specifiedDetected 182 days ago

PythonSQLMachine LearningTensorFlowPyTorchSparkLLMsRAGA/B TestingForecastingAvidResearchCollaborationMentoring

About the role

This role is ideal for someone who loves end-to-end ownership: from problem framing → prototyping → offline evaluation → online experimentation → production deployment → iteration.
Apply and adapt foundation-model capabilities to real product workflows (LLM + tools/RAG, multimodal modeling, policy learning), including MCP-style integrations where helpful.
Productionize models: scalable training/inference pipelines, model monitoring, drift detection, alerting, and continuous improvement loops.

Every role at Eight Sleep is a chance to create cutting-edge technology, collaborate with world-class talent, and help shape a future where sleep isn't passive - it's a powerful tool for living better.
If you're tired of the ordinary and driven to build at the edge of what's possible, this is your moment.
Join us and lead the movement that's transforming how the world sleeps and what we're all capable of when we wake up.
Collaborate with cross-functional partners (Product, Mobile, Backend, Clinical) to scope requirements and ship high-impact features.
Build and deploy ML models that improve sleep experiences through personalization, prediction, and behavior understanding (e.g., readiness forecasting, event detection, individualized recommendations).
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.

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).
Strong product sense: you can translate ambiguous goals into measurable outcomes and iterate quickly with stakeholders.
Experience applying LLMs/foundation models to product features (tool use, retrieval, structured outputs, guardrails, evals).
Experience designing experimentation frameworks or causal inference approaches for personalization.
Pay grows rapidly as you accumulate experience with Eight Sleep and translate it into concrete impact.

Join the Sleep Fitness Movement
As the world's first sleep fitness company, we're redefining what it means to be well-rested and building the most advanced hardware, software, and AI technology to make it possible.
We are trusted by high performers, professional athletes, and health-conscious consumers in over 30 countries worldwide.
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).
Equitable compensation and continuous equity investment
We extend equity participation to every full-time team member, recognizing and rewarding your direct contributions to our success.
This includes periodic equity refreshments based on performance, ensuring that as Eight Sleep grows and succeeds, so do you - perfectly aligning your achievements with the broader triumphs of the company.
Your own Pod - and other great benefits

If you join us you'll get your own Pod, along with other benefits.
Learn more at eightsleep.com/careers http://eightsleep.com/careers
At Eight Sleep we continually celebrate the diverse community different individuals cultivate.
As an equal opportunity employer, we stay true to our values by ensuring everyone feels they can flourish and grow.
We are committed to equal employment opportunities regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status.
a Pod of their own.
We operate with intensity because our mission demands it.
At Eight Sleep, we're on a mission to fuel human potential through optimal sleep.

employment opportunities regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status

This listing is sourced directly from Eight Sleep's careers page and normalized into a canonical job model.