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Senior AI/ML Researcher (Foundation AI)

Boston, MA💼 Full-time💰 $190,000–$190,000🗓 2026-07-10 → 2026-09-26

Core

Design, train, and optimize large-scale multimodal foundation models integrating wearable sensor data, text, biomarkers, and behavioral data to understand human physiology and behavior.

Role type

Senior individual contributor AI/ML researcher (foundation models)

Builds

Scalable AI systems and multimodal foundation models for health and fitness wearables

Domain

Health technology / Wearables / Deep Learning

Deliverable

production ML models

Required skills

Advanced deep learning (transformers, state space models), multimodal model training, self-supervised learning, representation learning, distributed training pipelines, reinforcement learning (PPO, DPO, GRPO), MLOps, Python, PyTorch/TensorFlow

Preferred skills

Experience with multi-node/multi-GPU environments, data/model/context parallelisms, post-training for downstream applications

Technologies

PyTorch, TensorFlow, distributed compute environments

Responsibilities

Design and optimize large-scale multimodal foundation models; conduct applied research in self-supervised and representation learning; develop scalable distributed training pipelines; collaborate on MLOps and production deployment; partner with product teams to translate model capabilities into features; contribute to technical roadmap and architectural direction; ensure ethical and privacy-preserving AI standards

Seniority

Senior, hands-on IC

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