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Principal Machine Learning Engineer

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Principal Machine Learning Engineer in USA

  • Remote

Responsibilities

  • Own the recommendation and search personalization strategy across all product surfaces.
  • Build end-to-end ML systems for ranking, retrieval, and personalization, including data pipelines, feature engineering, model training, evaluation, and production serving infrastructure.
  • Design and interpret experiments that improve relevance and ranking and connect model gains to measurable user outcomes.
  • Partner with Product and Engineering to integrate models and ensure reliable production performance.
  • Collaborate with Data and Security on scalable architecture addressing data access, privacy, compliance, and operational requirements.
  • Mentor engineers, contribute to hiring, and raise ML fluency across R&D.

Requirements

  • Demonstrated experience building recommendation and/or search systems operating in production at scale.
  • Strong ML engineering fundamentals in ranking, retrieval, feature engineering, model training and evaluation, and deployment.
  • Proven ability to connect model improvements to measurable user and product outcomes through structured experimentation.
  • Strong software engineering skills, including reliable pipelines and services, maintainable code, and debugging complex distributed systems.
  • Ability to communicate trade-offs clearly and align Product and Engineering teams on direction.
  • Preferred: experience in health, fitness, or consumer-facing recommendation platforms.
  • Must be authorized to work in the United States without sponsorship.

Benefits

  • Remote role in the United States.
  • Employment is at-will, subject to applicable state laws.

Salary: $185k - $205k/yr

iFIT

iFIT builds connected fitness equipment and a subscription training platform for consumers, gyms, and studios through brands like NordicTrack, ProForm, Freemotion, and the iFIT app. The company sells hardware plus recurring digital content that powers interactive cardio, strength, and recovery wo...

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