Senior Machine Learning Engineer, Recommendation

New
Based in the United StatesFull-TimeSenior
Salary not disclosed
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Job Details

Experience
5+ years
Required Skills
Machine LearningA/B testingDistributed Systems

Requirements

  • 5+ years of industry experience building and deploying production machine learning systems with significant ownership and technical leadership responsibilities.
  • Proven experience developing recommendation engines, search systems, ranking models, feed optimization systems, advertising ranking platforms, or content discovery solutions.
  • Strong background working on consumer-facing applications, particularly within social platforms, entertainment products, gaming ecosystems, creator platforms, or engagement-driven experiences.
  • Hands-on expertise with retrieval and ranking architectures, including embedding-based retrieval, candidate generation, two-tower models, feature engineering, and relevance optimization.
  • Strong understanding of online and offline evaluation methodologies, experimentation frameworks, and machine learning performance measurement.
  • Excellent product intuition with a deep understanding of relevance, engagement, retention, satisfaction, personalization, and content distribution dynamics.
  • Experience transforming large-scale behavioral data into meaningful machine learning signals and business outcomes.
  • Solid engineering fundamentals, including data pipelines, backend integrations, distributed systems, production ML deployment, and model lifecycle management.
  • Strong communication and collaboration skills with the ability to work effectively across technical and non-technical teams.
  • High degree of ownership, adaptability, and problem-solving ability in fast-paced and ambiguous environments.

Responsibilities

  • Design, build, and continuously improve recommendation and search systems across content feeds, discovery experiences, search functionality, and content continuation features.
  • Develop and optimize retrieval and ranking systems, including candidate generation pipelines, embedding-based retrieval, two-tower architectures, ranking models, and serving infrastructure.
  • Lead end-to-end experimentation efforts, including hypothesis development, A/B testing, performance analysis, and iterative model improvements.
  • Improve recommendation quality across key challenges such as cold-start users, newly created content, creator discovery, and rapidly evolving content ecosystems.
  • Build user, creator, content, and session-level representations using behavioral, contextual, and engagement signals.
  • Collaborate closely with Product, Data Science, and Engineering teams to define success metrics and deliver measurable improvements in engagement, retention, satisfaction, and content distribution.
  • Develop production-grade machine learning systems with robust monitoring, evaluation, scalability, and reliability standards.
  • Contribute to the evolution of long-term machine learning infrastructure and architecture supporting AI-native content discovery experiences.
  • Translate user behavior patterns and complex datasets into actionable machine learning solutions that enhance product performance and user experiences.
  • Stay current with emerging advancements in recommendation systems, ranking methodologies, retrieval techniques, and AI-powered personalization technologies.
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