Sekai

Senior Machine Learning Engineer, Recommendation

Sekai
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6 hours ago

Responsibilities

  • Build and improve recommendation and search systems for feed, discovery, search, and content-continuation surfaces.
  • Own candidate generation, embedding-based retrieval, two-tower models, ranking features, and online serving quality.
  • Design, launch, and analyze recommendation and search experiments end to end.
  • Build user, content, creator, and session-level representations from behavioral signals.
  • Partner with product, data, and engineering teams to define metrics and ship improvements to retention, engagement, and content distribution.
  • Develop practical ML systems that move from prototype to production with monitoring and evaluation.
  • Help shape the long-term ML architecture for AI-native content discovery.

Requirements

  • At least 5 years of industry experience building production ML systems, including senior-level ownership of recommendation, search, ranking, ads ranking, feed ranking, or content discovery systems.
  • Hands-on experience building recommendation or search systems for consumer applications.
  • Experience with entertainment, social, gaming, short-form content, creator, or other engagement-driven consumer products.
  • Strong practical experience with two-tower models, embedding retrieval, candidate generation, ranking, and online/offline evaluation.
  • Strong product intuition around relevance, retention, engagement, satisfaction, cold start, and content distribution.
  • Ability to turn messy user behavior into useful modeling signals and practical product improvements.
  • Strong engineering fundamentals across modeling, data pipelines, backend integration, experimentation, and production ML systems.
  • Experience with AI recommendation, LLM-powered ranking, semantic search, personalized generation, UGC ecosystems, multimodal content understanding, explore/exploit, contextual bandits, reinforcement learning, or long-term value optimization is a plus.
  • Startup experience or experience building zero-to-one ML systems with limited infrastructure is a plus.

Benefits

  • Remote-first work across all positions.
  • Competitive salary and meaningful equity.
  • Comprehensive health insurance and benefits.
  • Opportunity to work with an AI-native team on early-stage consumer social and interactive entertainment products.

Tech Stack

iOS

Categories

Sekai

About Sekai

11-50 employees
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