Senior Machine Learning Engineer

Own retrieval/ranking: candidate generation, embeddings, two-tower models, features, and serving quality. Two-tower models, embedding retrieval, candidate generation, ranking, and online/offline evaluation.

Location: United States - remote
Visa: US Citizens or Green Card Holders


Fluency in Chinese/Mandarin is required, so only reach out exclusively to candidates of Chinese ethnic background.

What you will own

• Build recommendation and search across feed, discovery, search, and content continuation.
• Own retrieval/ranking: candidate generation, embeddings, two-tower models, features, and serving quality.
• Design, launch, and analyze recommendation/search experiments.

Requirements

• 5+ years industry experience building production ML systems with senior ownership.
• Bachelor's degree from a recognized university in China is required 
• Hands-on recommendation, search, ranking, ads ranking, feed ranking, or content discovery systems.
• Consumer apps, entertainment, social, gaming, creator, or engagement-driven products.
• Two-tower models, embedding retrieval, candidate generation, ranking, and online/offline evaluation.

Hard filters

• 5+ years industry experience building production ML systems with senior ownership.
• Hands-on recommendation, search, ranking, ads ranking, feed ranking, or content discovery systems.
• Consumer apps, entertainment, social, gaming, creator, or engagement-driven products.
• Two-tower models, embedding retrieval, candidate generation, ranking, and online/offline evaluation.

Strong fit

• Build recommendation and search across feed, discovery, search, and content continuation.
• Own retrieval/ranking: candidate generation, embeddings, two-tower models, features, and serving quality.
• Background in the entertainment or social media industry (e.g., TikTok, Pinterest, Instagram). 
• Design, launch, and analyze recommendation/search experiments.

Bonus:

• Bonus signal: 5+ years production ML
• Bonus signal: recommendation systems
• Bonus signal: search ranking
• Bonus signal: embedding retrieval

Anti-signals

• Cannot show core Senior Machine Learning Engineer, Recommendation experience
• Not comfortable with the listed work mode
• Low ownership, coordination-only, or no shipped examples

This is a remote position.