Staff, Machine Learning Engineer - Coupang Play

The role

The Staff Machine Learning Engineer designs, builds, and operates scalable machine learning platforms and production ML services. This role focuses on OTT content recommendation, personalization, and user viewing experience through large-scale systems in search, retrieval, and ranking.

What you will do

• Design, develop, and operate architecture for large-scale Search, Retrieval, Ranking, Recommendation, and Personalization platforms
• Build content discovery solutions to improve user experience
• Develop machine learning based systems modeling user intent, content relationships, and user preferences
• Design and operate scalable, low-latency online serving infrastructure for real-time services
• Improve search and recommendation quality using Offline Evaluation, Online Experimentation, and A/B Testing
• Define and optimize key metrics such as Relevance, Engagement, Conversion, Latency, and Reliability
• Implement business requirements into scalable technical solutions through collaboration with ML Scientists and Product Managers
• Review and adopt latest search, recommendation, and personalization technologies

Required qualifications

• Bachelor's degree or higher in Computer Science, Machine Learning, Artificial Intelligence, or related fields
• 7+ years of software engineering experience including development and operation of Search, Retrieval, Recommendation, Ranking, Personalization, or other Relevance based systems
• Experience designing and developing distributed backend systems considering Scalability, Reliability, and Low-Latency
• Proficiency in Python
• Experience using one or more of Go, Java, Scala, or C++
• Experience developing in Cloud Native infrastructure and modern software engineering environments
• Understanding or experience in Search Platform, Vector Search, large-scale Indexing System, or Recommendation Infrastructure
• Experience improving customer experience using data-driven approaches based on machine learning concepts
• Problem-solving and analytical skills to analyze and measure system performance
• Communication skills to collaborate with engineering, product, and data science organizations

Nice to have

• Experience with Lexical Retrieval, Semantic Retrieval, Embedding-based Retrieval, Hybrid Retrieval, or Learning-to-Rank technologies
• Understanding of Content Discovery fields such as Information Retrieval, Recommendation System, Ranking System, or Personalization
• Experience applying Deep Learning, Foundation Model, LLM, or Generative AI to Search, Recommendation, or Content Discovery problems
• Experience operating Experimentation Platform, Online Evaluation, A/B Testing, or Relevance Measurement Framework
• Experience building multilingual content search or recommendation services

Before you apply

• This posting is exclusively for internal employees
• Complete the attached Internal Transfer Request Form
• Submit via Coupang email address

About the company

Coupang Play is Coupang's OTT service providing various content including original content, TV series, movies, sports, and more. It features a global tech organization distributed in Seoul, Singapore, and California.