Staff ML Engineer - Ads Personalization & Search

coupanginternal; Mountain View (WY); On-site; USD 180,000 - 240,000; Full time

Job summary

Coupang is transforming everyday life with high-tech ecommerce. This Staff ML Engineer role within Coupang Media Group focuses on Ads Quality, building scalable models and new features for our advertising platform.

You will design large-scale ML systems, optimize search ranking and product discovery, mentor engineers, and partner with product and data science teams to align tech with business goals.

Qualifications

• Bachelor's degree in computer science, electrical engineering, mathematics, statistics or closely related fields.
• 6 years of professional experience in applied machine learning.
• Experience in machine learning, deep learning, and statistical modeling.
• Proficiency in Python and/or Java, with experience in building production grade ML systems.

Responsibilities

• Design features and build large-scale machine learning models and systems to improve ad targeting, relevance, ranking, and engagement.
• Design and implement large-scale ML systems for search ranking, semantic retrieval, query understanding, and personalized product discovery using state-of-the-art techniques.
• Drive innovation in search relevance and user intent modeling using large language models, embedding-based retrieval, and multi-modal learning.
• Build and optimize ML pipelines using tools such as Apache Spark, Airflow, Kubeflow, and MLflow, ensuring reproducibility and scalability.
• Define and track key performance metrics to evaluate model impact and identify leverage opportunities for improvement.
• Collaborate cross-functionally with product, engineering, and data science teams to align technical solutions with business goals and customer experience.
• Mentor and grow engineering talent, fostering a culture of technical excellence, experimentation and continuous learning.

Skills

Machine learning

Deep learning

Python

Java

Information retrieval

Vector search

Production ML

Education

Bachelor's degree in CS/EE/Math/Stats

Master's or PhD in relevant field

Tools

Apache Spark

Kubeflow

MLflow

Airflow

TensorFlow

PyTorch

Scikit-learn

Keras

Job description

Coupang is transforming everyday life with high-tech ecommerce. This Staff ML Engineer role within Coupang Media Group focuses on Ads Quality, building scalable models and new features for our advertising platform.

You will design large-scale ML systems, optimize search ranking and product discovery, mentor engineers, and partner with product and data science teams to align tech with business goals.