Sr Staff Machine Learning Engineer

We exist to wow our customers. We know were doing the right thing when we hear our customers say How did we ever live without Coupang Born out of an obsession to make shopping eating and living easier than ever were collectively disrupting the multi-billion dollar e-commerce industry from the ground up. We are one of the fastest-growing e-commerce companies that established an unparalleled reputation for being a dominant and reliable force in South Korean commerce.

We are proud to have the best of both worlds a startup culture with the resources of a large global public company. This fuels us to continue our growth and launch new services at the speed we have been since our inception. We are all entrepreneurs surrounded by opportunities to drive new initiatives and innovations. At our core we are bold and ambitious people that like to get our hands dirty and make a hands-on impact. At Coupang you will see yourself your colleagues your team and the company grow every day.

Our mission to build the future of commerce is real. We push the boundaries of whats possible to solve problems and break traditional tradeoffs. Join Coupang now to create an epic experience in this always-on high-tech and hyper-connected world.

Role Overview

What You Will do

• 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 such as transformer-based models contrastive learning and vector search
• Drive innovation in search relevance and user intent modeling using large language models (LLMs) embedding-based retrieval and multi-modal learning
• Build and optimize ML pipelines using tools such as Apache Spark Airflow Kubeflow and MLflow ensuring reproducibility scalability and operational excellence
• Define and track key performance metrics to evaluate model impact and identify high1leverage 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

Basic Qualifications

• Bachelors degree in computer science electrical engineering mathematics statistics or closely related fields
• 4 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

Preferred Qualifications

• Masters or PhD in relevant technical fields
• Experience with search systems information retrieval or recommendation engines
• Experience with LLMs embeddings and vector search technologies
• Experience with cloud platforms such as AWS Google Cloud Platform including services like Vertex AI BigQuery or SageMaker
• Experience working in startup or high-growth environments
• Proven ability to lead-cross-functional teams and deliver results in a multicultural global organization
• Hands-on experience with modern ML frameworks such as TensorFlow PyTorch Scikit1learn Keras XGBoost LightGMB and
• Experience with ML lifecycle tools such as MLflow Kubeflow Weights & Biases or Amazon SageMaker
• Excellent communication skills with the ability to explain complex technical concepts to both technical and non-technical stakeholders
• Demonstrated ability to work independently and manage ambiguity in fast-paced environments

Pay & Benefits

Our compensation reflects the cost of living across several US geographic markets. At Coupang your base pay is one part of your total compensation.

The base pay for Staff position ranges from $152K/year to $277K/year. Pay is based on several factors including market location and may vary depending on job-related knowledge skills and experience.

General Description of All Benefits

• Annual bonus is 0-20% of the base salary
• Medical/Dental/Vision/Life AD&D insurance
• Flexible Spending Accounts (FSA) & Health Savings Account (HSA)
• Long-term/Short-term Disability
• Employee Assistance Program (EAP) program
• 401K Plan with Company Match
• 18-21 days of the Paid Time Off (PTO) a year based on the tenure
• 12 Public Holidays
• 6 weeks Paid Parental leave
• Pre-tax commuter benefits
• MTV - Free Electric Car Charging Station

General Description of Other Compensation

Other Compensation includes but is not limited to bonuses equity or other forms of compensation that would be offered to the hired applicant in addition to their established salary range or wage scale.

Coupang is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to actual or perceived race (including traits historically associated with race including but not limited to hair texture and protective hair styles) color religion religious creed (including religious dress and grooming practices) sex or gender (including pregnancy childbirth breastfeeding and medical conditions related to pregnancy childbirth or breastfeeding) gender identity gender expression sexual orientation ancestry national origin (including language use restrictions) age (40 and over) physical or mental disability medical condition genetic information HIV/AIDS or Hepatitis C status family status (including but not limited to marital or domestic partnership status) military or veteran status use of a trained dog guide or service animal political activities or affiliations ancestry citizenship family and medical leave status status as a victim of any violent crime or any other characteristic or class protected by the laws or regulations in the locations where we operate.

Recruitment Process

• Application Review - Phone Interview - Onsite (or Virtual Onsite) Interview Offer

• The exact nature of the recruitment process may vary according to the specific job and may be changed due to scheduling or other circumstances.

• Interview schedules and the results will be informed to the applicant via the e-mail address submitted at the application stage.

Details to Consider

• This job posting may be closed prior to the stated end date for application if all openings are filled.

• Coupang has the right to rescind an offer of employment if a candidate is found to have submitted false information as part of the application process.

• Those eligible for employment protection (recipients of veterans benefits the disabled etc.) may receive preferential treatment for employment in accordance with applicable laws.

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Job Req: R0069012