Senior Staff Machine Learning Engineer-Growth Marketing

(Senior) Staff Machine Learning Engineer, Generative AI, Growth Marketing 

About Growth Marketing ML 

In Growth Marketing, our goal is to increase the number of transacting Customers while also growing their purchase frequency and lifetime value. We build core platforms and services that power Coupang’s growth, including Search Advertising, Affiliate Platform, Display Targeting & Re-targeting, CRM, Audience Platform, and other marketing services for landing, tracking & attribution. 

Our ML team drives innovation across these platforms, including recommendation, personalization, budget optimization, keyword bidding, and creative optimization. We are now expanding into Large Language Models (LLMs) and Generative AI to transform how we optimize ads, creatives, and product recommendations at scale. 

This is an exceptional opportunity to join a high-impact team and directly shape the future of LLM-powered growth marketing at Coupang. 

  

Basic Qualifications  

• 8+ years of experience in ML engineering, including 2+ years hands-on with LLMs transformers, or generative models.
• Demonstrated track record of owning ML projects end-to-end and driving measurable business impact.
• Strong applied experience in training, fine-tuning, and deploying LLMs for real-world applications.
• Proficiency in Python and deep learning frameworks (PyTorch or TensorFlow).
• Solid foundation in modern ML, including transformers, self-supervised learning, generative modeling, multimodal methods.

  

Role & Responsibilities 

• Design and implement end-to-end LLM-driven solutions for advertising and marketing use cases (e.g., creative generation, product embeddings, recommendation, copywriting, targeting).
• Develop and fine-tune large-scale transformer-based models (pretraining, instruction tuning, RAG, multimodal).
• Build scalable pipelines for training, evaluation, and online serving of generative models.
• Run experiments to measure business impact (CTR, CVR, GMV, ROAS) and iterate quickly.
• Collaborate closely with cross-team members to integrate LLMs into production systems.
• Mentor junior engineers and establish best practices for LLM/GenAI development.

Basic Qualifications 

 

• 8+ years of experience in ML engineering, including 2+ years hands-on with LLMs transformers, or generative models.
• Demonstrated track record of owning ML projects end-to-end and driving measurable business impact.
• Strong applied experience in training, fine-tuning, and deploying LLMs for real-world applications.
• Proficiency in Python and deep learning frameworks (PyTorch or TensorFlow).
• Solid foundation in modern ML, including transformers, self-supervised learning, generative modeling, multimodal methods.
• MS or PhD in Computer Science, Machine Learning, or related fields.

 

Preferred Qualifications 

• Prior experience applying LLMs or generative AI in ads, recommendation, or creative optimization.
• Experience building distributed training pipelines and scalable inference systems.
• Familiarity with experimentation platforms and A/B testing at scale.
• Strong cross-functional communication and ability to operate independently in a distributed global org.
• Proven ability to mentor, influence, and set technical direction without formal management authority.
• Strong written and verbal communication and teamwork skills.

  

Recruitment Process and Others  

 

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 veteran’s benefits, the disabled, etc.) may receive preferential treatment for employment in accordance with applicable laws. 

 

Privacy Notice​ 

• Your personal information will be collected and managed by Coupang as stated in the Application Privacy Notice located below: https://www.coupang.jobs/privacy-policy/