Senior Staff / Staff Machine Learning Engineer

We are looking for engineers who want to work on cutting edge technology, that is the intersection of Semantic knowledge bases, AI agents, NLP, LLM, AIGC, ML and software engineering. Come join us to help create a world class team advancing the AI/NLP/AIGC/ML/LLM/RL/Knowledge Graph technologies. What You Will Do Work on GenAI, AI agents' systems to solve complex eCommerce scenarios. Develop large language and vision understanding/generation models for predictive and compound AI Models Train foundational models that can help with building learning systems. Define process and experiments for an E2E foundation model. Build E2E AI pipelines for storing/servicing foundational models. Mentor and guide team members on frameworks, methodologies related to data lakes, data normalization, dimension reduction, visualization, statistical models. Ensure Model training is security, compliance aware. Collaborate with cross-team members to understand the requirements ensuring the foundational models; knowledge captured aligns with the company’s overall AI strategy. Basic Qualifications 5+ years of d emonstrated data science, experience in building large scale foundational models for eCommerce scenarios. Expertise in large language model post-training and deployment. Deep understanding of AI/LLM /AIGC /ML architecture. Strong statistical/mathematical background in defining metrics, learning functions, and result analysis. Significant experience in SQL, Python, P ySpark , Scala and R Proficiency in P yTorch / TensorFlow, Spark, BigQuery Proficiency in AI coding Cursor/Windsurf/Claude Code/Codex. Experience creating complex data visualization tools, frameworks, and techniques. Experience in dimension reduction in big data. Proficient in cloud analytical stacks [ Lakes, warehouse, ETL pipelines] Experience with inference platforms in AWS, Azure, and other open-source platforms. Result-oriented, with a bias towards customer obsession, flexibility, and impact. Strong written and verbal communication and teamwork skills Passion for Large language models, NLP, and Machine Learning at scale Education: B.S, M.S in Computer science or Mathematics, or related field 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 role is open to Singapore Citizens and Permanent Residents only 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. Job titles and responsibilities may be subject to change depending on the candidate’s overall experience, etc. This will be communicated to the candidate at the appropriate time before the offer. Hiring may be restricted in case the legal qualifications required for hiring and work performance is not met. Privacy Notice Your personal information will be collected and managed by Coupang as stated in the Application Privacy Notice located below. https://privacy.coupang.com/en/land/jobs/