Senior Staff / Staff Machine Learning Engineer

Coupang; Singapore; On-site; SGD 140,000 - 200,000; Full time

Job summary

Coupang is seeking a senior AI/ML Engineer in Singapore to advance the AI/NLP/LLM/ML stack for eCommerce. You will build and refine large-scale models, develop AI pipelines, and collaborate across teams to implement security-conscious, scalable solutions.

The role emphasizes practical deployment of foundation models, experimentation, and mentorship within a fast-paced, global tech environment. Ownership of projects and hands-on coding are encouraged.

Qualifications

• 5+ years in data science and foundational model building for eCommerce.
• Expertise in post-training and deployment of LLMs.
• Deep understanding of AI/LLM/AIGC/ML architectures.
• Strong statistical background and metric definition.
• Experience with SQL, Python, PySpark, Scala, and R.
• Proficiency in PyTorch/TensorFlow, Spark, BigQuery.
• Experience with inference platforms in AWS, Azure, and other open-source platforms.
• Excellent communication and teamwork.
• Passion for NLP/ML at scale.
• Bachelor's or Master's in CS or Mathematics.

Responsibilities

• Work on GenAI and AI agents to solve eCommerce scenarios.
• Develop language and vision models for predictive AI.
• Train foundational models for learning systems.
• Define experiments for end-to-end foundation models.
• Build end-to-end AI pipelines for model servicing.
• Mentor team on data lakes, normalization, visualization, and statistics.
• Ensure model training is security and compliance aware.
• Collaborate with cross-team to align with AI strategy.

Skills

Large language models

Data science

Python

SQL

PySpark

Scala

R

PyTorch

TensorFlow

Spark

BigQuery

AWS

Azure

NLP/ML at scale

Communication & teamwork

Education

B.S./M.S. in Computer Science or Mathematics

Tools

PyTorch

TensorFlow

Spark

BigQuery

AWS

Azure

Job description

We exist to wow our customers. We know we’re doing the right thing when we hear our customers say, “How did I ever live without Coupang?” Born out of an obsession to make shopping, eating, and living easier than ever, we are collectively disrupting the multi-billion-dollar commerce industry from the ground up and establishing an unparalleled reputation for being leading 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 what’s possible to solve problems and break traditional tradeoffs.

Role Overview

At Coupang, we invest in providing the best product experience for our customers. The AI and Knowledge Engineering team’s mission is to provide the best possible technical solution to achieve the optimal experience for our customers. We innovate and advance the space of Knowledge Graphs, AI agents, LLMs, AIGC, ML, NLP, CV and multi-modal models.

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 demonstrated 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, PySpark, Scala and R
• Proficiency in PyTorch/TensorFlow, Spark, BigQuery
• Proficiency in AI coding Cursor/Windsurf/Claude Code/Codex.
• Experience creating complex data visualization tools, frameworks, and techniques.
• 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 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/