Senior Staff ll, AI Engineer (L7-2) at Coupang · Lumi · Lumi

Qualification

Experience in high-trafficExposure/experience in ecommerce search

3 years of experience in software engineering, with solid coding skills and critical code review capabilities, as well as a deep specialization in leveraging Large Language Models (LLMs) and Generative AI systems and productivity tools.
Strong product-led engineering mindset with the ability to bridge the gap between cutting-edge AI research and practical, user-centric product features.
Proven experience owning end-to-end AI applications, including:
Generative AI agents and conversational interfaces.
RAG (Retrieval-Augmented Generation) pipelines.
LLM fine-tuning and optimization for specific domains.
AI-powered automation and workflow systems.
Demonstrated track record of taking AI-first products from concept to production, driving measurable improvements in user engagement, operational efficiency, or system performance.
Deep technical understanding of modern AI stacks, including:
Prompt engineering and LLM orchestration frameworks (e.g., LangChain, LlamaIndex).
Vector databases and semantic search architectures.
Scalable MLOps for non-deterministic AI models.

Experience in high-traffic, large-scale consumer AI environments (e.g., LLM-based assistants, search/recommendation systems, or generative content platforms)
Experience leading or contributing to cross-functional AI research and product engineering teams.
Experience building and launching 0→1 Generative AI products or integrating LLMs into existing complex product surfaces.
Strong background in fast-scaling technology companies with a deep understanding of the challenges in deploying non-deterministic systems at scale.
Passion for continuous experimentation and rapid prototyping to solve ambiguous customer problems using the latest advancements in AI/ML.
Exposure/experience in ecommerce search.
Our compensation reflects the cost of labor across several US geographic markets. At Coupang, your base pay is one part of your total compensation.
The base pay for this position ranges from $171,000/year in our lowest geographic market to $351,000/year in our highest geographic market. Pay is based on several factors including market location and may vary depending on job-related knowledge, skills, and experience.

Senior Staff ll, AI Engineer (L7-2)