PitchMeAI Jobs
Coupang

Principal Engineer, ML

Coupang · Seattle, USA

Posted 13 days ago

or apply directly on Coupang's site. We never take the application ourselves.

Is this posting real?

This role has been open
13 days
Coupang's roles stay open a median of 45 days
Reposted
No
Salary listed
No
1% of Coupang's roles list one
Ghost-job risk at Coupang
high
365 stale, 14 reposted of 717 open
Hiring momentum
1065 roles opened in the last 90 days
↑ up vs. the prior 90 days
Last confirmed on the employer's board
2026-09-17

Measured from postings appearing on and disappearing from Coupang's own greenhouse board since 2026-08-03. Full hiring picture for Coupang.

About this role

As a Principal Engineer for Coupang's Ads Serving & ML Platform, you will define and lead the technical vision for a critical business system that leverages large-scale machine learning and AI to enhance advertising effectiveness. Your role involves owning the architecture and strategy for the ads serving ecosystem, driving modernization efforts, and collaborating with cross-functional teams to solve complex challenges in distributed systems and AI-powered advertising.

Our read on this posting3.8out of 5
benefits
5/5
freshness
4/5
career value
5/5
role clarity
5/5
pay transparency
0/5

Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of Coupang as an employer.

What you need

  • 12+ years of experience building large-scale software platforms, machine learning systems, or distributed infrastructure
  • Proven track record of architecting and operating mission-critical, high-throughput online systems at internet scale
  • Deep expertise in one or more user-facing machine learning domains, including advertising, search, recommendations, or personalization
  • Strong understanding of modern machine learning systems, including model training, feature engineering, experimentation, online inference, evaluation, and production operations
  • Experience building and scaling AI/ML serving infrastructure, including optimization of GPU- and CPU-based systems for latency, throughput, and cost efficiency
  • Strong understanding of large language models (LLMs), foundation models, retrieval-augmented generation (RAG), and production AI serving architectures

Nice to have

  • Experience building large-scale advertising platforms, ad ranking systems, auction systems, or sponsored search products
  • Experience in e-commerce, marketplaces, or consumer internet companies operating at significant scale
  • Expertise in real-time machine learning, recommendation systems, search infrastructure, or large-scale personalization platforms
  • Proven contributions to architectural transformations or platform modernization initiatives across large organizations
  • Strong passion for exploring emerging technologies and translating innovation into business value

What you get

  • 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

Worth weighing

  • No specific mention of remote work options
  • Role heavily focused on technical leadership with less emphasis on team management or direct reports
  • High level of responsibility may lead to significant pressure and expectations

Summarised from Coupang's posting. Read the full original.

Listed by Coupang on their greenhouse job board, last confirmed open on 2026-09-17. PitchMeAI is not the employer.

More roles at Coupang

All 717 open roles at Coupang →

Apply to a Principal Engineer, ML position at Coupang - Jobs near me at Seattle, USA