Harper
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AI

Applied AI Engineer, Full-Stack ($150K–$300K + Equity)

Full-time🇰🇷 Seoul

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About The Job

The client is hiring for this role. Harper is an AI career agent that works for you, the candidate. Skip the application form: just talk to Harper, and it puts strong candidates straight in front of the client, plus other frontier roles worth your time.

Job Title

Applied AI Engineer, Full-Stack

Salary

Competitive base + Equity: top-tier comp at a world-leading AI lab

Location

Seoul (Hybrid)

Company Description

A European AI lab building open-weight, open-source frontier models that go head-to-head with the best closed labs. In September 2026 it raised a €3B Series D led by Samsung, with Nvidia participating, at a €21B (about $24B) valuation. They train the models, not wrap them. Teams across France, the US, UK, Germany, and Singapore, now building in Seoul. Low-ego, ship-fast, research-meets-production.

What You'll Do

  • Take frontier models into real enterprise software. You own the integration end to end.
  • Design and ship scalable full-stack apps where the front end and back end actually fit together.
  • Build complex customer use cases and get them running in production, not just in a demo.
  • Work shoulder to shoulder with researchers, AI engineers, and product engineers, and push their feedback back into the models.

Required Qualifications

  • 2+ years as a hands-on IC on hard technical problems.
  • Strong in Python and TypeScript.
  • Comfortable across the stack: React, Next.js, or Vue on the front, Node.js on the back.
  • You know your fundamentals (design patterns, data structures, algorithms) and when to ignore them.
  • You can explain a hard technical tradeoff to an engineer and a CTO in the same meeting.
  • Fluent in English and Korean.

Nice to Have

  • You have shipped with LLMs or GenAI.
  • Open-source contributions.
  • Experience as a Forward Deployed, Sales, or Solutions Engineer, or a Technical PM.

Why Join

  • Build on open-weight frontier models, the ones people actually fine-tune and self-host.
  • Bring frontier AI to Korean enterprises from the front line.
  • Work directly with a global team across France, the US, UK, Germany, and Singapore.
  • Low-ego, ship-fast culture. Competitive comp + equity.