Harper
All roles
B2B AI

Full-Stack Engineer, AI Agents

Full-timeMid-Senior (3+ years)🇰🇷 Seoul

The full-stack version of the FDE role. You build the product surface the customer lives in and the backend that connects it to the model.

Talk to Harper

Company Description

A global AI company that has raised over $800M and reached a $5B valuation in under two years, opening its Korea office after New York, London, Singapore and Tokyo. The product is an enterprise AI operating system: agents that run inside a company's actual operations rather than sitting beside them.

You do not need an AI title on your profile. There are far more engineers in Korea who can ship a real product on top of a model than there are people whose resume says so, and this team needs the first kind.

This role is live and confirmed with the company that is hiring. Harper never posts a fake or placeholder job.

What You'll Do

Forward Deployed Engineering is not traditional product engineering. You sit with the customer, learn how their operations actually run, and build the systems that make AI work inside them. On this track you own it front to back, not up to an API boundary.

  • Embed with enterprise customers to understand their workflows, constraints, and what success actually means to them.
  • Build the surface they live in: the agent UI, the console, the workflow.
  • Write the backend that connects it to the model, their data, and their existing tools.
  • Own deployments from prototype through launch, monitoring, and continuous improvement.
  • Own reliability for what you ship: latency, failure modes, and what happens when the model is wrong.
  • Feed what you learn in the field back to the product and engineering teams.

Required Qualifications

  • 3+ years building and shipping production software that real users depend on.
  • Strong TypeScript and React, or equivalent modern front-end work.
  • Backend competence in Python or Node, including designing and consuming APIs.
  • You have owned a feature from empty file to live users, not just a slice of one.
  • You want to be in front of customers. This is customer-facing engineering, not a pure backend or infrastructure role.
  • Business-level Korean and English. You will work with the global team directly, with no layer in between.

Nice to Have

  • Hands-on work with LLMs, RAG, or agent systems, including side projects.
  • Product sense: you argue about what to build, not only how.
  • A forward-deployed, solutions engineering, or technical consulting background.
  • Design fluency, or a track record of shipping interfaces people find obvious.
  • Cloud fluency (AWS, GCP, or Azure).

Why This Role Is Remarkable

  • AI product work in Korea is mostly demos right now. These deployments run inside paying enterprise customers.
  • You will be one of very few engineers in the market with production agent product experience, and that gap is not closing quickly.
  • The Korea team is early. What you ship in the first year becomes how the product looks here.

How Harper Works

  • Sign up and talk to Harper.

    Tell Harper about the work you've done and the kind of environment you'd like to work in next.

  • Show interest in a role you like.

    Harper will review the role and assess how well it fits you, using information the company has shared privately with Harper.

  • Harper connects you with the company.

    If it looks like a good fit, Harper may recommend you to the company first or ask whether you'd like to move forward with the role, depending on your settings. If you say yes, Harper helps make the connection right away.

  • Keep the door open while you work.

    Harper keeps looking for opportunities that match what you want and suggests new connections. You don't have to be actively job searching. You can consider each company's proposal before deciding whether to move forward, and Harper will help you through the process.

    • FAQ

    Are these real job opportunities?

    Yes. These are roles companies have asked Harper to help with, and Harper is in direct contact with them.

    Am I applying directly here?

    No. Harper uses information the company has shared privately to assess how well the role fits you. If it looks like a good fit, Harper may recommend you to the company first or ask whether you'd like to move forward with the role first. If you accept, Harper helps make the connection right away. For now, tell Harper which role interests you. Harper will review it first and prepare what it needs to introduce you well.

    How is this different from applying directly to the company?

    You're more likely to reach a meeting, and Harper helps you through the process.

    Will my information be shared with the company?

    You can choose between two approaches. With Exceptional only, Harper shows you a strong opportunity first and shares your profile with the company only after you accept and allow profile sharing. With Open to matches, Harper may introduce your profile to a company first when there's a strong fit. This can lead to more opportunities, and you can review the company's proposal before deciding whether to move forward.

    What if I'm not looking to move right now?

    That's fine. Tell Harper you're not planning a move right now. You can look at a proposal you like and decide then.

    What happens after I accept a role?

    Harper prepares your profile and relevant experience for an introduction to the company and helps make the connection. Your profile is shared according to your settings and consent, and Harper keeps you updated by email.

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