Harper
All roles
Consumer AI

Founding Engineer, AI Agent

Full-time🇰🇷 Seoul

Talk to Harper

How to Apply

Step 1. Apply through Harper. Yes, you'll use our own product to join us.
Step 2. No formal resume needed. Just talk to Harper about what you've built and what you want next.
Step 3. Strong fits go straight to the CEO.

Job Title

Founding Engineer, AI Agent

Location

Seoul (On-site)

About Harper

Harper is an AI career agent that puts your career on autopilot. Sync your profile once, by voice or text, and Harper learns your full context, then quietly works the hidden job market for you: we search, you approve. You see only the roles worth your time (full-time, fractional, or advisory), and everything stays private until you say yes.

Harper works with frontier AI companies building their teams in Korea, including a $5B enterprise AI company and a $24B frontier AI lab. Founded in late 2025 and backed by global VCs, we're a small, fast-moving team in Seoul building the AI recruiter for the global market.

About The Role

You'll own the brain behind Harper: the agent that talks to engineers, understands their careers, and decides which engineer should meet which company. It is the reason a Forward Deployed Engineer in Seoul gets introduced to the right $5B AI company instead of reading another job board. The right person on this problem defines the product. That's you.

What You'll Do

  • Build and own Harper's AI agent core: LLM orchestration, prompting, retrieval (RAG), evals, and multi-agent flows.
  • Ship the product around it end to end: frontend, backend, and the systems that put the agent in front of users.
  • Design evaluation and feedback loops so the agent measurably gets smarter over time.
  • Work directly with the founders to define what "a great AI recruiter" actually means.

Who You Are

  • 3+ years of hands-on engineering, with real experience building LLM or agent systems in production (not just demos).
  • Strong across the stack so you can take the agent all the way to users.
  • Fluent in modern AI tooling: orchestration frameworks, RAG, evals, prompt engineering.
  • High-agency, fast, and obsessed with making the product genuinely intelligent.

Why Join (and what you'll get)

  • Own the core. You'll build the AI brain of a category-defining product, with founder-level ownership from day one.
  • See the frontier AI hiring market from the inside. You build the system that works with the companies every engineer wants to join.
  • The fastest growth of your career. Work on the hardest, most interesting AI problems with no ceiling on what you can do.
  • A front-row seat to company-building. Daily, direct work with the founders at startup speed.
  • Significant founding-team equity.
  • Seoul, on-site: high-bandwidth, in-person, move-fast culture.
  • Breakfast, lunch, dinner, and coffee, all on us.
  • Team retreats abroad. We work hard, then explore the world together (think Bali, Lisbon).