Harper
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B2B AI

Field CTO ($250K–$400K + Equity)

Full-time🇯🇵 Tokyo

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About The Job
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Job Title
Field CTO (Founding, Japan)

Salary
$250K–$400K + Equity — global Top-tier cash compensation plus a next-gen founding-member stock option package

Location
Tokyo, Japan

Company Description
In just 13 months since founding, the company hit a $2B valuation and raised $286M in total funding. Its B2B customer-service AI agent platform is already deployed across enterprises in 30+ countries.

The client is opening the Japan market and looking for the first member to build it from zero. Working directly with the European HQ's C-level, you'll design and build an entire country's business from the ground up — the closest thing to founding, with the leadership mandate to match. The CTO directly solves the most critical problems facing customers and the product.

What You'll Do

  • Lead the technical side of sales: join early-stage conversations, present demos, and guide architecture and security discussions.
  • Act as hands-on engineering lead — shipping code, building integrations, and setting high quality standards.
  • Build and lead a high-performing technical team across engineering, integration, and pre-sales — laying the technical foundation of the Japan entity yourself.
  • Drive customer integrations end to end, from scoping to deployment of AI agents, ensuring production accuracy.
  • Gather customer feedback, localize the product, and represent regional needs directly to the global Product team.
  • Serve as the local technical point of contact, building partnerships and handling escalations.

Who You Are

  • 8+ years of hands-on software engineering — you've built things that actually shipped.
  • Proven track record in pre-sales, solution architecture, or complex technical implementations.
  • Customer-facing background (Field CTO, Solutions Architect, Deployed Engineer) — you speak both tech and business fluently.
  • Strong leadership DNA, ideally at Director, VP, or Founder level.
  • Excellent English, plus fluency in Japanese, to lead technical and business discussions with multinational clients.
  • Comfortable in a zero-to-one environment — building the plan, the team, and the system from scratch.
  • Bonus: you've thrived in a fast-moving startup where speed and ownership matter more than titles.

Perks & Benefits

  • Global Top-tier compensation plus a next-gen founding-member equity package.
  • Global stage: Japan-based, with regular exchange with the European global HQ and direct C-level collaboration.
  • Flexible remote work and world-class wellness benefits.
  • A rare scale-up experience: opening an entire market at the frontier of enterprise AI adoption.