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OpenAI company · OPEN ROLE

OpenAI

Applied AI Engineer, Codex | Tokyo

Tokyo · Engineering · AI

Company
Helps companies bring AI into real work and products through ChatGPT and its API.
Role
Helps developer customers in Tokyo put Codex to work in their actual jobs.
Language
Fluent Japanese and English

What you will do

We rewrote the responsibilities and qualifications in plain language instead of copying the original posting.

Responsibilities

  • Work with engineering leaders and developers to find high-value opportunities for Codex and turn them into concrete architectures, plans, and success criteria.
  • Design, build, and deploy AI-powered workflows that improve how teams plan, write, test, review, debug, and ship software.
  • Write code yourself to build prototypes, evaluation tools, integrations, and automation, often using Codex in the process.
  • Help customers move from early experiments to production workflows used at scale.
  • Design systematic ways to evaluate AI coding systems using representative tasks, automated grading, production signals, and developer feedback.
  • Make sound technical calls across models, agents, environments, reliability, security, and cost to keep systems production-ready.

What you need

  • A track record of building software or AI systems in enterprise settings, from prototype through production.
  • Real hands-on contributions to code, architecture, evaluation, debugging, or production engineering.
  • Strong Python skills and comfort working in modern development environments.
  • Fluent in both Japanese and English.

Good to have

  • A regular user of AI coding tools with a clear point of view on them.
  • Experience handling real production requirements such as tooling integration, reliability, security, data governance, performance, and cost.
  • Clear communication across developers, leaders, security teams, and executives.
  • Takes ownership and drives things through in ambiguous situations.
  • Learns fast and collaborates with humility.
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Checked 2026-10-19

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