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Browse thousands of tech jobs at Japanese startups and companies. Translated for foreign engineers.

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Jobs→株式会社GenerativeX→Staff Software Engineer

Staff Software EngineerEnglish summary from Japanese

株式会社GenerativeX

✓ Detailed
Salary
1,800〜3,000万円(経験・スキルに応じ決定)
Location
東京都千代田区丸の内2丁目4−1 丸の内ビルディング 27F
Job Type
Full-time
Work Style
専門業務型裁量労働制 基本就業時間は 9:00〜18:00(休憩1時間)
Apply on HERP

Role summaryEnglish summary from Japanese

English summary for screening — check the original posting before applying.

GenerativeX is seeking a Staff Software Engineer to define and uphold the highest technical standards, making critical architectural decisions across products and client solutions. You will lead efforts to resolve technical debt, evolve architecture, and improve developer experience, impacting business outcomes through technical dialogue with management and client CxOs.

Must-haves

  • 8+ years of experience in designing/developing web applications or business systems using TypeScript, Python, Rust, etc.
  • Proven track record of leading cross-organizational architecture design/redesign.
  • Deep knowledge of designing/implementing non-functional requirements (RBAC, job management, auditing, scaling, security).
  • Experience in independently driving infrastructure design to cost optimization in cloud environments (Azure / AWS).
  • Ability to communicate and reach consensus on technical matters with management and client CxO-level executives.
  • Experience in leading the writing and review of design documents and ADRs.
  • Must work onsite in Tokyo and wear a suit.

Nice-to-haves

  • Experience in architecture design and production operation of systems utilizing LLM / Generative AI.

About the Company

株式会社GenerativeX

Headquarters
東京都千代田区丸の内2丁目4−1 丸の内ビルディング 27F
Founded
2023-06
Visit Website
Posted2/12/2026
Sourceherp
  • Practical experience in AI agent accuracy evaluation, hallucination countermeasures, and guardrail design.
  • Experience in system development in highly regulated industries (finance, pharmaceuticals, manufacturing).
  • Experience in designing and implementing multi-tenant SaaS.
  • Experience in designing and operating Kubernetes / IaC / CI/CD pipelines.
  • Experience in deployment and operation in on-premises or network-isolated environments.
  • Experience in leading technical organization management, recruitment, and development.
  • Ability to communicate technical information in English.
  • Tech stack

    BunTypeScriptHonoOpenAPIZodPrismaMySQLNext.jsReact 19Vercel AI SDKClaudeOpenAIAzure OpenAIAnthropic Claude Agent SDKOpenAI Agent SDKMCPAzure Container AppsAWSDockerKubernetesBullMQRedisOpenTelemetryVitestPlaywrightGitHubSlackNotionBiome

    Work style

    Onsite in Tokyo (Marunouchi Building 27F, 2-4-1 Marunouchi, Chiyoda-ku, Tokyo). Discretionary labor system for specialized duties. Standard working hours: 9:00 - 18:00.

    Other notes

    Salary: 18,000,000 - 30,000,000 JPY (Determined based on experience and skills). Full-time employee. Probationary Period: 3 months.