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

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Jobs→COSOJI株式会社→AI Solutions Department | AI Engineer / Contract Employee

AI Solutions Department | AI Engineer / Contract EmployeeEnglish summary from Japanese

COSOJI株式会社

✓ Detailed
Salary
時給 3,500円 〜 5,000円 ※経験・スキルを考慮の上、当社規定により決定いたします。
Location
フルリモートワークフルリモート・完全在宅可 ※安定したインターネット環境のご準備をお願いいたします。 ■出社時の勤務先(東京本社) 東京都港区新橋1丁目1-13 アーバンネット内幸町ビル3F ■出社時のアクセス JR線 新橋駅 北改札(日比谷口)徒歩5分 都営地下鉄三田線 内幸町駅 A5番出口 徒歩2分 都営三田線 日比谷駅 A13番出口 徒歩8分
Job Type
Freelance, 副業, フリーランス
Work Style
・週3日〜 / 週24時間以上 から稼働可能 ※多くの稼働時間を確保いただける方を歓迎します。 ※日中に稼働・やり取りができる方大歓迎です
Apply on HERP

Role summaryEnglish summary from Japanese

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

As an AI Engineer, you will develop AI solutions using real estate management operational data to improve internal productivity (internal DX). You will be involved in client-facing development and internal tool creation, with the ratio adjustable to your preferences.

Must-haves

  • 3+ years of practical development experience using Python
  • 3+ years of experience in infrastructure construction and operation
  • Experience in system development through contract development
  • Experience in basic and detailed design
  • Experience in developing and tuning products using AI or LLM
  • Skills in creating specification documents and design documents

Nice-to-haves

  • Experience in requirement definition and QCD management as a PM
  • Experience in design leadership and code reviews as a Tech Lead
  • Experience in engineer management
  • Experience in developing large-scale projects in environments requiring high security
  • Experience in data infrastructure construction
  • Experience in front-end development
  • Experience in development using MCP
  • Experience in technical explanations and proposals to clients

Tech stack

PythonReactFastMCPNextJSMySQLDynamoDBAWSAzuleGithubNotionAsanaDify

Work style

Full remote / Fully remote work possible. Must ensure a stable internet connection. Work schedule: Available from 3 days/week or 24 hours/week. Daytime hours communication preferred.

Other notes

Hourly wage: ¥3,500 - ¥5,000. Determined based on experience, skills, and company regulations. Employment Type: Contract Employee. Probationary Period: 6 months.

About the Company

COSOJI株式会社

Headquarters
〒105-0004 東京都港区新橋1丁目1-13 アーバンネット内幸町ビル3F
Founded
2020-05
Visit Website
Posted6/17/2026
Sourceherp