AI Engineer (Typescript)English summary from Japanese

フィシルコム株式会社

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Salary

年俸制　550万円～800万円（年俸の1/12を毎月支給）みなし残業制度：なし

Location

〒101-0025　東京都千代田区神田佐久間町3-21-2 （最寄駅より徒歩5分以内）

Job Type

Full-time

Work Style

フレックスタイム制（コアタイム 11:00～15:00）標準労働時間：1日実働8時間想定年間労働時間：2,000時間

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Role summaryEnglish summary from Japanese

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

AI Engineers will design and develop AI agent functions using the TypeScript-based AI agent framework "Mastra", leveraging generative AI. You will be responsible for everything from planning to implementation and operation of practical products incorporating LLMs.

Must-haves

TypeScript/Node.js development experience
Must work onsite in Tokyo

Nice-to-haves

Web application development experience (frontend or backend)
Experience developing/using generative AI/LLMs (Mastra, LangChain, LlamaIndex)
Knowledge of RAG and prompt engineering
Experience developing with APIs and cloud services

Tech stack

TypeScriptNode.jsMastraGitDockerAWS

Work style

Hybrid (Flex-time with core hours 11:00-15:00), Onsite in Tokyo (Chiyoda-ku)

About the Company

フィシルコム株式会社

Headquarters

東京都千代田区神田佐久間町3-21-2

Founded

2020-10

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Posted7/24/2026

Updated2026/07/24 17:23

Sourceherp