Senior Backend Engineer (Chatwork) <Flex / Hybrid work OK>English summary from Japanese

株式会社kubell

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Salary

応相談

Location

〒105-0001　東京都港区虎ノ門一丁目10番5号 KDX虎ノ門一丁目ビル WeWork KDX 虎ノ門１丁目 ※変更の範囲：会社（出向先の会社を含む）の定める場所 ※プロダクト職種は月1出社となります。　出社日は、配属先の本部のルールによって異なります。

Job Type

Full-time

Work Style

契約期間：期間の定めなし（試用期間3ヶ月）勤務時間：フレックスタイム制（メインタイム※ 10:00-16:00） ※業務遂行の推奨時間帯

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Role summaryEnglish summary from Japanese

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

We are seeking a Senior Backend Engineer to join the Chatwork team. You will be responsible for the development and operation of Chatwork, a business chat tool handling large volumes of traffic with low latency and high reliability. This role involves feature development, stable operation of large-scale systems, and addressing technical debt.

Must-haves

Experience integrating AI into editors/IDEs for code completion and generation
Understanding of generative AI and prompt improvement
Team lead or technical lead experience
Communication skills to collaborate with stakeholders, team members, and related departments
Web service development experience
Knowledge of object-oriented development and software testing
Experience in functional additions and improvements while addressing technical debt in existing services
Experience utilizing AI agents in development and prompt knowledge

Nice-to-haves

Experience in splitting monolithic applications
Experience designing, developing, and operating distributed systems like microservices

About the Company

株式会社kubell

Headquarters

〒105-0001 東京都港区虎ノ門一丁目10番5号 KDX虎ノ門一丁目ビル WeWork KDX 虎ノ門１丁目

Founded

2004-11

Visit Website

Posted7/28/2026

Updated2026/07/28 15:25

Sourceherp

Senior Backend Engineer (Chatwork) <Flex / Hybrid work OK>English summary from Japanese

Role summaryEnglish summary from Japanese

Must-haves

Nice-to-haves

About the Company

Tech stack

Work style

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