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Jobs→HapInS株式会社→Development Engineer | Acquire Skills Needed in the AI Era | AI-Driven Development | AI-Native Engineer | 80% Flat Rate of Return | Full Price Disclosure in 2026

Development Engineer | Acquire Skills Needed in the AI Era | AI-Driven Development | AI-Native Engineer | 80% Flat Rate of Return | Full Price Disclosure in 2026English summary from Japanese

HapInS株式会社

✓ Detailed
Salary
500-1200万円
Location
首都圏(東京・埼玉・千葉・神奈川)を中心としたプロジェクト先 ご希望を考慮して勤務地・案件を決定します。 ・リモート案件あり(フルリモート50%/ハイブリッド30%/フル出勤20%) ・希望の勤務地を考慮します
Job Type
Full-time
Work Style
想定勤務時間 9:00~18:00 (内休憩1時間) ・勤務時間や労働時間はプロジェクト先により異なります。 ・勤務時間は自社とプロジェクト先で分けて管理し、1分単位でしっかりカウントします。 ・業務後の面談も残業時間としてしっかりカウントします。 ・帰社日はありません
Apply on LEVTECH

Role summaryEnglish summary from Japanese

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

HapInS is seeking Development Engineers to work on modern development projects, including AI agent features and app development. They focus on providing fulfilling careers where individual satisfaction leads to a happy future, moving away from traditional SES (System Engineering Services) limitations.

Must-haves

  • Experience in modern development (e.g., React, TypeScript, Go)
  • Willingness to be assigned to projects based on career aspirations and technical fit
  • Must be able to participate in team projects (aiming for 70% team participation within 3 years)

Nice-to-haves

  • Experience with AI agent development (LLM integration, prompt design)
  • Experience with SPA/PWA
  • Experience with AWS

Tech stack

ReactTypeScriptGoAILLMSPAPWAAWS

Work style

50% full remote, 30% hybrid, 20% full onsite. Full two-day weekends.

Other notes

80% flat rate of return (uniform for all). Full disclosure of contract documents, order prices, evaluation prices, labor costs, and profits starting July 2026. Average salary increase of 1.5x (1.5 million JPY) compared to previous job. Average unit price growth of +30,000 JPY/year. Support for latest PC (up to 200,000 JPY), environment setup (up to 50,000 JPY), books/materials/cloud/AI verification environment, seminar participation fees. Housing support system. Internal side business system. Paid Claude Pro accounts for interested engineers starting July 2026 (with training).

About the Company

HapInS株式会社

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Posted7/1/2026
Updated2026-07-16 16:02:06
Sourcelevtech