B206. Mobile App Engineer (Tech Lead / Flutter) <Full Remote / Full Flex> [AI x Fintech with over 65 billion JPY in cumulative funding]English summary from Japanese

株式会社UPSIDER

✓ Detailed

Salary

740万円〜 1,200万円

Role summaryEnglish summary from Japanese

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

UPSIDER is seeking a Mobile App Engineer (Tech Lead) to develop iOS/Android apps for their corporate card services, "UPSIDER Card" and "PRESIDENT CARD". You will also contribute to backend features, enhancing product value from both frontend and backend perspectives in a fast-paced, quality-focused environment.

Must-haves

Experience designing and developing Android or iOS applications
Experience in team development with multiple people
Experience with Code Review
Practical experience with Agentic Coding (e.g., Claude Code, CodeX / Devin)

Nice-to-haves

Development experience with Flutter (a Flutter app creation task is part of the selection process)
Design and development capabilities considering Testability, Scalability, and Extensibility
Knowledge of Material Design / Human Interface Guidelines
Backend development experience with Go

Tech stack

FlutterGCPKubernetes

About the Company