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2 jobs
4 hours ago
Windowsエンジニア／システムエンジニア（パッケージソフト・ミドルウェア）
New APACFull-time
Japan
港区, 東京都Windows engineer/system engineer at OPTIM, a TSE Prime-listed AI/IoT company: develop and maintain Windows applications and agents in C++/C# with Win32API, analyze OS behavior to troubleshoot issues, and coordinate technical requirements across departments. Hybrid work from Tokyo HQ (3+ office days, up to 2 remote days).
AI Claude Code C++ C# Ruby
4.5M – 7M JPY 4 hours ago
バックエンドエンジニア／システムエンジニア（アプリ設計／WEB・オープン・モバイル系）
New APACFull-time
Japan
港区, 東京都Backend/system engineer at TSE Prime-listed OPTiM developing its MDM product 'OPTiM Biz': new features, requirements definition and basic design, adapting to Google/Apple spec changes, refactoring, and multi-platform testing (iOS/Android/Windows/Mac). Starts on Windows C/C++, expanding to other platforms. Hybrid: 3 office days + up to 2 remote days weekly.
AI Android C++ C# iOS +2 skills
5.7M – 7.5M JPY