Profile
Software engineer based in Tokyo, working across backend development, infrastructure, requirements
definition, specification writing, and technical leadership. Experienced with .NET, C, Flutter, Linux,
cloud environments, CI/CD, and internal business systems.
Owns source code quality, coding standards, infrastructure operations, and technical research for new
projects, with practical experience in architecture decisions, code review, debugging, infrastructure
setup, and defect prevention before release.
Experience
- Backend and application development for internal business systems.
- Requirements definition with clients and specification writing.
- Infrastructure management, cloud VM provisioning, CI/CD setup, and source control administration.
- Code review, coding standard maintenance, technical investigation, and defect prevention before release.
- Developed and deployed an internal approval system (稟議システム) used by more than 1,000 users.
- Administers Gitea and Redmine environments used by a 15-person department.
- Deployed five projects of varying size, including a 1.5-year company-wide approval system project.
- Improved manual workflows through automation, coding standards, code review, and cloud deployment practices.
Additional Experience
Keio Plaza Hotel (京王プラザホテル) - Lobby / Customer Service
- Handled customer service in Japanese, English, Spanish, and occasional Chinese.
- Used business Japanese and keigo (敬語) in a hotel environment.
- Built Excel-based workflow automation as a secondary responsibility.
Selected Projects
- git.low-level-guy.com/josufh
- Detailed project writeups will be added as selected repositories are finalized.
- Open source activity includes reporting issues to improve .NET tutorial sample code.
Technical Skills
- Primary: C#, .NET, ASP.NET, C
- Application: Dart, Flutter, HTML, JavaScript / TypeScript, Node.js
- Databases: MySQL, PostgreSQL
- Cloud: AWS, Google Cloud, Oracle Cloud, Azure
- DevOps: Gitea Actions CI/CD, Docker, Linux server administration
- Testing: xUnit
- Tools: Neovim / Vim, VS Code
- Secondary: Python
Languages
- English - professional / TOEIC 965
- Japanese - professional / JLPT N2
- Spanish - native
- Catalan - native
- Chinese - intermediate / HSK 3
- Japanese Sign Language - beginner / JSL Grade 5
Education
Business program with IT-focused coursework.
Role Interests
Interested in software engineering, architecture, project leadership, internal systems, infrastructure,
and technology research roles. Open to remote work and office-based collaboration.