Software Engineer

Software Developer, Japan Tax Technology

Location: Tokyo, hybrid

Employment: contract, individual contributor

Role

We are seeking an experienced developer to update our systems for 2026 Japanese tax calculations and migrate a legacy application to C# and .NET 8.0.

You will work directly with Japanese tax subject-matter experts to translate tax requirements into accurate, reliable system functionality.

Responsibilities

• Develop and maintain Japanese tax systems.
• Migrate legacy applications to .NET 8.0.
• Implement and test tax calculation logic.
• Support solutions using Azure, Visual Studio, and Git.
• Work with XML, PDF files, APIs, and system integrations.
• Troubleshoot issues and document technical solutions.

Requirements

• Strong professional experience with C# and .NET.
• Experience with legacy-system modernization.
• Working knowledge of Azure, Visual Studio, and Git.
• Strong analytical, testing, and debugging skills.
• Ability to communicate effectively with Japanese-speaking subject-matter experts.
• Japanese and English bilingual ability preferred.
• Tax, accounting, payroll, or other rules-based system experience is an advantage.

If you are interested in this position please share your updated resume at rajat.singh@esolglobal.com

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