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Job ID : 1605062 Date Updated : July 28th, 2026
SaaS AI Startup

【No Japanese Required】C# Backend Engineer (Front:Typescript)

Location Tokyo - 23 Wards, Minato-ku
Job Type Permanent Full-time
Salary 6 million yen ~ 15 million yen

Work Style

Flex Time

Job Description

【 Flex working hours 】【 Hybrid working style】

Feel free to contact us if you are not sure if you'd be a good fit for this role or not. Ideal for someone with a strong Academic background!

Seeking an experienced Web Application Engineer for a SaaS company aiming to transform the industry by serving markets both in Japan and globally. This fast growing start-up has already secured multiple major clients and continues to expand its operations.This hiring is to support their expanding operation as well as prepare them for global expansion. The ideal applicants are those who share our vision of using technology to drive transformation in sectors that make a significant social impact, such as decarbonization and renewable energy.

 

RESPONSIBILITIES:

The successful applicant will be responsible for the end-to-end design, development, and operation of this company’s original SaaS service, and its related new services. Main responsibilities are as listed below, but please keep in mind that the scope of responsibilities will be determined based on the successful applicant’s experience and career interests.

  • Requirement definition, design, implementation, testing, and release of new features
  • Improvement of existing features, performance tuning, and addressing technical debt
  • Architectural design improvements focusing on scalability and reliability
  • Building, operating, and optimizing cloud infrastructure (Microsoft Azure)
  • Improving development processes, promoting automation, providing technical support to team members, and conducting code reviews

 

【Technology】

  • Backend: C#, FW: ASP.net Core   | Frontend: Typescript, FW: React 
  • Infrastructure: Azure, DB: SQL

 

 

General Requirements

Minimum Experience Level Over 3 years
Career Level Mid Career
Minimum English Level Business Level
Minimum Japanese Level None
Minimum Education Level Bachelor's Degree
Visa Status Permission to work in Japan required

Required Skills

[Requirements]

  • Degree in Computer Science, Information Science, Engineering, Physics, Mathematics, or a related field.
  • Solid Web application development experience, using C#, .NET
  • Solid Database design and implementation experience using Entity Framework Core or similar technologies.
  • Development experience and automated test implementation experience within cloud environments, such as Azure

[Nice-to-Have]

  • Experience building Azure infrastructure and utilizing Azure DevOps
  • Understanding of design principles such as DDD, Clean Architecture, and CQRS
  • Experience with frontend development (e.g., React) 
  • Japanese language proficiency

[Benefits/ Other]

  • Social Insurance coverage
  • Commuting allowance
  • Periodic health checkups and influenza vaccination subsidies
  • Paid leave; pre- and post-natal, childcare, and nursing care leave
  • Book purchase subsidy
  • Company-leased housing program

Job Location

  • Tokyo - 23 Wards, Minato-ku

Work Conditions

Job Type Permanent Full-time
Salary 6 million yen ~ 15 million yen
Work Hours フレックスタイム制(コアタイムなし、標準労働時間8時間)
Holidays 土日祝日・Sat/Sun/Holidays、年末年始・Year-end and New Year holidays
Industry IT Consulting

Job Category

Company Details

Company Type Small/Medium Company (300 employees or less)
Non-Japanese Ratio Majority Japanese