• Full-time

Publication date: 2026.05.08

.NET Developer (C#) (13773)

  • System Engineers / Infrastructure Engineers / Web Engineers / Game Developers
  • Osaka
  • Salary 8 to 10 million yen
フルスタックエンジニア【C#.Net】 (13773)
職種Position System Engineers / Infrastructure Engineers / Web Engineers / Game Developers
会社概要Company profile The company operates across four main divisions, with its core service being a proxy purchasing and delivery service that enables customers to buy Japanese products not available for purchase directly from overseas. In addition, the company runs a cross-border e-commerce platform selling Japanese goods internationally, a subscription-based service that delivers items symbolizing Japanese pop culture to customers abroad, and a one-stop service that supports Japanese businesses aiming to expand overseas — from marketing to logistics.

With the mission of spreading Japanese culture across the globe, the company is expanding its business in various directions.

[Company/Job Highlights]

Rapidly Growing Company
With over 1.7 million users worldwide, the company delivers "Made in Japan" products to more than 150 countries.
Since its founding in 2014, it has continued to break its own sales records each year, and in the previous fiscal year, it surpassed 10 billion yen in annual revenue.

Diverse Team
The company currently provides services in 19 languages.
At the Osaka headquarters, a multicultural team of members from six continents and over 30 countries, ranging in age from their 20s to 50s, work together.

Creativity and Innovation
The company is constantly embracing new ideas and technologies. Employees are encouraged to approach their work with creativity, which leads to the development of new services and business ventures.

Fast-Track Promotions
Promotions are a major motivator in the workplace. At this company, high-performing employees are rapidly promoted as both recognition of their achievements and an investment in their future potential. Some employees have been promoted to management positions within just six months of joining. Rather than focusing on tenure, the company prioritizes individual performance and assigns roles accordingly.
仕事内容Job description [Why they are hiring]
With our IT team based in Ukraine and our core operations in Japan expanding year after year, we are looking to hire an on-site .NET Developer to join our team and support our IT-related projects during core business hours.

At ZenGroup, a significant portion of our software is proprietary and custom-built, spanning critical systems like our time card system, logistics platforms, and service homepages. We are seeking a new web developer to join our existing IT team who will be responsible for refactoring existing code, adding new features to both our external service pages and internal systems, and coordinating on-the-ground requests and operations with our Ukraine-based team.

If you’re eager to take part in a new business initiative with the potential for significant growth, we want to hear from you. Apply now and contribute to the future of ZenGroup!

[Job description]
・Development and maintenance of ZenGroup’s cross-border e-commerce sites
・Integration of payment systems (credit cards, PayPal, digital wallets) via API
・Coordination with third-party logistics applications via API connection
・Acquisition and processing of database data to create visual reports (graphs, tables)
・Inventory integration with other platforms via API connection
応募資格Requirement [Personality]
・Analytical & Detail-Oriented: Candidates who write clean, efficient code in C#, with a strong focus on quality and accuracy
・Adaptable & Curious: Candidates who are open to adopting new tools and technologies, including migrating to updated frameworks. They actively research emerging technologies and make thoughtful suggestions to help the team improve development processes
・Collaborative Communicator: Candidates who are comfortable communicating in a collaborative, multilingual environment. Within a team, they can report project status, listen actively, and contribute constructively to discussions

[Requirements]
・3+ years of practical software development experience
・Proficiency in C# and .NET web development
・Strong front-end/back-end development experience with JavaScript
・Experience using MSSQL or similar databases
・Experience using Entity Framework
・Solid understanding of Object-Oriented Programming (OOP) and common design patterns

[Preferred Skills]
・Familiarity with cloud platforms such as Azure
・Contributions to open-source projects or personal side projects
・Strong interest in software architecture or leading technical discussions
日本語力Japanese level Business
雇用形態Employment type Full-time
勤務エリアLocation Osaka
勤務時間Working hours 9:15 AM – 6:15 PM (8 working hours / 1 hour break)
想定年収Salary 8 to 10 million yen
条件・待遇Condition Employment Type: Permanent
Trial period: 3 months
Days Off & Vacation Leave:
・5-day workweek (Shift Schedule)
・New Year holiday (4 days)
・Paid leave (26 days in year 1)
・Congratulatory and condolence leave
・Maternity/paternity leave
・Child care leave
・Personal day leave
*Work is required on national holidays, excluding the New Year holiday.

Benefits:
・Complete social insurance
(workers’ compensation, employment, health, welfare pension)
・Business casual dress code
・Training system (job-specific, level-specific training)
・Japanese/English lessons
・In-house club activities (karaoke, day camp, etc.)
・Monthly company events
・Free tea and coffee
選考についてProcess First interview – Hiring Team (45-60 mins, online or in-person)
*Logic test (test excluded for online Interviews)

Second interview – IT team (45-60 mins, in-person required)
*Online

Third Interview – HR Planning Team (45-60 mins, online or in-person)
*Company culture test
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