Join Japan's largest internet services provider as a (Haken) Application Engineer and work on cutting-edge web, cloud, and database projects. You will develop and maintain scalable web applications using C# or Java, design and optimize cloud-based solutions, and contribute to large-scale digital platforms that impact millions of users across Japan.
Key Responsibilities
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Develop and maintain scalable web applications using C# or Java
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Design, implement, and optimize solutions on public cloud platforms such as Azure
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Build, maintain, and tune relational databases (MSSQL/MySQL)
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Collaborate with cross-functional teams to deliver high-quality systems
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Ensure performance, security, and compliance in all development activities
Required Skills and Qualifications
Experience:
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3+ years' experience in web application development with C# or Java
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3+ years' hands-on experience with Azure or equivalent public cloud platforms
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Strong knowledge of relational database design and operations (MSSQL/MySQL)
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Experience with version control, CI/CD, and agile development processes
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Fluent communication in English and Japanese for team collaboration
Soft Skills:
Language Requirements
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Japanese: Business level
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English: Business level
Preferred Skills & Qualifications
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Familiarity with microservices architecture and container technologies (Docker/Kubernetes)
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Experience with automated testing frameworks and performance optimization
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Knowledge of cloud security best practices
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Exposure to front-end frameworks (Angular, React, Vue.js)
Why You'll Love Working Here
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Opportunity to work on large-scale, high-impact web and cloud applications
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Exposure to advanced technologies such as Azure, C#/Java, and relational databases
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Collaborative, international workplace culture with clear career growth paths
About the Company
As Japan's largest internet services provider, this company drives innovation across eCommerce, fintech, and digital platforms, providing engineers with the opportunity to impact millions of users daily. With projects in cloud computing, web applications, and databases, it offers a dynamic, collaborative environment where technical expertise meets real-world scale. Employees gain exposure to advanced technologies, professional growth opportunities, and the stability of a global brand, making it one of the most attractive employers in Japan's IT landscape.
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