【Senior Fullstack Engineer(Python)】AI SaaS | JLPT N2～ | Hybrid

★Server Side Engineer [Manager / Member]｜Featured Blockchain Company

• Business Level Japanese Required (N2 Level)

★FLEXTIME SYSTEM

◆Annual Salary： 6.5 million ～ 11 million yen.

◆Great Welfare

-------------【About the company】-------------

Global virtual currency aims to become a blockchain platform

A comprehensive platform that includes virtual currency exchanges, exchanges, and peripheral services, and is still young, established in January 2014, but has raised approximately 4 billion yen in funding and has over 2 million users. The company is the only exchange in the world with licenses in Japan, the U.S., and Europe (*According to our research).

In addition, the company is responsible for the planning, design, development, and operation management of services using blockchain technology, as well as the planning, design, development, and operation management of web services and applications.

In the future, the Group will continue to unite to create innovation in the FinTech area, aiming to provide the world's leading services and technologies for both virtual currency and blockchain.

-------------【 Job Description】-------------

【Background of Recruitment】

The company seeks a backend developer to join one of Japan's leading cryptocurrency exchanges. The mission is to deliver the highest quality products to customers, and the company is looking for individuals who can approach daily development with a strong sense of ownership. Join the team in its challenge to make the world simpler through blockchain, while striking the perfect balance between development speed and system reliability.

【Responsibilities】

■ General Backend Development for the Cryptocurrency Exchange

- Development of back-office functions, including form generation and reporting features.

- Design and implementation of web applications and APIs using C# / ASP.NET.

- Software architecture design and technology selection.

- Team development through knowledge sharing and technical leadership.

- Technical contribution to new product development.

*Scope of change: Potential reassignment to all business operations.

-------------【 Requirements】-------------

【Required】

■Basic knowledge of data structures and algorithms

■Programming knowledge related to parallel and asynchronous processing

【Preferred】

■3+ years of development experience with the .NET Framework and ASP.NET (C#)

■5+ years of system development experience

■Experience developing Web APIs

■Experience developing financial systems

■Experience developing large-scale services (ability to design systems that account for load)

■Experience leading a development team

【Ideal Applicants】

■A Group of Responsible Professionals

The company manages over 1.4 trillion yen in customer assets across three hubs—Japan, the US, and the EU—supporting their daily transactions (as of October 2025). Developing systems that require high reliability within such a volatile market is a challenging, responsible, and rewarding task.

The company strives to be a professional collective that fulfills this heavy responsibility. Let’s work together to shape the future of finance.

・A commitment to maintaining strict compliance.

・Strong resonance with the company’s mission and values.

・Individuals who are enthusiastic and possess high integrity.

・The ability to respond flexibly to change with a sense of speed.

・Capacity for logical communication.

・Strong skills in problem identification, problem-solving, and execution.

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【Working Time 】

10：00～19：00

*Flextime system

【 Welfare 】

・Full social insurance (health insurance, employees' pension insurance, unemployment insurance, and workers' compensation insurance)

・Short-distance housing allowance (up to 50,000 yen per month, according to our regulations)

・Incentives for short-distance housing (100,000 yen in accordance with our regulations)

・Subsidy for purchasing books (company expense)

・Medical checkup (company expense)

・Free drinks, free snacks, free noodles

・Subsidy for meal

・Subsidy for move expenses when you join the company (paid according to company regulations)

※It may vary depending on your employment status.

【 Holiday 】

• 2 days a week (Saturday and Sunday)
• Holidays
• Parental Leave
• Congratulations & Condolence Leave
• New Year holiday
• Paid leave, etc

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