Salary: Open
Employment Type: Permanent
Languages: English > Fluent
Industry: Technology/Online
Function: Technology

Company Overview

Are you interested in building the next generation of internet services that reach hundreds of millions of users across the globe every day?
Our Group is on a mission to empower individuals and society through innovation and entrepreneurship.

Today we have 70+ businesses in 29 countries across a range of sectors, with a key part of this being our presence in FinTech and Payments.
Our global solutions enable end-users and merchants to quickly and safely make and accept payments.
Not only that, but we strive to delight our end-users by bringing them the full benefits of our group membership in our Payment offerings, for example by leveraging our famous service.

Job Description

・Develop RESTful/gRPC API services that process support thousands of requests per second
・Work with QA team to build performance and integration testing tools for these APIs
・Collaborate with product managers to ensure that implementation meets the specifications


・Experienced in at least a couple of the following languages:
Kotlin, F#, C#, C, C++, Java, golang, TypeScript, JavaScript, Python, Elm
・Work experience in various frameworks on a backend service that served multiple hundreds of requests per second
・Familiarity with OAuth 2, data protection, and OWASP threat models
・Excellent understanding of architecture patterns and the SOLID principles
・Ability to contribute actively to technical discussions

Fluent English

Additional Information

Location is in Shinagawa, Tokyo

Probation Period: YES
Smoking Conditions: NA
Overtime: NA
Social Insurance: YES
Holidays: YES
Working Hours: 8:00 AM - 5:00 PM
Lunch Break: 12:00 PM - 1:00 PM
Benefits: with Employee Benefits
Job reference: JO-220421-283584

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