【★Backend Engineer (Go)】BtoB Fintech & Payment Infrastructure / Hybrid / JLPT N2 Level～

★Back-End Engineer [Go] / Money Platform CompanyBusiness Level Japanese Required ◆ Listed Company◆ Flextime & Hybrid Work◆ Own Products/Services◆ Global Business◆ Annual salary: 5.5 million yen - 10 million yen -------------【About the company】------------- The company was established in May 2012 to solve the money issues of individuals and companies through the services, and to make users' lives more positive and forward-thinking.Through their services, they aim to become the No. 1 "money platform" in Japan by relieving individuals of their money worries and anxieties, improving corporate management, and increasing domestic productivity. -------------【 Job Description】------------- ■About This Business UnitEstablished in March 2017, this business unit has grown into a major operation handling over ¥280 billion cumulatively. It provides a variety of financial services, including:・Post-payment and invoicing services for B2B transactions.・Early monetization services for accounts receivable.・Fundraising services for startups.・Invoicing and card payment services for businesses. The company also offers a FinTech service, a cashless platform that promotes cashless transactions through various payment methods like card and wallet payments, thereby improving back-office efficiency. A key component of this platform is a business card service for sole proprietors and corporations. The company group has historically offered a wide range of financial services aimed at solving payment and cash flow challenges for businesses. To deliver superior value at the intersection of SaaS and Fintech, they plan to consolidate the company's Fintech-related businesses into this business unit starting in March 2025. By gathering the group's highly synergistic financial businesses into this unit, they will pursue efficient business operation and enhanced governance, while also driving agile and flexible business strategies, including obtaining necessary licenses and approvals. You will be assigned to this business unit. ■Business DirectionAs long as business transactions exist, there will always be a need to address the complexity of invoicing and the demand for early access to working capital. B2B services require meticulous attention, as invoicing alone is subject to diverse rules and customs across various industries and companies. This business unit is focused on using technology to achieve visualization and efficiency in response to these needs. Furthermore, they use the business data they accumulate to create new ventures. The company focuses heavily on corporate credit and the utilization of corporate data, which directly impacts the accuracy and speed of credit decisions. As a result, the service is more than a simple invoicing agency; it manages the entire process from credit approval to settlement and merchant acquisition—effectively performing every function within the credit card industry in-house. "Settlement" is an extremely broad concept that is closely linked to the data business. The service's strength lies in its ability to take on this broad scope of settlement processes at an operational level and drive transformation. ■OverviewIn this role, you will work on the company's core B2B post-payment service business. They are looking for a Backend Engineer to lead the effort in building a service that ensures reliable transactions for client companies by continuously and rapidly enhancing its value through technology selection, architecture design, and application development. Your mission will be to use engineering to solve a wide range of challenges. This includes continuously solving the pain points of current client companies, as well as developing features that remove obstacles for potential new users considering implementation. ■ResponsibilitiesYou will be involved in the architecture design, technology selection, implementation, release, and continuous improvement of the company's B2B post-payment service, which primarily runs on Goog