[Go/Ruby | Total Funding 7.33 Billion JPY] Transform "One Bank" with Our Proprietary Payment Infrastructure into an All-in-One Money App. Backend Engineer to Lead AI Utilization of Unique Financial Data and Infrastructure Renewal

▼Job Description ▍About SmartBank ￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣ SmartBank is a FinTech startup with the mission to "Create a future free from money worries with new common sense." As of 2026, our service "One Bank" (formerly B/43) is evolving into an "All-in-One Money App" that provides a seamless experience from "spending, borrowing, and understanding" money to "saving and growing" it, going beyond the scope of traditional household accounting and payment apps. We are developin...