Backend Software Engineer - AI Neobank App (Japan)

Build and scale the core backend systems for a mobile-first AI neobank app, including reliable APIs, workflows, and infrastructure across accounts, transactions, partner integrations, reconciliation, notifications, and operations. Partner with product and mobile teams to ship customer journeys quickly, integrate with banks, payment gateways, insurers, and data providers, and improve reliability, observability, security, and performance for regulated financial products.