PayPay Card Corporation, established in 2021, is revolutionizing the credit card industry by integrating with the PayPay payment platform, serving over 66 million users. As a Senior Backend Engineer, you'll be instrumental in building and rebuilding scalable services that enhance the credit card experience. The role focuses on two main angles: elevating the credit card experience through new functionalities and re-architecting systems for optimal performance. Working with Spring Boot, Java, and AWS infrastructure, you'll design and implement large-scale systems while mentoring team members. The position requires expertise in OOP, distributed computing, and database management. The company offers a flexible work environment with remote options, comprehensive benefits, and the opportunity to work in a multicultural setting. This is an excellent opportunity for experienced engineers passionate about FinTech innovation and creating impactful payment solutions in Japan.