PayPay Card is seeking backend engineers to build and rebuild robust services with a focus on scalability and maintainability. The company aims to revolutionize the credit card industry by enhancing the credit card experience and re-architecting their systems landscape. As a fast-paced company leading the payments industry, they need versatile and enthusiastic engineers to take on new challenges. The role involves supporting the design, implementation, and delivery of large-scale, complex systems, understanding how to leverage infrastructure to solve large-scale problems, contributing to the team by sharing knowledge and participating in code reviews, troubleshooting product issues, and adopting problem-solving as a way of life. The tech stack includes Spring Boot, Java, AWS services, and various development tools. The ideal candidate should have experience with Spring Boot, databases, strong fundamentals in data structures and algorithms, and an understanding of concurrency and distributed computing. The position offers flexible working conditions, competitive salary, and benefits.