Tappx is hiring a Senior Java Backend Developer to join the Performance Tech team in our IT department. The role focuses on coding, debugging, and maintaining high-quality backend services in Java, with a hybrid/remote setup across Spain. You will work across the application lifecycle, gather requirements, and collaborate with data and product teams to deliver scalable solutions. The position offers adaptable hours and a mix of in-office and remote work in Barcelona/Madrid. #J-18808-Ljbffr