Senior Java Developer - Microservices, Spring, TDD Expert

Santander is seeking a Senior Java Developer (ION) to join our Madison, NJ team. You will contribute across multiple complex applications, lead architectural decisions, and drive performance improvements in a highly available environment. The role requires 9+ years of Java backend experience, proficiency with Spring Boot/JPA/REST, CI/CD (Jenkins), and strong SQL skills. Financial services background and cloud familiarity are highly valued.