Senior Java Backend Lead - Spring Boot & Microservices

Quantum Technologies LLC seeks a Lead Java Backend Developer (Contractor) in New York. The role focuses on hands-on technical leadership, building scalable microservices with Spring Boot and ensuring high performance for applications processing millions of transactions daily. Required are 12–16 years of Java backend experience, expertise in Spring Boot, RESTful APIs, JUnit, and CI/CD. Strong problem-solving and leadership skills are essential.