Java Backend Engineer (Payments & Microservices)

Quantum Technologies. LLC; Missouri; On-site; USD 120,000 - 180,000; Full time

Job summary

Quantum Technologies. LLC in Missouri is seeking an experienced software engineer with 7–12 years in designing software solutions using Java, J2EE, PostgreSQL, and microservices.

You will work with REST and SOAP web services, Spring Boot, Spring MVC, Hibernate/JPA, API Gateway, and Azure, driving integration, migrations, and architecture. The role requires hands-on development, strong problem-solving, and ability to work independently under pressure.

Qualifications

• Must have Java/J2EE, databases (Postgres), REST/SOAP, Spring boot, Spring MVC, Hibernate/JPA, API Gateway, Azure, Microservices.

Job description

Quantum Technologies. LLC in Missouri is seeking an experienced software engineer with 7–12 years in designing software solutions using Java, J2EE, PostgreSQL, and microservices.

You will work with REST and SOAP web services, Spring Boot, Spring MVC, Hibernate/JPA, API Gateway, and Azure, driving integration, migrations, and architecture. The role requires hands-on development, strong problem-solving, and ability to work independently under pressure.