Senior Java Backend Engineer - Spring Boot & Microservices

Quantum Technologies. LLC; Madison (WI); On-site; USD 110,000 - 150,000; Full time

Benefits offered by this job

Restaurant

Job summary

Quantum Technologies LLC in Madison, WI seeks an experienced Senior Java Developer with 7–8 years of hands-on experience to design, develop, and maintain scalable enterprise applications using Java, Spring Boot, and microservices. You will build RESTful APIs, integrate Hibernate/JPA, work with SQL databases, and implement security with Spring Security and OAuth2.

The role involves AWS cloud services, CI/CD pipelines, and collaborating with frontend, QA, DevOps, and business stakeholders in an

Qualifications

• 7–8 years of professional Java development experience.
• Strong knowledge of Core Java, OOP, Collections, Multithreading, and Exception Handling.
• Hands-on experience with Java 8/11/17.
• Strong experience with Spring Boot, Spring MVC, and Spring Framework.
• Expertise in Microservices architecture and REST API development.
• Experience with Hibernate, JPA, and JDBC.
• Strong SQL knowledge with Oracle, PostgreSQL, or MySQL.
• Experience with Kafka or RabbitMQ.
• Knowledge of AWS services such as EC2, S3, Lambda, and RDS.
• Experience with Git, Maven/Gradle, Jenkins, and CI/CD pipelines.
• Unit testing using JUnit and Mockito.
• Familiarity with Docker and Kubernetes.

Responsibilities

• Design, develop, and maintain enterprise-level applications using Java and Spring Boot.
• Build scalable microservices and RESTful APIs.
• Develop backend components using Java 8/11/17 and J2EE technologies.
• Work with Hibernate, JPA, and Spring Data for database operations.
• Design and optimize SQL queries, stored procedures, and database schemas.
• Implement application security using Spring Security and OAuth2.
• Develop and maintain applications using AWS services.
• Participate in application architecture, design discussions, and code reviews.
• Troubleshoot production issues and improve application performance.
• Collaborate with frontend developers, QA engineers, DevOps teams, and business stakeholders.
• Follow Agile/Scrum methodologies and participate in sprint planning and technical discussions.

Tools

Hibernate/JPA

JDBC

Kafka

RabbitMQ

Docker

Kubernetes

Git

Maven/Gradle

Jenkins

OAuth2

Job description

Quantum Technologies LLC in Madison, WI seeks an experienced Senior Java Developer with 7–8 years of hands-on experience to design, develop, and maintain scalable enterprise applications using Java, Spring Boot, and microservices. You will build RESTful APIs, integrate Hibernate/JPA, work with SQL databases, and implement security with Spring Security and OAuth2.

The role involves AWS cloud services, CI/CD pipelines, and collaborating with frontend, QA, DevOps, and business stakeholders in an