Java Full Stack Developer

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

US Citizen, Green Card, H-1B, OPT-EAD, CPT, Other

Work Authorization: US Citizen, Green Card, OPT-EAD, CPT, H-1B, H4-EAD, Other

Job Summary:

We are seeking an experienced Senior Java Developer with 7–8 years of hands-on experience in designing, developing, and maintaining scalable enterprise applications. The ideal candidate should have strong expertise in Java, Spring Boot, Microservices architecture, RESTful APIs, and cloud technologies.

Key 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.

Required Technical Skills

7–8 years of professional Java development experience.

Strong knowledge of Core Java, OOP concepts, 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 experience using JUnit and Mockito.

Familiarity with Docker and Kubernetes.

Preferred Skills

Experience with Angular or React.

Knowledge of Redis and caching mechanisms.

Experience with performance tuning and application monitoring.

Familiarity with Kubernetes and cloud-native development.

Strong debugging, analytical, and problem-solving skills.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.