Java Developer

Quantum Technologies. LLC; Seattle (WA); On-site; USD 120,000 - 160,000; Full time

Job summary

Quantum Technologies. LLC in Seattle is seeking a skilled Java Developer to design, develop, test, and maintain scalable, high-performance applications.

The ideal candidate should have strong experience in Java, Spring Boot, REST APIs, microservices, database technologies, and modern software development practices. The role involves building enterprise applications using Java and J2EE technologies, creating scalable backend services with Spring Boot, and developing RESTful APIs.

Qualifications

• Strong programming experience in Java 8 or later.
• Good understanding of OOP concepts, collections, multithreading, exception handling, and Java fundamentals.
• Experience with Spring, Spring Boot, Spring MVC, and Spring Data JPA.
• Hands-on experience developing REST APIs and microservices.
• Knowledge of Hibernate, JPA, and ORM concepts.
• Experience with SQL and relational databases.
• Familiarity with Git, Maven/Gradle, and CI/CD pipelines.
• Experience with JUnit, Mockito, and unit testing.
• Understanding of design patterns, SOLID principles, and application architecture.
• Knowledge of Agile methodologies and software development life cycle (SDLC).

Responsibilities

• Design, develop, and maintain enterprise applications using Java and J2EE technologies.
• Build scalable backend services using Spring Boot and Spring Framework.
• Develop and integrate RESTful APIs and web services.
• Design and implement microservices-based architectures.
• Write clean, reusable, efficient, and maintainable code.
• Work with relational databases such as Oracle, MySQL, or PostgreSQL.
• Write SQL queries, stored procedures, and database integration logic.
• Implement application security, authentication, and authorization.
• Perform unit testing, debugging, troubleshooting, and code reviews.
• Collaborate with business analysts, QA engineers, DevOps teams, and other developers.
• Use Git for version control and Maven or Gradle for build management.
• Participate in Agile/Scrum ceremonies and contribute to continuous improvement.
• Support application deployments, production issues, and performance optimization.
• Create and maintain technical documentation.

Skills

Java 8+

Spring Boot

REST APIs

Microservices

SQL Databases

Git

Maven/Gradle

JUnit/Mockito

SDLC

Agile

Tools

Git

Maven/Gradle

Hibernate/JPA

Job description

We are looking for a skilled Java Developer to design, develop, test, and maintain scalable, high-performance applications. The ideal candidate should have strong experience in Java, Spring Boot, REST APIs, microservices, database technologies, and modern software development practices.

Roles and Responsibilities

Design, develop, and maintain enterprise applications using Java and J2EE technologies.

Build scalable backend services using Spring Boot and Spring Framework.

Develop and integrate RESTful APIs and web services.

Design and implement microservices-based architectures.

Write clean, reusable, efficient, and maintainable code.

Work with relational databases such as Oracle, MySQL, or PostgreSQL.

Write SQL queries, stored procedures, and database integration logic.

Implement application security, authentication, and authorization.

Perform unit testing, debugging, troubleshooting, and code reviews.

Collaborate with business analysts, QA engineers, DevOps teams, and other developers.

Use Git for version control and Maven or Gradle for build management.

Participate in Agile/Scrum ceremonies and contribute to continuous improvement.

Support application deployments, production issues, and performance optimization.

Create and maintain technical documentation.

Required Technical Skills

Strong programming experience in Java 8 or later.

Good understanding of OOP concepts, collections, multithreading, exception handling, and Java fundamentals.

Experience with Spring, Spring Boot, Spring MVC, and Spring Data JPA.

Hands-on experience developing REST APIs and microservices.

Knowledge of Hibernate, JPA, and ORM concepts.

Experience with SQL and relational databases.

Familiarity with Git, Maven/Gradle, and CI/CD pipelines.

Experience with JUnit, Mockito, and unit testing.

Understanding of design patterns, SOLID principles, and application architecture.

Knowledge of Agile methodologies and software development life cycle (SDLC).

Preferred Skills

Experience with cloud platforms such as AWS, Azure, or GCP.

Knowledge of Docker and Kubernetes.

Experience with Kafka or other messaging technologies.

Familiarity with Redis or other caching solutions.

Exposure to Jenkins, GitHub Actions, or similar CI/CD tools.

Knowledge of monitoring, logging, and application performance tuning.

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.