Java Full-Stack Engineer | Spring Boot, REST APIs

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

Job summary

Quantum Technologies. LLC in Seattle is seeking a full‑stack software engineer to design and implement scalable enterprise applications. You will work across the stack—Java/Spring Boot for the backend, RESTful APIs for service integration, and frontend work with Angular or React.js.

You will also focus on security, data storage, and microservices architectures. The role emphasizes clean code, testing, and collaboration across teams to deliver robust software throughout the lifecycle.

Qualifications

• Design and develop enterprise applications using Java and Spring Boot.
• Build scalable backend services and RESTful APIs.
• Develop frontend applications using Angular or React.js.
• Implement application security and authentication mechanisms.
• Integrate applications with relational and NoSQL databases.
• Develop microservices-based application architectures.
• Write clean, reusable, and maintainable code.
• Perform unit testing, integration testing, and debugging.
• Participate in application deployment and production support.
• Collaborate with cross-functional teams throughout the software development lifecycle.

Responsibilities

• Design and develop enterprise applications using Java and Spring Boot.
• Build scalable backend services and RESTful APIs.
• Develop frontend applications using Angular or React.js.
• Implement application security and authentication mechanisms.
• Integrate applications with relational and NoSQL databases.
• Develop microservices-based application architectures.
• Write clean, reusable, and maintainable code.
• Perform unit testing, integration testing, and debugging.
• Participate in application deployment and production support.
• Collaborate with cross-functional teams throughout the software development lifecycle.

Skills

RESTful API design

Tools

Java

Spring Boot

Angular

React.js

Relational databases

NoSQL databases

Microservices

Job description

Quantum Technologies. LLC in Seattle is seeking a full‑stack software engineer to design and implement scalable enterprise applications. You will work across the stack—Java/Spring Boot for the backend, RESTful APIs for service integration, and frontend work with Angular or React.js.

You will also focus on security, data storage, and microservices architectures. The role emphasizes clean code, testing, and collaboration across teams to deliver robust software throughout the lifecycle.