Senior Backend Java Engineer - Hybrid (Azure/Spring)

Zillion Technologies Inc.; Vienna (VA); Hybrid; USD 103,000 - 117,000; Full time

Job summary

Zillion Technologies Inc. is seeking a mid-to-senior Backend Java Developer for a long-term hybrid role in San Diego, CA. You will design, develop, test, and maintain backend services and APIs that support mobile, web, and partner systems.

You will collaborate with analysts, QA, and frontend engineers to deliver secure, scalable, and reliable solutions. The ideal candidate will have strong Java 17+, Spring/Spring Boot experience, cloud familiarity (Azure preferred), and a track record of

Qualifications

• Strong Java experience with Java 17 or newer.
• Solid knowledge of enterprise Java, Spring, Spring Boot, web services, and RESTful APIs.
• Experience with automated testing frameworks (JUnit, Mockito).
• Proficiency with Git and CI/CD tools (Maven, Docker, Jenkins, GitHub, Azure DevOps).
• Strong understanding of databases, SQL, and data integration patterns.
• Experience troubleshooting distributed systems and designing scalable microservices.
• Experience developing cloud-native apps, Azure preferred.

Responsibilities

• Design, build, and maintain secure backend services and APIs for mobile, web, and partner systems.
• Design for performance, reliability, resiliency, observability, quality, and responsiveness.
• Collaborate with cross-functional teams to deliver sustainable technical solutions.
• Develop and maintain unit, integration, and automated tests for reliable delivery.
• Apply secure coding, data protection, and engineering standards.
• Troubleshoot production defects and performance bottlenecks in complex service dependencies.
• Refactor code and conduct peer reviews to improve security and maintainability.
• Contribute to solution design, documentation, and architectural decisions.
• Support services across testing, deployment, and production operations.
• Participate in Agile ceremonies and advocate for automation and continuous improvement.
• Share knowledge and mentor less experienced engineers.

Skills

Java

Spring Framework

Spring Boot

RESTful APIs

JUnit

Mockito

Git

CI/CD Tools

SQL Databases

Azure Cloud

Microservices

Tools

Maven

Docker

Jenkins

GitHub

Azure DevOps

Job description

Zillion Technologies Inc. is seeking a mid-to-senior Backend Java Developer for a long-term hybrid role in San Diego, CA. You will design, develop, test, and maintain backend services and APIs that support mobile, web, and partner systems.

You will collaborate with analysts, QA, and frontend engineers to deliver secure, scalable, and reliable solutions. The ideal candidate will have strong Java 17+, Spring/Spring Boot experience, cloud familiarity (Azure preferred), and a track record of