Java Backend Engineer - Onsite Interview required

System One Holdings, LLC

$110K — $130K *
Information Technology
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • Strong experience with Java, preferably Java 17 or newer.
  • Expertise in enterprise Java, Spring, Spring Boot, web services, and RESTful APIs.
  • Familiarity with automated testing frameworks, including JUnit and Mockito.
  • Proficiency in Git and CI/CD tools (Maven, Docker, Jenkins, GitHub, Azure DevOps).
  • Solid understanding of databases, SQL, and data integration patterns.
  • Experience in troubleshooting distributed systems and building scalable, resilient microservices.
  • Familiarity with cloud-native applications, especially in Microsoft Azure.

Responsibilities

  • Design and maintain secure backend services and APIs for various platforms.
  • Ensure performance, reliability, and quality in product design.
  • Collaborate with teams to create sustainable technical solutions.
  • Develop and maintain various types of tests for reliable delivery.
  • Implement secure coding practices and adhere to engineering standards.
  • Address and troubleshoot production issues and service dependencies.
  • Participate in code refactoring and peer reviews for quality improvements.
  • Contribute to technical documentation and architectural proof-of-concepts.
  • Support services through various operational stages and continuous improvement efforts.
  • Engage in Agile practice and share knowledge to mentor junior engineers.

Benefits

  • Health and welfare benefits coverage (medical, dental, vision).
  • Access to spending accounts and life insurance options.
  • Participation in 401(k) plan with employer contributions.
Full Job Description
Job Title: Java Backend Engineer
Location: Vienna, VA ONSITE INTERVIEW REQUIRED
Type: Contract, long term expected
Compensation:W-2 or C2C, H1B ok, no OPT
Work Model: Hybrid - 3 days onsite and 2 days remote
Hours: 40 hours a week


Responsibilities

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


Requirements

  • Strong Java experience, with Java 17 or newer preferred.
  • Solid knowledge of enterprise Java, Spring, Spring Boot, web services, and RESTful APIs.
  • Experience with automated testing frameworks and practices, such as JUnit and Mockito.
  • Proficiency with Git and CI/CD tools such as Maven, Docker, Jenkins, GitHub, or Azure DevOps.
  • Strong understanding of databases, SQL, and data integration patterns.
  • Experience troubleshooting distributed systems and designing scalable, resilient, observable microservices.
  • Experience developing cloud-native applications, with Microsoft Azure strongly preferred.
  • Effective communication, independent prioritization, and collaboration skills, including the ability to explain technical concepts to non-technical audiences.


System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

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#LI-CB3

Ref: #851-Rockville-S1

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