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Java Backend Developer

Job in Newark, Essex County, New Jersey, 07175, USA
Listing for: Spectraforce Technologies
Contract position
Listed on 2026-02-06
Job specializations:
  • Software Development
    Java Developer, Backend Developer, Software Engineer, Full Stack Developer
Job Description & How to Apply Below

Job Title
:
Java Backend Developer

Duration
: 12 Months (Contract To Hire)

Location
:
Newark, NJ (Hybrid)

Responsibilities
  • Lead and execute the migration from legacy Java applications to modern Java frameworks.
  • Develop, maintain, and optimize enterprise-scale applications new and old Java frameworks (EJB, Spring Boot, etc).
  • Collaborate with cross-functional teams to design, develop, and deploy high-quality software solutions.
  • Integrate AI-assisted development tools, with a focus on using Claude.
  • Provide technical leadership and mentoring to junior developers.
  • Ensure code quality, security, and performance across systems.
Required Qualifications
  • 15+ years of professional Java development experience.
  • Strong proficiency in old and modern Java frameworks as well as old web servers (like Websphere) and new (AWS ECS or Kubernetes)
  • Demonstrated hands-on experience in Java modernization/migration projects.
  • Expertise in converting legacy Java codebases to updated architectures.
  • Application Programming Interfaces (API):
    Consumption & Development; implementing service oriented architecture (SOA) patterns;
    Web service technologies such as APIs, REST, JSON, SOAP, XML, JDBC, MySQL
  • Unit, interface and end user testing concepts and tooling (functional & non-functional)
  • Automated testing
  • Software security skills including secure coding, web application security and Dev Sec Ops ;
    Solid grasp of security concepts (authentication, authorization, encryption, digital signature, JWT), SSL, web service proxies, firewall, SAML 2.0, OpenID Connect, OAuth 2.0)
  • Dev Ops Tools & Practices:
    Branching techniques and usage of Git Hub or Bitbucket;
    Dev Ops, Jenkins or Git Hub Actions
  • Software Development Life Cycle (SDLC):
    Monitoring and logging techniques
  • Familiarity with Claude AI coding capabilities.
  • Strong problem-solving, debugging, and optimization skills.
  • Ability to work independently and in teams with minimal supervision.
  • Must be located in NY or NJ.
Preferred Qualifications
  • Experience in the insurance industry.
  • Japanese language proficiency is a plus (not a must)
  • Portfolio or Git Hub repositories showcasing similar Java migration projects.
  • Conduct live coding in interview sessions to demonstrate technical skills.
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