Full Stack Java developer (Back-end)

The ideal candidate will have strong hands-on experience building scalable backend applications using Java , along with experience working with MongoDB and PostgreSQL . Frontend experience with Angular, HTML, and CSS is required at a working/familiarity level, but extensive frontend expertise is not necessary.

Company Description
Lumen Solutions Group Inc. is a technology consulting Services company based in Florida. We provide a wide array of experienced business and IT professionals supporting clients from solution design to implementation and support. We specialize in professional IT consulting services, IT Staffing, Business/IT Strategy, Business Process Blueprints, Enterprise Architecture, Enterprise Transformation. 
 
Position: Full Stack Java developer (Back-end)
Duration: 3 months contract (till end of Dec 2026 - possibility of extension)
Locations: 100% remote.

Position Overview
We are seeking a Full Stack Java Developer with a strong focus on Java backend development to join our engineering team. This role is primarily backend-focused, with approximately 80% of the work involving backend development and 20% frontend development. The ideal candidate will have strong hands-on experience building scalable backend applications using Java, along with experience working with MongoDB and PostgreSQL. Frontend experience with Angular, HTML, and CSS is required at a working/familiarity level, but extensive frontend expertise is not necessary.
Experience with AWS is a plus but is not required.
 
Key Responsibilities

• Design, develop, test, and maintain robust backend applications using Java.
• Build and maintain scalable, reliable, and high-performance backend services and APIs.
• Work extensively with MongoDB and PostgreSQL for application data storage and management.
• Develop and integrate RESTful APIs and backend services.
• Troubleshoot, debug, and optimize backend applications and database performance.
• Collaborate with frontend developers and other engineering teams to deliver end-to-end solutions.
• Contribute to frontend development and enhancements using Angular, HTML, and CSS as needed.
• Participate in code reviews, technical discussions, testing, and deployment activities.
• Follow software development best practices, coding standards, and secure development practices.
• Work with cross-functional teams to understand requirements and translate them into technical solutions.
• Support application deployments and production troubleshooting when required.

 
Required Qualifications

• Strong professional experience in Java backend development.
• Hands-on experience developing backend applications, services, and APIs using Java.
• Strong database experience with:
  • MongoDB
  • PostgreSQL
• Working familiarity with Angular.
• Working knowledge of HTML and CSS.
• Strong understanding of backend architecture, API development, and application integration.
• Ability to troubleshoot and resolve complex technical issues.
• Strong communication and collaboration skills.

 
Preferred Qualifications

• Experience with AWS or other cloud platforms.
• Experience with RESTful web services and microservices architecture.
• Experience with modern Java/Spring-based backend development.
• Familiarity with CI/CD, Git, and modern software development practices.
• Experience working in Agile development environments.

 
Lumen Solutions Group Inc is an equal opportunity employer. All qualified applicants will be considered for employment without regard to any legally protected status.