Full Stack Software Engineer

Full-Stack Developer Candidates must be able to obtain and/or maintain a Department of Defense Secret Security Clearance as a condition and continuation of employment Location: Andover or Tucson (Hybrid — once a week onsite minimum) Job Type: 6 month contract with potential to extend Experience Level: 5–10 years Position Summary We are seeking a Full-Stack Developer with 5–10 years of professional experience in Java and ReactJS to support mission-critical software systems. The ideal candidate will design, develop, and maintain scalable web applications that integrate secure backend services with dynamic, responsive front-end interfaces. The role requires strong problem-solving skills, attention to detail, and the ability to collaborate effectively in a structured, security-conscious environment. Key Responsibilities

• Develop, test, and maintain full-stack applications using Java (Spring Boot) and ReactJS.
• Design RESTful APIs and ensure secure, efficient communication between front-end and back-end components.
• Collaborate with UI/UX designers, systems engineers, and database administrators to implement robust software solutions.
• Participate in code reviews, integration testing, and deployment pipelines.
• Write clean, maintainable code adhering to project-specific security and coding standards.
• Troubleshoot and resolve issues across the stack to ensure application reliability and performance.
• Support migration of legacy applications to modern web architectures where required.

• 5–10 years of experience in full-stack development using Java (Spring Boot) and ReactJS.
• Strong understanding of object-oriented programming, RESTful API design, and secure web application development.
• Proficiency with JavaScript, HTML5, CSS3, and modern frameworks such as Redux or Next.js.
• Experience with relational databases (MySQL, PostgreSQL, or Oracle).
• Familiarity with Git, CI/CD tools, and Agile development practices.
• U.S. Citizenship (mandatory for access to defense-related systems).

• Experience in a DoD or aerospace/defense environment.
• Working knowledge of containerization and orchestration (Docker, Kubernetes).
• Familiarity with DevSecOps pipelines and secure coding practices.
• Experience integrating APIs with identity management systems (OAuth2, SAML, etc.).

• May require working in secure facilities or with sensitive defense data systems.
• Flexibility to collaborate across time zones and travel occasionally for project needs.
• Adherence to project-specific documentation, cybersecurity, and compliance standards is mandatory. Apex Systems