Software Engineer; React​/Java​/Full Stack

Job description:
Software Engineer (React/Java/Full Stack)

Constellation seeks a Software Engineer(Junior) to join our Homeland Security Team in Washington, DC. This role is designed for a developer who is comfortable across the stack, specifically building modern user interfaces in React and supporting robust backend services in Java/Spring Boot (or similar frameworks). You will work on mission-critical applications that integrate data collection, operational reporting, and intelligent automation to support national security objectives.

This position involves close collaboration with analysts, engineers, and stakeholders to deliver mission-driven capabilities across multiple work streams.

Key Responsibilities:

• Full-Stack Development:
  Build and maintain responsive web applications using React, integrating them with backend services and APIs
• System Integration:
  Support the development of backend logic and data services using Java/Spring or equivalent frameworks
• User-Centric Design:
  Collaborate with analysts and stakeholders to translate complex data requirements into intuitive, high-performance user interfaces
• Agile
  
  Collaboration:
  
  Participate in sprint planning, code reviews, and technical design sessions within a tight-knit engineering team
• Quality Assurance:
  Write unit tests and participate in CI/CD workflows to ensure the reliability of production code

The ideal candidate must have the following experience, background, and credentials:

• 2 - 5 years of professional experience in software development, with a proven ability to work in frontend frameworks like React and backend ecosystems such as Java/Spring, C#/.NET, or similar enterprise-grade languages
• Strong experience developing front-end applications using HTML, Type Script, and CSS with a focus on responsive design and modern UI/UX
• Strong understanding of RESTful APIs, React component design and common component libraries, and secure web development practices
• Proficiency in writing unit tests using frameworks such as Jest
• Experience working in a collaborative code environment and familiarity with Git, CI/CD pipelines, and modern development workflows
• Bachelor’s degree in Computer Science, Software Engineering, or a related field
• Be a U.S. citizen able to pass a background investigation by the client agency. DHS clearance with CBP/ICE or DoD Top-Secret preferred

Job Type: Full-time

Education
:

• Bachelor's (Required)

Experience
:

• React: 2 years (Required)
• Front-end development: 2 years (Required)