Senior Full Stack Software Engineer

Zachary Piper Solutions is seeking a Senior Full Stack Software Engineer to support a company focused on modernizing and developing enterprise-scale federal law enforcement applications using a PostgreSQL, Java, and React technology stack. This position is On-site in Washington, DC. The Senior Full Stack Software Engineer will design, develop, test, and deploy mission-critical software capabilities supporting a high-visibility application modernization initiative. This is an opportunity to directly impact the delivery of critical technology solutions that enhance operational effectiveness and mission success.

Responsibilities for the Senior Full Stack Software Engineer include:

• Design, develop, implement, test, and maintain front-end and back-end application components.
• Develop and integrate custom capabilities, RESTful APIs, and enhancements within existing enterprise applications.
• Participate in requirements analysis, sprint planning, development, testing, quality assurance, and other full SDLC activities.
• Conduct code reviews, contribute to architecture discussions, and implement development best practices.
• Support CI/CD pipelines, application deployments, version control processes, and ongoing system optimization efforts.

Required Qualifications for the Senior Full Stack Software Engineer include:

• 8+ years of experience in full stack software engineering and enterprise application development.
• Strong technical experience with Java, React, JavaScript/TypeScript, PostgreSQL, SQL, REST APIs, GitLab, CI/CD pipelines, and containerization technologies.
• Experience working within Agile environments, collaborating across cross-functional teams, and supporting large-scale software deployments.
• Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related field (or equivalent experience).
• Active Top Secret Clearance

Compensation for the Senior Full Stack Software Engineer include:

Salary Range: $160,000 - $175,000 depending on experience

Full Benefits Package: PTO, Paid Holidays, Medical, Dental, Vision, 401K, Sick leave as required by law

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This job opens for applications on 8/10/2026. Applications for this job will be accepted for at least 30 days from the posting date.

Keywords:

Senior Full Stack Software Engineer, Full Stack Developer, Java Developer, React Developer, Software Engineer, Enterprise Application Development, PostgreSQL Developer, JavaScript Developer, TypeScript Developer, REST API Developer, Agile Software Engineer, CI/CD Engineer, GitLab Developer, Containerization, Backend Engineer, Frontend Engineer, SDLC, Application Modernization, Federal Technology, Enterprise Systems,