Full Stack Developer

Description

Leidos is seeking an experienced Full Stack Developer to support the Compartmented Enterprise Services Office (CESO) program delivering mission-focused software capabilities for DISA. This role develops, tests, and maintains secure, reliable applications across the full technology stack (front-end, APIs/services, and data). Full stack developers can switch between front‑end and back‑end development based on requirements and help the team prototype rapidly when needed.

This person should be a seasoned, self‑motivated, and professional with at least 8 years of hands‑on engineering and administration experience in virtualized Information Technology environments.

This position is 100% on‑site in Arlington, VA. Occasional, situational travel within the DC‑Metro area may be required.

• Design, develop, test, and maintain full‑stack applications (UI, service/API layer, and data access layer) in an Agile delivery environment.
• Participate in software programming initiatives to support innovation and enhancement, using Java, JavaScript, Python, Spring Boot,
• Implement responsive, user‑friendly front‑end features and collaborate with UX/design to ensure usable, accessible experiences.
• Build and maintain back‑end services and APIs; implement business logic, integrations, and data access patterns.
• Develop, maintain, and evolve a modernized database architecture aligned to modernization initiatives, including cloud adoption.
• Create and optimize database queries and data models; ensure data integrity and performance.
• Write automated tests and participate in code reviews to improve quality, security, and maintainability.
• Troubleshoot, debug, and resolve defects across the stack; support production and lower‑environment issue resolution as required.
• Produce technical documentation (design notes, API documentation, and operational runbooks) aligned to program needs.
• Operate and improve reliability/availability through monitoring, alerting, incident response, and continual service improvement.
• Produce and maintain technical documentation (build guides, runbooks, diagrams, and operational procedures).
• Stage new and upgraded services components or services to integration and testing environment.
• Develop and engineer improvements to the infrastructure and architecture to support continuous development and continuous integration utilizing modern practices and tools.
• Support and perform deployment orchestration, automation, and security configuration management (i.e., Cloud Formation, Terraform, Ansible, Git Lab, Bitbucket).
• Maintain documentation of code developed in support of CESO environments.
• Support patching, logging, vulnerability scanning, and compliance tracking.
• Participate in the release management process.
• Participate in Agile ceremonies (daily stand‑ups, sprint planning, retrospectives) and Jira‑based task tracking.

• Candidate must currently have a TS and SCI eligible with the ability to obtain and maintain a CI Poly.
• BA/BS and 8 years minimum of experience in Information Technology.
• Demonstrated experience developing and supporting applications across the full stack (front‑end + back‑end + database).
• Experience with modern front‑end fundamentals (HTML/CSS/JavaScript) and building responsive user experiences.
• Experience with back‑end development concepts such as APIs, server‑side logic, and database interaction.
• Hands‑on technical experience in at least three of the following areas:
  Oracle, SQL Server, Java, engineered systems, cloud technologies, data integration, automated testing and deployments, and Dev Sec Ops .
• Strong background in automated testing, CI/CD, and modern software delivery practices.
• Experience with software development languages/environments such as:
  JavaScript, Git Lab, Jenkins, Ansible Automation, Java, PSSQL, YAML, and Terraform.
• Ability to work effectively with cross‑functional teammates and contribute across the full development lifecycle.
• 4 years' experience with tools to include Ansible, Terraform, JMETER, EC2, ELB, RDS, Lambda, Docker.
• Experience with deployment orchestration, automation, and security configuration management (i.e., Cloud Formation,…