Junior Software Engineer

Leidos is seeking a Junior Software Engineer, who will be a member of a dynamic team in Gaithersburg, MD, working on the development/maintenance of software that improves aircraft runway and terminal congestion.

Nationwide congestion is increasing, and the need for efficient aircraft traffic planning is critical. The Federal Aviation Administration (FAA) Terminal Flight Data Manager (TFDM) is the surface management solution that will provide Next Gen Air Traffic Control capabilities to improve air traffic operations in the National Airspace System (NAS). The Terminal Flight Data Management (TFDM) program is a Federal Aviation Administration's (FAA) Next Gen program based on airport surface management that provides efficiency for both the airport surface and terminal airspace by providing a new and comprehensive integrated surface traffic control and management system.

We are a team of forward-looking professionals in need of a strong candidate with these key required skills
:
Modern Development ( Python, Java, C++, PHP), Structured Data (XML, XSD, XSLT, JSON, CSV), Agile / Scrum development, AI-Assisted Development, relational databases (PostgreSQL, MySQL, Oracle).

This position can be remote, however preference will be given to those who are local to and can work 3 days a week in one of the following locations:
Gaithersburg, MD;
Atlantic City, NJ; or Eagan, MN.

• Architect, design, develop, and implement next‑generation application using software engineering best practices in the latest technologies:

  • Infrastructure-as-Code and Configuration-as-Code (Terraform, Ansible)

  • Artificial Intelligence and AI-Assisted Development (Generative AI, LLMs, AI coding assistants, RAG, AI agents, prompt engineering, and AI MCP servers)

  • Dev Ops and CI/CD tooling (Bamboo, Docker, Sonar Qube, Ansible)

• Provide software expertise in one or more of these areas: application integration, RESTful services, Artificial Intelligence, security, workflow automation, module integration, user experience (UX), and accessibility compliance (Section 508/WCAG/USDS standards).

• Investigate and repair application defects regardless of component: automation, front‑end, business logic, middleware, or database (PL/SQL and Data Modeling).

• Brief management, customer, team, or vendors using written or oral skills at appropriate technical level for audience

• All other duties as assigned or directed

• Bachelor's degree in computer science, software engineering, mathematics, engineering, or related technical discipline. Master's or Doctorate degree may substitute for required experience.

• 3+ years of combined experience with modern software development (Python, Java, PHP)

• Experience working in Agile software development environments.

• Willingness to travel at least 50% as needed

• This program requires a Public Trust security clearance, in order to obtain/maintain a Public Trust, candidates must hold US citizenship or Permanent Residency

• Solid understanding of modern Python libraries and frameworks, including Geo Pandas, Fiona, Pillow, PyTesseract, and XMLDiff, with experience developing geospatial, document‑processing, and data transformation applications.

• Experience developing modern Python applications using object‑oriented design principles, type annotations, asynchronous programming, automated testing frameworks, and secure software development best practices.

• Proven experience designing, developing, and maintaining software applications used to create, validate, transform, and manage structured data formats including JSON, CSV, XML, XSD, and XSLT.

• Demonstrated knowledge of XML schema design (XSD), XSLT transformations, and structured data validation techniques.

• Experience with automated testing methodologies including unit, integration, end‑to‑end, and behavior‑driven testing using tools such as pytest, Behave, Selenium, Playwright, and test automation frameworks.

• Solid knowledge of front‑end technologies including HTML5, JavaScript/Type Script, CSS3, and responsive UI development principles.

• Strong experience in automating tasks with scripting languages like Bash, Shell, or Python

• Experience in use of the UNIX and…