{"id":4327073,"url":"https://alion.io/job/leidos-jr-software-engineer-3","title":"Jr Software Engineer","company":{"id":7791,"name":"Leidos","domain":"leidos.com","url":"https://alion.io/company/leidos","size_band":"5000+","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":77,"open_postings":339,"ghost_share":0.006,"stale_share":0.912,"repost_share":0.012,"time_to_fill_p50_days":27,"computed_at":"2026-11-14T05:58:10Z"}},"role":"Backend","role_family":"Backend","seniority":"junior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Gaithersburg, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":69550,"max":125725,"currency":"USD","period":"year","gross":null,"usd_annual":125725},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"AI Agents","optional":false},{"name":"Ansible","optional":false},{"name":"AWS","optional":false},{"name":"Bamboo","optional":false},{"name":"Bash","optional":false},{"name":"Bitbucket","optional":false},{"name":"C++","optional":false},{"name":"CI/CD","optional":false},{"name":"Confluence","optional":false},{"name":"Docker","optional":false},{"name":"Doctrine","optional":false},{"name":"Drupal","optional":false},{"name":"Eloquent","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"Jenkins","optional":false},{"name":"Jira","optional":false},{"name":"Linux","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"MySQL","optional":false},{"name":"Oracle","optional":false},{"name":"PHP","optional":false},{"name":"Pillow","optional":false},{"name":"Playwright","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Prompt Engineering","optional":false},{"name":"Pytest","optional":false},{"name":"Python","optional":false},{"name":"RAG","optional":false},{"name":"Rest API","optional":false},{"name":"Scrum","optional":false},{"name":"Selenium","optional":false},{"name":"SonarQube","optional":false},{"name":"SQL","optional":false},{"name":"Terraform","optional":false},{"name":"TypeScript","optional":false},{"name":"Unix","optional":false}],"status":"live","first_seen_at":"2026-11-12T00:00:00Z","employer_posted_date":"2026-11-12","last_verified_at":"2026-11-15T05:00:42Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"description":"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.\nNationwide 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 NextGen 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) NextGen 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.\nWe 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).\nCandidates must be local to and can work 3 days a week in one of the following locations: Gaithersburg, MD; Atlantic City, NJ; or Eagan, MN.\n Responsibilities:\nArchitect, 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)\nArtificial Intelligence and AI-Assisted Development (Generative AI, LLMs, AI coding assistants, RAG, AI agents, prompt engineering, and AI MCP servers)\nDevOps and CI/CD tooling (Bamboo, Docker, SonarQube, Ansible)\n\nProvide 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).\nInvestigate and repair application defects regardless of component: automation, front-end, business logic, middleware, or database (PL/SQL and Data Modeling).\nBrief management, customer, team, or vendors using written or oral skills at appropriate technical level for audience\nAll other duties as assigned or directed\nBasic Qualifications:\nBachelor’s degree in computer science, software engineering, mathematics, engineering, or related technical discipline. Master’s or Doctorate degree may substitute for required experience.\n3+ years of combined experience with modern software development (Python, Java, PHP)\nExperience working in Agile software development environments.\nMust be able to obtain and maintain a Public Trust clearance.\nWillingness to travel at least 50% as needed\nThis program requires a Public Trust security clearance, in order to obtain/maintain a Public Trust, candidates must hold US citizenship or Permanent Residency\nRequired Skills:\nSolid understanding of modern Python libraries and frameworks, including GeoPandas, Fiona, Pillow, PyTesseract, and XMLDiff, with experience developing geospatial, document-processing, and data transformation applications.\nExperience developing modern Python applications using object-oriented design principles, type annotations, asynchronous programming, automated testing frameworks, and secure software development best practices.\nProven experience designing, developing, and maintaining software applications used to create, validate, transform, and manage structured data formats including JSON, CSV, XML, XSD, and XSLT.\nDemonstrated knowledge of XML schema design (XSD), XSLT transformations, and structured data validation techniques.\nExperience 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.\nSolid knowledge of front-end technologies including HTML5, JavaScript/TypeScript, CSS3, and responsive UI development principles.\nStrong experience in automating tasks with scripting languages like Bash, Shell, or Python\nExperience in use of the UNIX and Linux operating systems and automating tasks with scripting languages like Bash, Shell\nExperience using DevOps and CI/CD tools including Git/Bitbucket, Bamboo/Jenkins, SonarQube, and automated build/deployment pipelines.\nExperience with Artificial Intelligence and AI-Assisted Development (Generative AI, LLMs, AI coding assistants, RAG, AI agents, prompt engineering, and AI MCP servers)\nDesired Qualifications:\nStrong experience with Ansible Automation and authoring playbooks and roles for installing, maintaining, or upgrading platforms\nExperience building, packaging, and deploying software applications in Linux environments using RPM-based distribution mechanisms.\nExperience deploying or supporting applications in AWS cloud environments, related certifications.\nExperience with PHP software development and Drupal.\nExperience using Atlassian collaboration and development tools including Jira, Confluence, Bitbucket, and Bamboo.\nExperience with relational databases including PostgreSQL, MySQL , and Oracle including SQL optimization and ORM technologies such as Doctrine or Eloquent.\nExperience with FAA and air traffic domain knowledge.\nWillingness to travel to customer sites\nIf you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.\nOriginal Posting:\nNovember 12, 2026For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.\nPay Range:\nPay Range $69,550.00 - $125,725.00The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. 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