Software Developer - Multiple Levels - TS/SCI Poly Required

The Analysis Solutions Business Area at Leidos is seeking Software Developers at multiple experience levels to support a government customer in Reston, VA. Candidates will join a fast-paced, mission-focused team of government and contractor personnel developing innovative software and data-driven solutions. Successful candidates will bring strong technical skills, creativity, attention to detail, and the ability to solve complex problems in dynamic environments.This position is onsite in Reston, VA and requires an active TS/SCI with Polygraph for consideration.Basic Qualifications by level -Mid-Level Software Development EngineerBachelor’s degree in Computer Science, Information Systems, Systems Engineering, or related field with 4+ years of experience (or Master’s with 2+ years)2+ years supporting Intelligence Community or DoD environmentsExperience with software development using Java, Python, JavaScript, or TypeScriptExperience with full-stack development, including modern front-end frameworks (React/Angular) and backend services/APIsFamiliarity with SQL/NoSQL databases, ETL pipelines, and Docker/containerized environmentsExposure to cloud platforms (AWS preferred) and DevOps practicesExperience integrating AI/ML or LLM-based capabilities is a plusSenior Software Development EngineerBachelor’s degree with 8+ years of experience (or Master’s with 6+ years)3+ years supporting Intelligence Community or DoD missionsAdvanced experience in software architecture, system design, and scalable application developmentStrong background in data pipelines, ETL workflows, APIs, and cloud-native/containerized systemsExperience developing analytic, simulation, or scenario-based applicationsExperience integrating AI/ML, LLMs, or RAG-based solutions into production systemsAbility to lead development efforts and mentor junior engineersPrincipal Software Development Engineer / Technical LeadBachelor’s degree with 12+ years of experience (or Master’s with 10+ years)3+ years supporting Intelligence Community or DoD missionsDeep expertise in full-stack development, system architecture, and cloud-based platformsExperience designing complex analytic systems, simulation platforms, and large-scale data pipelinesStrong background in AI/ML, LLM integration, and advanced analyticsProven ability to lead technical strategy, prototype innovative solutions, and guide engineering teamsExcellent communication and stakeholder engagement skillsFor All Levels - Key ResponsibilitiesDesign, develop, and maintain mission-focused software applications and data platformsBuild and support ETL pipelines, APIs, and data integration workflowsDevelop web-based tools for analysis, visualization, and decision supportIntegrate AI/ML and advanced analytics capabilities into applicationsCollaborate with users and cross-functional teams to deliver scalable solutionsSupport testing, debugging, optimization, and deployment activitiesContribute to technical direction, documentation, and engineering best practicesFor All Levels - Preferred SkillsStrong problem-solving and analytical abilitiesExperience working in Linux/Unix and Dockerized environmentsFamiliarity with AWS cloud services and DevOps methodologiesAbility to work independently and collaboratively in fast-paced mission environmentsStrong written and verbal communication skillsIf 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.Original Posting:May 6, 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.Pay Range:Pay Range $87,100.00 - $157,450.00The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.SummaryLocation: Reston, VAType: Full time