{"id":2904325,"url":"https://alion.io/job/general-dynamics-information-technology-senior-software-engineer-tssci-with-polygraph","title":"Senior Software Engineer - TS/SCI with Polygraph","company":{"id":4418,"name":"General Dynamics Information Technology","domain":"gdit.com","url":"https://alion.io/company/gdit","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":96,"open_postings":33,"ghost_share":0,"stale_share":0.364,"repost_share":0,"time_to_fill_p50_days":10,"computed_at":"2026-10-22T06:10:10Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Chantilly, United States","McLean, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":141100,"max":190900,"currency":"USD","period":"year","gross":null,"usd_annual":190900},"salary_estimate":null,"experience_years_min":6,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"AWS","optional":false},{"name":"Bootstrap","optional":false},{"name":"Git","optional":false},{"name":"GitHub","optional":false},{"name":"JavaScript","optional":false},{"name":"Linux","optional":false},{"name":"Ruby on Rails","optional":false},{"name":"Vue.js","optional":false},{"name":"CI/CD","optional":true},{"name":"Ruby","optional":true}],"status":"live","first_seen_at":"2026-10-15T00:00:00Z","employer_posted_date":"2026-10-15","last_verified_at":"2026-10-21T23:49:23Z","board_verified":true,"closed_at":null,"days_open":7,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":7},"description":"Type of Requisition:\nRegularClearance Level Must Currently Possess:\nTop Secret SCI + PolygraphClearance Level Must Be Able to Obtain:\nNonePublic Trust/Other Required:\nNoneJob Family:\nSoftware EngineeringJob Qualifications:\nSkills:\nComplex Systems, Software Design, Software DevelopmentCertifications:\nNoneExperience:\n6 + years of related experienceUS Citizenship Required:\nYes Job Description:\nAt GDIT, people are our differentiator. As a Senior Software Engineer supporting our Intelligence Community customer, you will be trusted to solve complex technical challenges while delivering mission-critical capabilities that directly support national security objectives.\nWe are seeking a highly motivated and experienced software engineer with an active TS/SCI clearance with Polygraph to join an Operations and Maintenance (O&M) team responsible for supporting enterprise applications used across the Intelligence Community. In this role, you will collaborate with Agile development teams to maintain, enhance, and improve applications serving a broad range of IC customers. Responsibilities include responding to user inquiries, troubleshooting and resolving issues, implementing system enhancements, and supporting the ongoing evolution of mission-focused applications.\nIn addition to sustaining the current production environment, the successful candidate will play a key role in the modernization effort to develop and transition users to a next-generation application, while supporting the planned decommissioning of the legacy platform. This position offers a unique opportunity to contribute to both operational support and the future architecture of a critical IC mission system.\nHOW A SENIOR SOFTWARE ENGINEER WILL MAKE AN IMPACT:\nProvide Operations and Maintenance (O&M) support for mission-critical applications used by Intelligence Community customers.\nRespond to user-reported issues and questions, troubleshoot problems, and implement solutions in a timely manner.\nDesign, develop, test, and deploy software enhancements and new capabilities.\nCollaborate with stakeholders to gather requirements and translate business needs into technical solutions.\nParticipate in Agile ceremonies including sprint planning, daily standups, reviews, and retrospectives.\nMaintain and improve application performance, reliability, and security.\nDevelop and maintain technical documentation and system artifacts for legacy system.\nSupport application integrations and data exchange with external systems and services.\nWork closely with team members to continuously improve development, deployment, and support processes.\nSupport the lifecycle management of both legacy and modernized applications, ensuring continuity of operations throughout migration efforts.\nContribute to the design, development, testing, and deployment of a new application while maintaining and enhancing the existing production system.\nAssist with planning and executing the decommissioning of legacy application components, services, and infrastructure. \nREQUIRED SKILLS AND EXPERIENCE:\nSelf-starter mentality with a strong desire to learn and deliver solutions efficiently to customers.\nStrong understanding of software design fundamentals and object-oriented programming principles.\nExperience applying modern software engineering principles including SOLID, DRY, KISS, and YAGNI.\nExperience working in Linux-based development environments.\nUnderstanding of Git/GitHub source control and Agile development methodologies.\nExperience architecting and developing web applications.\nExperience developing applications using Ruby on Rails.\nExperience with JavaScript frameworks such as ExtJS and/or VueJS.\nExperience utilizing Bootstrap for responsive user interface development.\nExperience deploying and supporting solutions in Amazon Web Services (AWS).\nDESIRED SKILLS:\nAWS certifications.\nExperience integrating and unifying records from multiple data sources.\nExperience developing applications that consume and integrate external APIs.\nExperience supporting applications in a secure Intelligence Community environment.\nUnderstanding of DevSecOps practices and CI/CD pipelines.\nWHAT YOU'LL NEED TO SUCCEED:\nEducation\nBachelor's degree in Computer Science, Software Engineering, Information Systems, or a related technical discipline. Equivalent combinations of education, technical certifications, training, and experience will be considered.\nExperience\n6+ years of software development experience.\nExperience supporting enterprise web applications in production environments.\nExperience working within Agile software development teams.\nClearance\nActive TS/SCI with Polygraph required.\nU.S. Citizenship required.\nLocation\nChantilly, VA or McLean, VA\nOn customer site\nGDIT IS YOUR PLACE:\n401K with company match\nComprehensive health and wellness packages\nInternal mobility team dedicated to helping you own your career\nProfessional growth opportunities including paid education and certifications\nCutting-edge technology you can learn from\nRest and recharge with paid vacation and holidays\n#VA_2026Alumni\nThe likely salary range for this position is $141,100 - $190,900. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.Scheduled Weekly Hours:\n40Travel Required:\nLess than 10%Telecommuting Options:\nOnsiteWork Location:\nUSA VA ChantillyAdditional Work Locations:\nUSA VA McLeanTotal Rewards at GDIT:\nOur benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.Our Identity Verification Process:\nAs part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes.About Our Work:\nWe are GDIT. A global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development.Join our Talent Community to stay up to date on our career opportunities and events atgdit.com/tc.\nEqual Opportunity Employer / Individuals with Disabilities / Protected Veterans","description_format":"text","description_chars":7674,"description_truncated":false,"requirements":{"experience_years_min":6,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":true,"languages":[]},"benefits":["401k plan","Growth opportunities"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["National Security","Digital Government","IT Consulting & Digital Transformation","Systems Integrators"],"lifecycle":[{"event":"open","at":"2026-10-20T07:22:35Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 21 · green card filings: 4","filings_12m":21,"filings_prev_12m":30,"green_card_filings_12m":4,"median_offered_wage_usd":154900,"route":null,"cap_exempt":false,"checked_at":"2026-10-15T11:24:14+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)","US Department of Labor: PERM disclosure data (green cards)"],"filings_for_role_12m":15}],"liveness":{"score":62,"band":"ok","label":"Likely open","p_open":1,"p_active":0.831,"p_room":0.75,"age_days":7,"expected_fill_days":10,"reasons":["conf:6","velocity","win:late","comp:brand"],"computed_at":"2026-10-22T06:10:10Z"},"pay":{"stated_usd_annual":190900,"is_top_pay":true},"html_url":"https://alion.io/job/general-dynamics-information-technology-senior-software-engineer-tssci-with-polygraph","json_url":"https://alion.io/job/general-dynamics-information-technology-senior-software-engineer-tssci-with-polygraph.json","meta":{"generated_at":"2026-10-22T18:05:43Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":461,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-23T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":4418},"rest":"https://alion.io/mcp/rest/get_company?id=4418"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fgeneral-dynamics-information-technology-senior-software-engineer-tssci-with-polygraph"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fgeneral-dynamics-information-technology-senior-software-engineer-tssci-with-polygraph"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fgeneral-dynamics-information-technology-senior-software-engineer-tssci-with-polygraph"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/general-dynamics-information-technology-senior-software-engineer-tssci-with-polygraph\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fgeneral-dynamics-information-technology-senior-software-engineer-tssci-with-polygraph"}]}