Type of Requisition:RegularClearance Level Must Currently Possess:NoneClearance Level Must Be Able to Obtain:Top Secret SCI + PolygraphPublic Trust/Other Required:NoneJob Family:Software EngineeringJob Qualifications:Skills:End-to-End Testing, Software Development Life Cycle (SDLC), Software Systems, TeamworkCertifications:NoneExperience:8 + years of related experienceUS Citizenship Required:YesJob Description:Senior Software Developer - TS/SCI with PolygraphKey Skills for Success: Go · Rust · Systems Architecture · Distributed Systems · AI-Assisted DevelopmentYour ImpactOwn your opportunity to support the nation's most critical missions. We're looking for builders — engineers with the curiosity to spot problems others have learned to live with, and the instinct to reach for the latest tools, AI included, to solve them. Put your software and architecture expertise to work designing, building, and sustaining the systems that keep sensitive operations secure, reliable, and ready, and grow your career alongside a team that values iteration and shares every improvement to lift the whole group up.Job DescriptionWe're looking for a versatile Senior Software Developer to design, build, and deliver mission-critical software for a government customer in the U.S. Intelligence Community. This is a wear-multiple-hats role for an engineer who is comfortable across the whole stack — someone who can set the architectural direction for a system and then chase a problem through it all the way down to the kernel. You'll participate across the full software development lifecycle — designing and documenting systems, writing code and automated tests, and planning and monitoring production deployments — taking ownership of what you build, from architecture and implementation through containerized build and deployment. You'll bring modern engineering practices, including AI-assisted development, to a team that values reliability and maintainability above all. People are our advantage: we invest in your growth as much as you invest in the mission.MEANINGFUL WORK AND PERSONAL IMPACTThis role designs, builds, and supports complex software systems that directly enable mission success. You will:• Architect full end‑to‑end software systems and services — defining structure, interfaces, technology choices, and making thoughtful trade-offs based on mission needs and technical constraints.• Research, design, develop, and modify enterprise software throughout the full software development lifecycle.• Create architecture diagrams, design documents, and technical patterns that guide other engineers and support long-term scalability and maintainability.• Write production-grade software primarily in Go and Rust, plus shell/Bash for automation and supporting tools. Develop automated tests to ensure ongoing reliability.• Contribute to front-end development in TypeScript and React when needed.• Use AI-assisted and agentic coding tools (e.g., Claude Code, OpenAI Codex) as part of daily development — analyzing codebases, troubleshooting production systems, and accelerating problem-solving — while applying good judgment about when human review is required.• Package, build, and deploy containerized applications in modern orchestrated, GitOps-driven environments. Plan, manage, and monitor deployments, owning the reliability of the software you ship.• Build internal tools, CLIs, and APIs that streamline development, build, and deployment workflows.• Work across the entire stack — application code, container runtime, OS, and kernel — to diagnose issues and deliver solutions within distributed, mission-critical systems.WHAT YOU’LL NEED TO SUCCEEDBring your engineering expertise and passion for innovation to GDIT. The Software Developer Sr Principal must have:• Education: Technical training, certifications, or a relevant degree.• Experience: 8+ years of professional software development experience.• Required technical skills:– Systems-level programming in Go and/or Rust– Strong Linux and shell/Bash skills, including understanding at the kernel level– Experience designing and architecting software/systems– Building secure, highly available distributed systems– Containerized software development (e.g., Docker/OCI)– Writing automated tests and using CI/CD and infrastructure-as-code– Hands-on experience with AI-assisted or agentic coding tools• Security clearance: Ability to obtain TS/SCI with Poly (We will sponsor the selected candidate if you do not already have the required clearance)• Citizenship: US citizenship required• Role requirements:– Ability to architect systems and make thoughtful technical trade-offs– Strong debugging skills in complex, distributed environments– Comfortable working across the full stack, including OS and kernel internals– Skilled at troubleshooting, hardening, and improving system reliability– Able to work independently with limited supervision– Strong communication skills– Willingness to adopt and integrate AI tools into daily engineering workflows• Preferred skills:– Kubernetes (highly desired) and GitOps-based delivery (Flux, Argo CD)– Systems-level experience with C or C++– TypeScript/React UI development– Container tooling (Docker Compose)– Renovate– Monitoring, alerting, and debugging large-scale distributed systems– Building tools and APIs– Open-source contribution or maintenanceGDIT IS YOUR PLACEAt GDIT, the mission is our purpose, and our people are at the center of everything we do.● Growth: AI-powered career tool that identifies career steps and learning opportunities● Support: An internal mobility team focused on helping you achieve your career goals● Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off● Community: Award-winning culture of innovation and a military-friendly workplaceOWN YOUR OPPORTUNITYExplore a career in software development at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your dedication to advancing innovation.#GlobalServicesThe likely salary range for this position is $161,500 - $218,500. 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:40Travel Required:Less than 10%Telecommuting Options:OnsiteWork Location:USA MD Annapolis JunctionAdditional Work Locations:Total Rewards at GDIT:Our 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:As 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:We 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.Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans