Senior Software Developer; security clearance

Type of Requisition:

Regular

None

Top Secret SCI + Polygraph

None

Software Engineering

Skills:

End-to-End Testing, Software Development Life Cycle (SDLC), Software Systems, Teamwork

Certifications:

None

Experience:

8 + years of related experience

US Citizenship

Required:

Yes

Key Skills for Success: Go
· Rust
· Systems Architecture
· Distributed Systems
· AI-Assisted Development

Own 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.

This 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 Type Script 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, Git Ops‑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.

Bring your engineering expertise and passion for innovation to GDIT. The Software Developer Sr Principal must have:

• Technical training, certifications, or a relevant degree.

• 8+ years of professional software development experience.

• 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

• 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

• Kubernetes (highly desired) and Git Ops-based delivery (Flux, Argo CD)
• Systems-level experience with C or C++
• Type Script/React UI…