Software Engineer 3

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Software Engineering Job Qualifications: Skills: Docker Container, Linux, Python (Programming Language) Certifications: None Experience: 8 + years of related experience US Citizenship Required: Yes Job Description: SOFTWARE ENGINEER PRINCIPAL Transform technology into opportunity as a Software Engineer Principal at GDIT. Shape what’s next for mission-critical government projects while shaping what’s next for your engineering career. MEANINGFUL WORK AND PERSONAL IMPACT The Software Engineer shall design, develop, deploy, and support Retrieval-Augmented Generation (RAG) solutions within a high-performance computing (HPC) Linux environment. The successful candidate will have hands-on experience with Large Language Models (LLMs), LLM orchestration frameworks, knowledge retrieval systems, embedding models, and containerized applications. Candidates must be proficient in Python, Kubernetes, Helm, CI/CD automation, and secure SI system development, with the ability to deliver scalable, production-ready SI solutions in mission-critical environments. WHAT YOU’LL NEED TO SUCCEED Bring your engineering expertise along with a drive for innovation to GDIT. The Software Engineer Principal must have: ● Education: Bachelor of Science ● Experience: 8+ years of related experience ● Security clearance level: TS/SCI w/ Polygraph Position Required Skills Proven experience working in Linux environments, including advanced use of the Linux command-line interface (CLI) for development, troubleshooting, and system administration Recent hands-on software development experience using Python, with a strong understanding of modern software engineering practices and frameworks Experience with containerization technologies, such as Docker, Podman, and containerd, for application packaging, deployment, and lifecycle management Experience designing, authoring, and deploying Helm charts to manage Kubernetes-based applications and services Experience developing, testing, deploying, and supporting containerized applications in production environments. Experience creating, configuring, and managing Kubernetes resources, including Deployments, Services, ConfigMaps, Secrets, Ingresses, and Operators Working knowledge of Generative SI technologies, including Large Language Models (LLMs), Retrieval-Augmented Generation (RAG) architectures, embedding models, and vector databases Experience implementing and maintaining CI/CD pipelines using tools such as GitLab CI/CD, Flux CD, GitLab Runners or similar tools Experience leveraging observability, metrics, logging, and monitoring solutions including Prometheus and Grafana Proficiency with Git-based source control workflows, including branching strategies, code reviews, pull/merge requests, and collaborative development practices Understanding of software development lifecycle (SDLC) best practices, including automated testing, security scanning, code quality analysis, and DevSecOps principles Position Desired Skills Familiar with developing, deploying, troubleshooting, and sustaining mission applications in an AWS Cloud environment Experience with the Atlassian suite of tools including Confluence and Jira Experience working with, and debugging, GPU-enabled applications Experience using a machine-learning framework (PyTorch, TensorFlow, etc) Experience with other ML pipelines/frameworks like KubeFlow, NeMo, PyTorch Lightning, etc. Experience working with and debugging GPU-enabled applications Experience with SQL, Elasticsearch, and Vector databases Knowledge of SI inferencing solutions such as Nvidia NIM/TRITON, vLLM, and direct deployment (e.g. Ray) GDIT IS YOUR PLACE At 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 workplace OWN YOUR OPPORTUNITY Explore a career in software development at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your dedication to advancing innovation. #MD_2026Alumni #IntelligenceEngineered The likely salary range for this position is $175,950 - $238,050. 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: 40 Travel Required: None T elecommuting Options: Onsite Work Location: USA MD Annapolis Junction Additional 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 em