Principal Full Stack Software Engineer
GDIT· Defense IT· Oct 26, 2026 · 1d ago
Arlington, VA
In office
Full-time
Principal
$141K–$191K
8+ years exp
Job description
Type of Requisition:
Pipeline
Clearance Level Must Currently Possess:
Top Secret/SCI
Clearance Level Must Be Able to Obtain:
Top Secret SCI + Polygraph
Public Trust/Other Required:
None
Job Family:
Data Science and Data Engineering
Job Qualifications:
Skills:
Amazon Web Services (AWS), Application Development, Machine Learning (ML) Certifications:
None Experience:
8 + years of related experience US Citizenship Required:
Yes
Job Description:
YOUR IMPACT
Own your opportunity to work with the largest government agency in the nation. Make an impact by advancing the Department of War’s mission to keep our country safe and secure.
OUR COMPANY
Iron EagleX (IEX), a wholly owned subsidiary of General Dynamics Information Technology (GDIT), delivers agile IT and Intelligence solutions. Combining small-team flexibility with global scale, IEX leverages emerging technologies to provide innovative, user-focused solutions that empower organizations and end users to operate smarter, faster, and more securely in dynamic environments.
JOB DESCRIPTION
Iron EagleX is seeking a Principal Full Stack Software Engineer (Agentic AI focused) to support our AI team in Crystal City, VA. This role will design, deploy, and sustain critical components of our AI analytics stack, including analytic frontends, production APIs, interfaces between AI workflow components, and the underlying data layer.
MEANINGFUL WORK AND PERSONAL IMPACT
As a Principal Full Stack Software Engineer, you will be a core member of the AI team responsible for prototyping, building, and delivering critical data analytics capabilities. You will help translate emerging AI and machine learning concepts into reliable, user-focused software solutions that support mission outcomes.
JOB DUTIES (INCLUDE BUT ARE NOT LIMITED TO)
Develop clean, maintainable, and efficient Python code while adhering to best practices and coding standards.
Lead the technical design and implementation of AI-enabled web applications and analytics using Streamlit, React, or similar technologies.
Integrate modern AI and large language model capabilities into applications and workflows, including prompting, tool calling, retrieval-augmented generation (RAG), and related patterns.
Design, develop, and integrate APIs, including FastAPI-based services, to enable seamless communication between systems.
Build and maintain user interfaces that make complex AI, data, and analytics capabilities accessible to end users.
Establish and maintain CI/CD pipelines and container-based deployments using tools such as Docker to support repeatable builds and reliable releases.
Work with relational databases such as PostgreSQL and MySQL to ensure data integrity, performance, and efficiency.
Implement and maintain version control using Git to streamline collaboration and code management.
Collaborate with cross-functional teams to define, design, develop, test, and deliver new features.
Contribute to all stages of the software development life cycle, from concept and design through testing, deployment, and sustainment.
REQUIRED SKILLS
Proficiency in writing clean, maintainable, and efficient Python code.
Experience building AI-enabled web applications, analytic dashboards, or user workflows using Streamlit or similar technologies.
Strong knowledge of web technologies, containerization, RESTful APIs, and user interface development.
Experience designing and maintaining scalable backend solutions using Python frameworks.
Familiarity with relational database systems such as PostgreSQL and MySQL.
Proficiency with Docker; Kubernetes experience is a plus.
Proficiency with Git-based version control and collaborative software development workflows.
Hands-on experience with full stack development and a strong understanding of the software development life cycle.
DESIRED SKILLS
Experience developing modern front-end applications using React.
Hands-on experience designing or developing LLM-powered agentic workflows that use tool calling, structured outputs, task planning, and multi-step execution.
Familiarity with component-based UI development, state management, and reusable front-end design patterns.
Experience integrating React-based frontends with RESTful APIs or Python-based backend services.
Experience supporting AI, machine learning, data analytics, or mission-focused software applications.
Familiarity with cloud-native application development, DevSecOps practices, or secure software delivery environments.
Experience implementing reliable AI workflows with validation, error handling, retries, logging, and fallback strategies.
Understanding of MLOps concepts, including model registry/versioning, reproducible environments, and CI/CD for ML-enabled systems.
WHAT YOU’LL NEED TO SUCCEED
Clearance: Current TS/SCI Clearance with active or ability to obtain CI Polygraph is required
Experience: 8 years of related experience
Education: Bachelor’s degree in Computer Science, Software Engineering, or a related field (or equivalent experience)
Role requirements: Work is onsite in Crystal City, VA with optional CONUS travel
Due to US Government Contract Requirements, only US Citizens are eligible for this role
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, competitive pay and paid time off
Community: Award-winning culture of innovation and a military-friendly workplace
OWN YOUR OPPORTUNITY
Explore a career at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your passion for the mission and delivering results. #iexjobs #iexpriority
Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans
The likely salary range for this position is $140,821 - $190,523. 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:
10-25%
T elecommuting Options:
Onsite
Work Location:
USA VA Arlington
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 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 at gdit.com/tc .
Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans
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Keywords to mirror
awsmachine learningmlagileaipythonreactci/cddockerkubernetesllm
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Benefits
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Dental
Vision
401k
401(K)
Paid Time Off
Wellness