Principal Software Engineer

About SAIC 

Science Applications International Corporation (SAIC) is a premier technology integrator delivering solutions across defense, space, civilian, and intelligence markets. Our Solutions & Technology Group (STG) is at the forefront of developing cutting-edge AI-driven capabilities that empower mission-critical operations. 

Position Overview 

SAIC's STG is seeking a talented and motivated Principal Level Software Developer to join our growing team focused on the design, development, and deployment of a next-generation Agentic AI Platform. In this role, you will contribute to building intelligent, autonomous agent frameworks and modern web applications that support complex decision-making workflows. You will work across the full development stack — from crafting intuitive front-end user experiences to building robust backend services and cloud infrastructure components. This opportunity can be worked remotely anywhere within the United States for the right candidate. 

Responsibilities 

• Design, develop, and maintain front-end web applications using modern web technologies 
• Build and style responsive, ensuring a polished and effective user experience
• Develop and maintain backend REST services and business logic to support platform capabilities and agentic AI workflows
• Contribute to the development of agentic AI components, including integration with frameworks such as LangChain, LangGraph, and LangSmith
• Support development and deployment of cloud-based services and infrastructure on AWS, leveraging tools such as OpenSearch, SageMaker, Lambda, and SQS
• Develop and maintain Infrastructure as Code (IaC) using tools such as Terraform, Packer, and Terragrunt
• Collaborate with AI/ML engineers, architects, and product owners to translate requirements into scalable, production-ready solutions 
• Support testing, debugging, and performance optimization of platform components 
• Maintain documentation for system architecture, APIs, and development processes 
• Provide feedback and mentoring to junior developers

Required

• Bachelor's degree in Computer Science, Software Engineering, or a related field and 9 years of experience or a Masters and 7 years of experience 
• Pass CompTIA Security Plus Examination within 270 Days of Employment 
• Must be a U.S. Citizen, no-dual citizenship 
• Candidates must have the ability to get a Secret Security clearance
• Experience building front-end web applications using core web technologies: HTML, CSS, and JavaScript 
• Experience developing backend services and APIs, including RESTful service design and complex business logic implementation, using languages such as Python, Java, or NodeJS 
• Strong problem-solving skills and ability to work effectively in a fast-paced, collaborative agile environment 

Preferred

• Front-End Development: Experience with HTML, CSS, JavaScript, and ReactJS for building modern, component-based web applications. Ability to effectively style and design front-end applications for usability and visual consistency 
• Backend & AI Development: Python development experience, particularly for backend service development. Hands-on experience with Agentic AI frameworks such as LangChain, LangGraph, and/or LangSmith. Familiarity with multi-agent orchestration, autonomous workflow design, or LLM integration patterns 
• Cloud & Infrastructure: Experience with AWS cloud services, including one or more of the following: OpenSearch, SageMaker, Lambda, SQS 
• Experience with Infrastructure as Code (IaC) tools, including: Terraform, Packer, Terragrunt 
• Familiarity with DevSecOps practices