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# Software Engineer Senior

- **Company:** Science Applications International Corporation
- **Location:** Ashburn, VA, United States (Remote available)
- **Experience:** Expert
- **Salary:** $120,001.0 - $160,000.0
- **Contract:** Permanent contract
- **Skills:** LangGraph Framework, HTML, Java (Programming Language), JavaScript (Programming Language), Application Programming Interfaces (APIs), Agile Methodology, Artificial Intelligence, Amazon Web Services, Component-Based Software Engineering, Business Logic, Cascading Style Sheets (CSS), Cloud Computing, CompTIA Security+, Software Debugging, Design of User Interfaces, Human-Computer Interaction, Infrastructure as a Service (IaaS), Python (Programming Language), Node.Js, Performance Tuning, Cloud Services, Service Design, Service Development Studio, Software Engineering, Systems Architecture, Web Applications, Workflow Management Systems, LangChain, ReactJS, Multi-Agent Systems, Infrastructure as Code (IaC), Backend, Agentic-AI, SC Clearance, LangSmith, Infrastructure Automation Frameworks, Information Technology, Front End Software Development, Restful APIs, Amazon Simple Queue Service (SQS), Terraform, Devsecops, OpenSearch
- **Published:** October 31, 2026
- **Apply:** https://www.careerbuilder.com/job-details/software-engineer-senior-ashburn-va--d3659591-72cd-4986-8eef-18cf6541dd52

## About the Role

Software Engineering, Software Engineering, Secret Clearance, Work From Home, Artificial Intelligence (AI), Technical Delivery, Software Development, User Interface/Experience (UI/UX), Infrastructure as a Service (IaaS), Backend as a Service (BaaS), * Education: Bachelor''s degree in Computer Science, Software Engineering, or a related field and 5 years of experience or Masters and 3 Years of experience

 * Experience: 5-8 years of professional software development experience
 * Pass CompTIA Security Plus Examination within 270 Days of Employment
 * Must be a U.S. Citizen, no-dual citizenship
 * 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 Qualifications

 * 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

## Description

SAIC''s STG is seeking a talented and motivated Senior 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 in 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