Senior Software Engineer - R142

Expedition Technology•Herndon, VA

12d•Onsite

About The Position

Expedition Technology (EXP) is seeking a Senior Software Engineer to design, build, and deliver mission-critical systems for the United States Government. This role is for engineers who think beyond just writing code and understand that great systems require thoughtful architecture, maintainable software, reliable deployment pipelines, strong observability, and operational resilience. The ideal candidate is comfortable working across application development, cloud-native platforms, deployment automation, and technical leadership. EXP is an AI-enabled engineering organization that encourages the use of AI-assisted development tools like GitHub Copilot and Claude Code to improve productivity while maintaining high standards of technical judgment and code quality.

Requirements

U.S. Citizenship - must be a US citizen to fulfill clearance requirements
Active TS/SCI security clearance
Bachelor's degree in Computer Science, Engineering, or a related technical discipline
8+ years of professional software engineering experience
Expertise in one or more modern programming languages and the ability to quickly become productive in new technology stacks
Strong software engineering fundamentals independent of language or framework
Experience designing and delivering production software systems
Strong background in software architecture, system integration, and distributed systems
Experience building, deploying, and supporting containerized applications
Experience deploying and operating applications in Kubernetes-based environments
Experience building CI/CD pipelines and deployment automation solutions
Experience implementing monitoring, logging, tracing, and observability capabilities
Experience operating within cloud environments such as AWS
Strong troubleshooting, communication, and technical leadership skills

Nice To Haves

Infrastructure-as-Code experience using AWS CDK, Terraform, CloudFormation, or similar technologies
GitLab CI/CD experience
OpenTelemetry experience
Experience supporting highly available or mission-critical systems
Experience mentoring and developing engineers
Experience incorporating AI-assisted development tools into engineering workflows

Responsibilities

Design and implement scalable software systems, services, and internal tools using Python and modern engineering practices
Lead architectural decisions across application, deployment, infrastructure, and operational domains
Design systems with maintainability, security, resiliency, scalability, and observability as first-class concerns
Build and improve CI/CD pipelines and deployment automation workflows
Design, deploy, and support cloud-native applications running in containerized and Kubernetes-based environments
Establish and champion engineering best practices around testing, automation, monitoring, reliability, and software quality
Collaborate with software engineers, platform engineers, and mission stakeholders to deliver complete solutions
Troubleshoot and resolve complex issues across development, deployment, and production environments
Mentor engineers and provide technical leadership across projects and teams
Contribute to verification, validation, testing, and evaluation environments supporting mission needs