Senior Software Engineer/Tech Lead - R142

Expedition Technology
vision insurance, parental leave, paid holidays, tuition reimbursement, 401(k), profit sharing
United States, Virginia, Herndon
13865 Sunrise Valley Drive (Show on map)
Aug 27, 2026
Are you an engineer who enjoys owning the complete solution, from architecture and software design to deployment, observability, and operational excellence? At Expedition Technology (EXP), we're looking for a Senior Software Engineer/Tech Lead to help design, build, and deliver mission-critical systems supporting the United States Government. This role is for engineers who think beyond writing code. Successful candidates understand that great systems require thoughtful architecture, maintainable software, reliable deployment pipelines, strong observability, and operational resilience. You are comfortable moving between application development, cloud-native platforms, deployment automation, and technical leadership as mission needs evolve. EXP is an AI-enabled engineering organization. We encourage engineers to leverage modern AI-assisted development tools such as GitHub Copilot, Claude Code, OpenCode, and similar technologies as part of their daily workflow. Successful candidates should be comfortable using these tools to improve productivity while maintaining strong technical judgment, code quality, and ownership of delivered solutions. What You'll Do: 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 Skills and Experience You Bring: 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 Preferred Qualifications: 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 Who is Expedition Technology? Expedition Technology (EXP) designs, develops, and delivers innovative solutions with national impact for the defense and intelligence communities. We use machine learning, artificial intelligence, and other advanced algorithms, platforms, and technologies to solve our customers' most complex, demanding and urgent C4ISR challenges. Our culture promotes individual growth and opportunity, prioritizes a collaborative team spirit, and invites the intellectually curious to solve challenging problems creatively. Headquarted in Northern Virginia's high-tech corrdor, EXP is a rapidly growing, privately held company that pushes the boundaries of what is possible every day. To learn more about EXP and discover why we are an award-winning workplace, visit our web site and follow us on LinkedIn. Interested in joining our team? Let's explore together. Join Our Team and Enjoy Exceptional Benefits! Expedition Technology (EXP) offers a flexible, self-directed benefits package that is designed to fit your individual needs. Here's a glimpse of the outstanding benefits you can enjoy when you join our team: Company-paid medical, dental, and vision insurance Generous Time Off: Enjoy 11 paid holidays, up to 34 days of PTO Robust 401(k) Plan: Benefit from up to a 12% company contribution, including a 3% safe harbor, 6% match, and up to 3% additional as a form of profit sharing. Student Loan Repayment: Take advantage of our unique option to reallocate a portion of your 401(k) match funds to repay student loans, helping you achieve financial freedom faster. Paid Parental Leave: Six weeks of paid leave for the primary caregiver and 2 weeks of paid leave for the secondary caregiver for you to bond with your new family member. Tuition Reimbursement: Pursue further education with up to $5,250/year available to support your continuous learning and growth. Referral Bonus Program: Earn rewards for bringing talented individuals into our team. Exclusive Entertainment Perks: Enjoy free tickets to sporting events, theater, concerts, and more, adding fun and excitement to your life. Onsite Amenities: Stay fit and healthy with our free, onsite fitness center, active workstations featuring treadmill and bike desks, and enjoy our onsite cafeteria with reduced-cost options. Inspiring Work Culture: Thrive in a collaborative, creative, and supportive culture where you are encouraged to push boundaries, take risks, and enjoy the rewards. Join us and be part of a team that values your well-being and professional growth. Apply today and take the first step towards a fulfilling career with us! EXP is proud to be an Equal Opportunity Employer that believes a diverse range of talent creates an environment that fosters creativity and innovation. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, age, disability, national origin, genetic information, or protected veteran status.