Software Developer, Expert
Amentum· Defense & Space· Oct 8, 2026 · 20d ago
Arlington, VA
In office
Full-time
Principal
$225K–$235K
10+ years exp
Job description
We are seeking a talented and experienced Expert Software Engineer to join our dynamic team. The ideal candidate will have over 10 years of software development experience with a strong background in cloud technologies and development, information systems, and service-oriented architectures. The role requires proficiency in full-stack development, database design, DevOps, and the ability to migrate and modernize legacy applications to the cloud.
Responsibilities:
Lead software development projects from requirements analysis through deployment and maintenance.
Design and develop software solutions, employing technologies such as Python, NodeJS, Angular, JavaScript, C#, SQL Server, Microsoft Windows Server, and Linux.
Experience with cloud technologies, migrating existing systems to the cloud, and establishing new CI/CD pipelines.
Monitor, troubleshoot, and enhance system operations using tools like Splunk and Grafana/Prometheus.
Work with Jira and Confluence for agile management.
Produce technical documentation, including system designs, Interface Control Documents (ICDs), and operational procedures.
Collaborate with cross-functional teams to reverse engineer legacy codebases and produce UML models.
Support secure communications systems, ensuring compliance with operational and security standards.
Research, prototype, and recommend improvements to existing systems and architectures.
Troubleshoot and resolve complex software, performance, and infrastructure issues.
Research and adopt emerging technologies to enhance system efficiency.
Communicate with clients on project specific activities and manage project related deliverables.
Facilitate process working groups to analyze existing processes and create new business strategies.
Requirements:
Over 8 years of hands-on software development experience.
Experience with EKS/Kubernetes or other container orchestration software.
Hands-on experience with secure systems engineering, systems integration, and reverse engineering.
Proficiency in programming languages (at least two): Python, NodeJS, Angular, JavaScript, C#, SQL.
Experience with cloud technologies. Experience working with tools like JIRA, Confluence, Splunk, and diagramming applications.
Strong skills in debugging, performance optimization, and DevOps practices.
Background in on-call support and operational monitoring of critical systems.
Clearance Required: TS/SCI w/ Poly
Minimum Education:
Bachelor’s degree in computer science, Design, or related field (or equivalent experience).
Minimum Years of Experience: 10
Preferred:
Experience with AWS. Experience with EKS or other container orchestration software. Experience with design systems and component libraries. Excellent technical writing and documentation skills. Experience in collaborating with multidisciplinary teams. Familiarity with high-availability systems and secure communications.
Other Responsibilities:
Safety - Amentum enforces a safety culture whereby all employees have the responsibility for continuously developing and maintaining a safe work environment. As appropriate, each employee is responsible for completing all training requirements and fulfilling all self-aid/buddy aid responsibilities, participating in emergency response tasks and serving on safety committees and teams.
Quality - Quality is the foundation for the management of our business and the keystone to our goal of customer satisfaction. It is our policy to consistently provide services that meet customer expectations. Accordingly, each employee must conform to the Amentum Quality Policy and carry out job activities in compliance with applicable Amentum Quality System documents and customer contracts. Each employee must read and understand his/her Quality Management and Customer Satisfaction responsibilities.
Procedure Compliance - Each employee must read, understand and implement the general and specific operational, safety, quality and environmental requirements of all plans, procedures and policies pertaining to his/her job. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status.
#javelin
Compensation Details:
$225,000.00 - $235,000.00
The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.
Benefits Overview:
Our health and welfare benefits are designed to support you and your priorities. Offerings include:
Health, dental, and vision insurance
Paid time off and holidays
Retirement benefits (including 401(k) matching)
Educational reimbursement
Parental leave
Employee stock purchase plan
Tax-saving options
Disability and life insurance
Pet insurance
Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.
Original Posting:
10/08/2026 - Until Filled Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.
Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters .
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Keywords to mirror
pythonnodejsangularjavascriptsqlci/cdjiraagilekubernetesawsdesign systems
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Benefits
Benefits detected in the listing.
Dental
Vision
401(K)
Paid Time Off
Parental Leave