Sr. Software Developer

Amentum; Chantilly (VA); On-site; USD 190,000 - 220,000; Full time

Benefits offered by this job

Health, dental, and vision insurance

Paid time off and holidays

Retirement benefits (including 401(k) matching)

Educational reimbursement

Employee stock purchase plan

Disability and life insurance

Pet insurance

Job summary

Amentum is seeking a talented and experienced Senior Software Engineer in Chantilly, Virginia. The ideal candidate will possess over 10 years of software development experience, specifically in cloud technologies, and service-oriented architectures. As a Senior Software Engineer, you will be instrumental in designing and developing complex software solutions, ensuring the deployment and orchestration of workloads on Kubernetes, and optimizing cloud infrastructure.

The role requires a strong background in full-stack development, DevOps practices, and proficiency with tools like Python, NodeJS, and AWS. A commitment to quality and safety within the workplace is paramount.

Qualifications

• Over 10 years of hands-on software development experience.
• Proficiency in at least two programming languages.
• Background in on-call support and operational monitoring of critical systems.

Responsibilities

• Design and develop software solutions employing various technologies.
• Implement and manage cloud infrastructure using IaC tools.
• Troubleshoot and resolve complex software and performance issues.

Skills

Python

NodeJS

Angular

JavaScript

C#

SQL

DevOps

Cloud technologies

Education

Bachelor’s degree in Computer Science

Tools

JIRA

Confluence

AWS

Job description

Purpose and Impact:

We are seeking a talented and experienced Senior 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.

Work Schedule: M- F 40 hours a week

Essential Responsibilities:

• Design and develop software solutions, employing technologies such as Python, NodeJS, Angular, JavaScript, C#, SQL Server, Microsoft Windows Server, and Linux.
• Deploying, maintaining, and troubleshooting EKS clusters, ensuring high availability and performance for applications.
• Deploying and orchestrating workloads on Kubernetes, utilizing deployment strategies like rolling updates and canary releases.
• Implementing and managing cloud infrastructure using IaC tools like AWS CloudFormation or CDK.
• Designing and building CI/CD pipelines (using tools like Jenkins, GitHub Actions, or ArgoCD) for seamless and automated application delivery to EKS clusters.
• Integrating observability tools such as Prometheus, Grafana, Datadog, or Amazon CloudWatch to monitor application and cluster performance, troubleshoot complex issues, and optimize costs.
• Implementing robust security frameworks, including IAM roles, Kubernetes RBAC policies, and vulnerability scanning solutions.
• Work with Jira and Confluence for agile management.
• 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.

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.

As part of our commitment to maintaining a safe and compliant work environment, Amentum is a drug-free workplace and requires all personnel to comply with company drug and alcohol policies as a condition of employment. Employment is contingent upon successful completion of the drug screening process. Please note that this may include pre-hire screening for marijuana, as well as other federally controlled substances due to Amentum’s role as a federal contractor and trusted partner to the US Government.

Minimum Requirements (Knowledge, Skills, and Abilities):

• Over 10 years of hands-on software development experience.
• 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 with Poly

Minimum Education:

• Bachelor’s degree in Computer Science, Design, or related field (or equivalent experience).

Minimum Years of Experience:

• 10

Preferred Qualifications:

• Experience with design systems and component libraries.
• Experience with AWS.
• Experience with EKS or other container orchestration software.
• Excellent technical writing and documentation skills.
• Experience in collaborating with multidisciplinary teams.
• Familiarity with high-availability systems and secure communications.

#javelin

Compensation Details:

$190,000 to $220,000

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:

03/06/2026 - 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.