JOB DETAILS

Full-Stack Developer - Mid-Senior, TS/SCI with CI Poly - $150K-$230K + 15% 401k

CompanyMillennial Software Solutions Inc
LocationFairfax
Work ModeOn Site
PostedApril 24, 2026
About The Company
Empowering Innovation in Defense & National Security Millennial Software is a trusted partner in defense technology, delivering cutting-edge software solutions, automation, DevSecOps, and AI/ML capabilities to enhance national security. Founded in 2019 by mission-driven engineers, we collaborate with government agencies and industry leaders to develop mission-critical technologies that safeguard the future. What We Do We specialize in full-spectrum software solutions for defense and aerospace, ensuring secure, scalable, and high-impact outcomes: Advanced Software Engineering – Secure, scalable solutions for mission-driven applications AI & Machine Learning – Driving automation and operational efficiency in defense environments Cybersecurity & Cloud Services – Protecting mission-critical assets with secure, resilient architectures Mission Solutions & Strategic Consulting – Optimizing defense operations through cutting-edge technology Our People Are the Difference At Millennial Software, our strength is our team. We are engineers, analysts, and innovators committed to shaping the future of defense technology. Our people-first approach fosters collaboration, continuous learning, and mission-driven excellence. Join Us We are always looking for exceptional talent and strategic partnerships to drive the next era of defense innovation. Explore our career opportunities and connect with us to learn how we can collaborate.
About the Role

Description

About Millennial Software:
Millennial Software is revolutionizing the landscape of security and defense by leveraging our core competencies in software development, automation, DevSecOps, and machine learning.

  • We are an employee-owned company, every employee receives equity in the company
  • 100% company-paid medical, dental, and vision premiums for you and all dependents
  • Ability to get increased salary if you don't need medical/dental/vision
  • 100% company-paid disability and life insurance benefits
  • 15% 401(k) company contribution
  • 30 days of PTO/holidays
  • Generous training budget
  • Paid Paternal and Maternal Leave
  • Business development / growth incentives
  • Top notch company swag

Job Description:

Clearance Level Must Currently Possess:
Top Secret SCI + CI Polygraph
 
Millennial Software is seeking a Mid-Senior Full Stack Software Developer to join our collaborative team supporting a Government customer. You’ll provide operations and maintenance support to ensure the stability, performance and continuous improvement of our new operational production software systems.

This is a great opportunity for a motivated developer to grow technical skills across the full stack, with a particular focus on modern software development processes and technologies.

The ideal candidate is passionate in the full lifecycle of application, including design, coding, testing, implementation, deployment as well as support and maintenance. The candidate must be comfortable collaborating closely with users and developers to build and maintain polished, high-performance tools in mission-critical environments.


Essential Functions:

  • Monitor, maintain and optimize production applications across the full tech stack
  • Implement and manage automated deployment pipelines and CI/CD processes
  • Investigate, report and resolve issues from problems such application bugs, patching and integration with external systems
  • Support agile development activities including sprint planning, peer code reviews, and iterative updates based on end-user feedback
  • Help maintain clean, well-documented, and testable code
  • Strong familiarity with Docker, Kubernetes, Helm
  • Strong familiarity with complied languages such as Rust, Java, and C++ and its many utilities/packages
  • Well-versed in Relational databases
  • Good understanding of Git, GitLab, CI/CD pipelines, and CM best practices

Requirements

Required Qualifications:

  • Bachelor’s degree or equivalent experience in Computer Science
  • At least 5 years’ experience in multiple languages such as JavaScript, Python, Java, Rust
  • At least 5 years’ experience in Full-stack software development (i.e. client, server, and data tiers)
  • At least 3 years’ experience with containerization and orchestration platforms such as Docker and Kubernetes
  • Strong analytical and problem solving skills with attention to detail
  • Strong understanding of development best practices, configuration management, and testing
  • Strong desire to constantly learn how new tools, frameworks, and technologies that can further the customer’s mission and provide value to the end-user
  • Ability and desire to work independently; i.e. given general tasking, develop subtasks and/or approach to satisfy task objectives 
  • Proven capability to learn new skills, adapt to shifting priorities and requirements
  • Comfortable with the Linux operating system
  • Strong communication skills and experience working with end-users and developers
  • Active TS/SCI clearance

Nice to have:

  • Strong familiarity with Svelte and/or other frontend frameworks such as Vue.js
  • Familiarity with message queue implementations, such as Kafka
  • Experience utilizing Test Driven Development

Millennial Software Solutions Inc. is an Equal Opportunity Employer and does not discriminate in employment on the basis of race, color, religion, sex, national origin, political affiliation, sexual orientation, gender identity, marital status, disability and genetic information, age, membership in an employee organization, or other non-merit factor.  

Key Skills
DockerKubernetesHelmRustRelational DatabasesGitGitLabCI/CDConfiguration ManagementJavaScriptPythonJavaFull-Stack DevelopmentContainerizationOrchestrationLinux
Categories
SoftwareTechnologyEngineeringSecurity & SafetyGovernment & Public Sector
Benefits
EquityMedical InsuranceDental InsuranceVision InsuranceDisability InsuranceLife Insurance401k ContributionPaid Time OffTraining BudgetPaternal LeaveMaternal LeaveBusiness Development Incentives
Job Information
📋Core Responsibilities
The developer will monitor, maintain, and optimize production applications across the full technology stack while implementing and managing automated deployment pipelines and CI/CD processes. Responsibilities also include investigating and resolving application issues, supporting agile development activities, and maintaining clean, well-documented, and testable code.
📋Job Type
full time
💰Salary Range
$150,000 - $200,000
📊Experience Level
5-10
💼Company Size
47
📊Visa Sponsorship
No
💼Language
English
🏢Working Hours
40 hours
Apply Now →

You'll be redirected to
the company's application page