Amentum · 21 hours ago
Sr. Software Developer (.NET)
Fort Meade, MD
Full-time
Onsite
Senior Level, Lead/Staff
$143K/yr - $175K/yr
10+ years expAmentum is seeking a Senior Software Developer to join their team of passionate individuals. In this role, you will support mission-critical projects that directly impact the Nation’s security and intelligence mission, focusing on the development and maintenance of a web-based application used for counterintelligence.
Mechanical EngineeringSecurityTechnical Support
No H1B
Security Clearance RequiredU.S. Citizen Only
Responsibilities
Develop new, cutting-edge software solutions for SENTINEL utilizing strong C# programming skills
Maintain and enhance existing functionality within the SENTINEL application
Contribute to the design and architecture of new features and components
Develop enterprise-level web applications utilizing .NET Core, Razor Pages, Dependency Injection, Web APIs, and HTTP request/response handling
Utilize Entity Framework (EF) Core, Code First, Migrations, and LINQ syntax to manage data interactions with SQL Server, including data insertion, querying, updating, and deletion
Daily use of Visual Studio and SQL Server Management Studio for bug fixing and new functionality development
Daily use of Azure DevOps and Git for source code management, version control, and collaboration
Utilize a strong understanding of SQL Server and relational database principles to create, modify, and delete database objects
Troubleshoot and address database performance issues
Possess exceptional JavaScript development skills
Implement AJAX calls, form validation, DOM manipulation, and interactivity using JavaScript
Style web applications utilizing CSS and UI layout frameworks such as Bootstrap 5 to create visually appealing and consistent user interfaces
Collaborate with other developers, analysts, and stakeholders throughout the software development lifecycle
Potentially mentor junior developers and share knowledge
Qualification
Required
Master's degree in a relevant field and 12 years' relevant experience; with a portion of the experience within the last 2 years, or
Bachelor's degree and 14 years of relevant experience, or
Associate degree and 16 years of relevant, or
High school diploma and 20 years of relevant experience
Security Plus certified
10+ years of professional software development experience with a strong focus on .NET technologies
.NET Core Expertise: Deep understanding and practical experience with .NET Core development
C# Proficiency: Exceptional C# programming skills with a thorough understanding of object-oriented programming principles
EF Core & SQL Server: Extensive experience with Entity Framework Core, Code First, Migrations, and SQL Server
JavaScript & Front-End Technologies: Solid understanding of JavaScript, HTML, CSS, and modern front-end frameworks (e.g., Bootstrap)
DevOps Proficiency: Proficient with Azure DevOps and Git for source control, CI/CD, and collaboration
Problem-Solving: Exceptional analytical and problem-solving skills
Current TS with SCI eligibility
Preferred
Understanding of ASP.NET Core 6.0 and related concepts to include Razor Pages, Dependency Injection and Middleware
Knowledge of Cascading Style Sheets (CSS) and UI layout frameworks (i.e. Bootstrap, Flexbox, etc)
Experience reverse engineering legacy source code to implement priority bug fixes and enhancement requests
Working knowledge of IIS and Web application deployments
TS/SCI
Benefits
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
Company
Amentum
Amentum is a technology and engineering company for security, defense, and energy.
10001+ employees
Funding
Current Stage
Public CompanyTotal Funding
$321.16M2025-03-12Post Ipo Secondary· $321.16M
2024-09-27IPO
2020-01-01Private Equity
Leadership Team
Ajay Nagar
Vice President
Darren Burton
Chief People Officer
Recent News
2025-12-29
Washington Technology
2025-12-20
2025-12-09
Company data provided by crunchbase