Sr. Software Developer (.NET

Senior Software Developer

Your Impact: Are you interested in using your skills to help shape the Cyber, Security, & Intel space? If so, look no further. Amentum is seeking a Senior Software Developer to join our team of passionate individuals in Fort Meade, MD. In this role you will support challenging, mission‑critical projects that make a direct impact on the Nation’s security and intelligence mission.

We are seeking Software Developers and Data Analysts with at least two years of experience in website coding, basic graphics techniques, Structured Query Language (SQL), Hypertext Markup Language (HTML), and Extensible Markup Language (XML). The Senior .NET Core Developer will be a key contributor to the development and maintenance of SENTINEL, a web‑based application used to track counterintelligence related entities and their relationships.

This role requires an exceptional developer with deep expertise in .NET Core, C#, and related technologies.

• Software Development:
  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.
• .NET Core Application Development:
  Enterprise‑level web applications utilizing .NET Core, Razor Pages, Dependency Injection, Web APIs, and HTTP request/response handling.
• Data Management:
  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.
• Development Environment & Tools:
  Daily use of Visual Studio and SQL Server Management Studio for bug fixing and new functionality development;
  Azure Dev Ops and Git for source code management, version control, and collaboration.
• Database Administration & Optimization:
  Create, modify, and delete database objects; troubleshoot and address database performance issues.
• Front‑End Development:
  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.
• Collaboration & Mentorship:
  Collaborate with other developers, analysts, and stakeholders throughout the software development lifecycle; potentially mentor junior developers and share knowledge.

• Master’s degree in a relevant field and 12 years’ relevant experience (with a portion within last 2 years), or Bachelor’s degree and 14 years of relevant experience, or Associate degree and 16 years, 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).
• Dev Ops Proficiency:
  Proficient with Azure Dev Ops and Git for source control, CI/CD, and collaboration.
• Problem‑Solving:
  Exceptional analytical and problem‑solving skills.

Current TS with SCI eligibility.

• Understanding of ASP.NET Core 6.0 and related concepts (Razor Pages, Dependency Injection, Middleware).
• Knowledge of Cascading Style Sheets (CSS) and UI layout frameworks (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 clearance.

The base salary range for this position is $143,000 to $175,000
. This range reflects the minimum and maximum target for new hire salaries for the position across all U.S. locations. Within the range, individual pay is determined by work location and additional factors, including job‑related skills, experience, and relevant education or training. Eligible employees may elect medical, dental, vision, basic life insurance; participate in the company 401(k) plan and deferred compensation plan;

receive 17 days of vacation per year, seven paid holidays, floating holidays, caregiver leave; purchase company stock; and receive a performance discretionary bonus.