Senior .Net developer (Secret Clearance)
Stafford, Virginia
Experience: 3
Category: Information Technology
Contractor Work Model: Hybrid
Brand: System One
Job ID: 382527
Date Posted: 10/28/2026
Shortcut: http://jobs.systemone.com/mgPmaw
.NET Web Application Developer
FBI Virtual Academy
Mostly remote – 1 day/month onsite in Quantico, VA
Secret Clearance required
Must be able to obtain Top Secret
RESPONSIBILITIES:
• Design and Develop .NET based web application functionality using C# and MVC
• Build web applications using JavaScript, JQuery and other client-side technologies such as Vue JS
• Design and develop applications using agile development and SCRUM processes
• Research problems discovered by QC or product support and provide acceptable problem resolution
MUST HAVES:
• 4+ years of experience with developing ASP.NET–based applications
• 4+ years of experience with developing applications using C#
• 4+ years of experience with object–oriented design and development
• 4+ years of experience with using .NET MVC
• 2+ years of experience with Microsoft SQL Server
• Experience with .NET 4.5 and 5.0 framework
• Expert with abstraction, advanced techniques, best practices, and design patterns
• Expert with client-side technologies, including HTML, JavaScript, JQuery, and Ajax
• BA or BS in related field desired
ADDITIONAL QUALIFICATIONS:
• Experience with React, AngularJS, and VueJS
• Experience with Blazor is highly desired
• Ability to collaborate and work well with others
System One, and its subsidiaries including Joulé, ALTA IT Services, and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.
#M1
#LI-VH1
Ref: #850-Rockville (ALTA IT)
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⚠️ Protecting Job Seekers from Identity Scams
At System One, your privacy and security are important to us. As job-related scams continue to target job seekers, we want to help you recognize and avoid common recruitment fraud. Identity theft scams often involve individuals, also known as "scammers," posing as recruiters or employers to obtain sensitive personal information, such as Social Security numbers, bank account details, or copies of driver’s licenses, with the goal of stealing identities, accessing financial accounts, or creating fraudulent accounts in a victim’s name.