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Senior Asp Net Developer Jobs in Reston, VA (NOW HIRING)

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Senior NET Developer

Arlington, VA · On-site

$140K - $160K/yr

Marathon TS is seeking a Senior .Net Application Developer to support the critical mission of the ... NET languages (primarily ASP.NET, C#, and LINQ), technologies (MVC, Entity Framework, Unity), and ...

Senior .NET Developer

Washington, DC · On-site

$62.25 - $79.25/hr

NET Developers to support a complex application in the Washington D.C. area. The right candidate ... NET Web apps Experience developing/working with the following: ASP.Net, C# JavaScript, JQuery ...

We offer an excellent compensation package Job details mentioned below C# ASP.NET Developer 12 ... Net., C# Experience with Microsoft SQL Experience with Windows event logging Must be a self-starter.

SR .NET DEVELOPER

Bethesda, MD · On-site

$58.75 - $75/hr

The experienced.NET Developer is a member of the project team who takes responsibility for ... NET and ASP.Net code based on requirements defined in use cases. Develop Object Oriented code and ...

SR .NET DEVELOPER

Bethesda, MD · On-site

$58.75 - $75/hr

The experienced.NET Developer is a member of the project team who takes responsibility for ... NET and ASP.Net code based on requirements defined in use cases. Develop Object Oriented code and ...

Senior .Net Developer

Washington, DC · On-site

$62.25 - $79.25/hr

Senior .NET Developer Employment Type: Onsite Annexa is currently supporting D.C. Government ... ASP .NET. * 11+ years of experience with database technologies, development methodologies, and ...

Company Description Position: ASP.NET/VB.NET Developer Terms: 6 month contract to hire Pay Rate: $53 Salary Conversion: $98-102k/yearly Interview Availability: Next Monday, Tuesday, and Wednesday ...

.Net Developer

Mclean, VA · On-site

$48.75 - $64.50/hr

Five (5) + years of experience using Microsoft technologies including ASP.NET 4.0, C#/VB.NET and ... Additional Information Thanks & Regards Preeti Nahar Sr. Talent & Client Acquisition Specialist 360 ...

Senior .Net Developer

Alexandria, VA · On-site

$135K - $160K/yr

The Senior .NET Developer will also contribute to application architecture, technical design, code ... C#, ASP.NET Core, and current supported versions of .NET.Develop scalable, maintainable, and ...

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Infographic showing various Senior Asp Net Developer job openings in Reston, VA as of September 2026, with employment types broken down into 1% Internship, 1% As Needed, 86% Full Time, 9% Part Time, and 3% Contract. Highlights an 85% Physical, 5% Hybrid, and 10% Remote job distribution.

Senior NET Developer

Arlington, VA • On-site

Marathon TS
IT Services • 51 - 200 employees

$140K - $160K/yr

Full-time

Medical, Dental, Vision, PTO

This job post has expired 1 day ago. Applications are no longer accepted.


Job description

Marathon TS is seeking a Senior .Net Application Developer to support the critical mission of the Drug Enforcement Administration (DEA). We are developing the applications that provide the tools necessary for our drug enforcement agents and the greater law enforcement community to take illicit drugs and those who traffic them off the street. The current opioid crisis in our country is testament to the critical mission of the DEA.

Location: Arlington, VA or Merrifield, VA (5 days a week onsite)

Clearance: Active Secret clearance

Responsibilities:

  • Works in a collaborative team environment to develop and enhance code for applications built within the Concorde framework, ensuring high-quality and efficient solutions.
  • Demonstrates strong expertise in Agile development methodologies through daily activities, including sprint participation, task execution, and adherence to Agile principles.
  • Participates in meetings, discussions, and demonstrations related to the development of applications and associated data across Classified, Unclassified, and Sensitive but Unclassified environments.
  • Possesses the knowledge and capability to support non-Concorde legacy applications as needed, contributing to seamless integration and operational continuity.
  • Possesses a foundational understanding of DevSecOps principles.

Requirements:

  • Top-notch experience in Microsoft .NET languages (primarily ASP.NET, C#, and LINQ), technologies (MVC, Entity Framework, Unity), and tools (Visual Studio 2010, Team Foundation Server, ReSharper). Experience with SharePoint, NHibernate, jQuery and JavaScript, AJAX, HTML and CSS, Oracle and SQL Server databases, T4 templates, and even Classic ASP, is also desired.
  • Recent 8+ years of ASP.Net C# MVC-based web development experience using Visual Studio 2017 or higher.
  • 5+ years of .Net Core/Standard development experience.
  • 5+ years of experience with Agile development methodologies, including participation in sprints, backlog grooming, and Agile ceremonies.
  • Experience as a developer in a software environment that supported more than 10,000 users and a Relational Database Management System (RDBMS) with more than 250 tables and 1 million total rows.
  • Significant recent Java Script development experience.
  • Significant development experience with Cascading System Sheets (CSS).
  • Experience with relational data models and SQL.
  • Experience with XML and programming libraries for XML manipulation.
  • Agile project and development experience utilizing Team Foundation Server.
  • Ability to quickly deliver small projects, and to frequently transition between projects and applications.
  • Experience in packaging and delivering software and documentation to a production environment.
  • Excellent communication skills.
  • Must be a U.S. Citizen and have an active Secret clearance.
  • Applicants selected will be subject to a government security background investigation and must meet eligibility and DEA suitability requirements.

Education/Experience:

  • Bachelor's degree in Computer Science, Engineering, or a related field (14+ years of demonstrated experience may be substituted).
  • 10+ years of general experience, including 10 years of specialized and/or hands-on experience in Agile development methodologies

Company Description

Marathon TS provides a full range of professional services for clients that require support from professionals with specialized skills and experience in a specific technical area or subject matter. Marathon TS also provides IT solutions, including strategy, operations, transformation and mission support.


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About Marathon TS

Sourced by ZipRecruiter

Marathon TS provides a full range of professional services for clients that require support from professionals with specialized skills and experience in a specific technical area or subject matter. Marathon TS also provides IT solutions, including strategy, operations, transformation and mission support.

Industry

It services

Company size

51 - 200 Employees

Headquarters location

Sterling, VA, US

Year founded

2009

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