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Senior Net Software Developer Jobs in Washington, DC

Marathon TS

Be Seen First

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 ... Experience as a developer in a software environment that supported more than 10,000 users and a ...

New

Jobsbridge

Senior .NET Developer

Washington, DC

$62.25 - $79.25/hr

NET Developers to support a complex application in the Washington D.C. area. The right candidate ... life-cycle software applications development (i.e., design, construction, testing, and ...

Network Designs Inc.

Senior .Net Developer

Alexandria, VA · On-site

$55.75 - $70.75/hr

This position is ideal for a hands-on software engineer who can work across the full technology ... NET.Develop scalable, maintainable, and reusable application components that support complex ...

Twenty First Systems

SR .NET DEVELOPER

Bethesda, MD

$58.75 - $75/hr

The experienced.NET Developer is a member of the project team who takes responsibility for ... Design, develop, and test software solutions primarily composed of Microsoft technologies Estimate ...

Twenty First Systems

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 ... Design, develop, and test software solutions primarily composed of Microsoft technologies Estimate ...

Annexa Inc.

Senior .Net Developer

Washington, DC

$62.25 - $79.25/hr

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

NetImpact Strategies

Senior .NET Developer

Herndon, VA · On-site +1

$56.50 - $72/hr

NetImpact Strategies is seeking a Senior .NET Developer to join our talented team supporting the ... The environment also makes extensive use of AI-assisted software development tools and AI ...

Andworx

Senior .NET Developer

Washington, DC · On-site

$110 - $160/hr

As Senior .NET Developer, you will be working on an Agile team that develops enterprise web ... Develop enterprise applications and support end-to-end software development and delivery in an ...

NetImpact Strategies

Senior .NET Developer

Herndon, VA · On-site

$56.50 - $72/hr

NetImpact Strategies is seeking a Senior .NET Developer to join our talented team supporting the ... The environment also makes extensive use of AI-assisted software development tools and AI ...

Network Designs

Senior .Net Developer

Alexandria, VA · On-site

$120 - $160/hr

This position is ideal for a hands-on software engineer who can work across the full technology ... NET. * Develop scalable, maintainable, and reusable application components that support complex ...

NetImpact Strategies

Senior .NET Developer

Herndon, VA

$56.50 - $72/hr

NetImpact Strategies is seeking a Senior .NET Developer to join our talented team supporting the ... The environment also makes extensive use of AI-assisted software development tools and AI ...

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All JobsNet Software Developer JobsSenior Net Software Developer JobsSenior Net Software Developer Jobs in Washington, DC

Senior Net Software Developer information

See Washington, DC salary details

$41

$68

$88

How much do senior net software developer jobs pay per hour?

As of Aug 28, 2026, the average hourly pay for senior net software developer in Washington, DC is $68.31, according to ZipRecruiter salary data. Most workers in this role earn between $60.00 and $76.39 per hour, depending on experience, location, and employer.

What is the difference between Senior Net Software Developer vs Software Engineer?

AspectSenior Net Software DeveloperSoftware Engineer
Required CredentialsBachelor's in CS or related field, certifications like MCSD often preferredBachelor's or higher in CS or related field, certifications vary
Work EnvironmentTypically in enterprise or corporate settings, focusing on .NET technologiesVaries from startups to large companies, working on diverse projects
Industry UsageCommon in finance, healthcare, and enterprise software sectorsWidely used across tech, finance, healthcare, and more

Both roles require strong programming skills and experience with software development. Senior Net Software Developers focus specifically on .NET frameworks and enterprise applications, while Software Engineers may work across multiple platforms and technologies. The choice depends on the specific tech stack and industry focus.

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Senior Net Software Developer jobs near you
Infographic showing various Senior Net Software Developer job openings in Washington, DC as of August 2026, with employment types broken down into 82% Full Time, and 18% Contract. Highlights an 64% In-person, 4% Hybrid, and 32% Remote job distribution, with an average salary of $142,094 per year, or $68.3 per hour.

Senior NET Developer

Marathon TS

Arlington, VA • On-site

$140K - $160K/yr

Full-time

Medical, Dental, Vision, PTO

Posted 2 days ago

New

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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.

Marathon TS logo

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

Social media

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