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Professional Senior Net Software Developer Jobs in Washington, DC

Marathon TS

Be Seen First

Senior NET Developer

Arlington, VA · On-site

$140K - $160K/yr

Experience as a developer in a software environment that supported more than 10,000 users and a ... of professional services for clients that require support from professionals with specialized ...

Jobsbridge

Senior .NET Developer

Washington, DC

$62.25 - $79.25/hr

T staffing and professional services company specializing in Web, Cloud & Mobility staffing ... NET Developers to support a complex application in the Washington D.C. area. The right candidate ...

Network Designs Inc.

Senior .Net Developer

Alexandria, VA · On-site

$135K - $160K/yr

This position is ideal for a hands-on software engineer who can work across the full technology ... An equivalent combination of education, training, certifications, and relevant professional ...

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 · On-site

$62.25 - $79.25/hr

This is a professional position which may require subject matter expertise consistent with ... 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 ... professional software development experience, including significant experience developing and ...

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 ... professional software development experience, including significant experience developing and ...

Network Designs

Senior .Net Developer

Alexandria, VA · On-site

$58.75 - $74.75/hr

This position is ideal for a hands-on software engineer who can work across the full technology ... An equivalent combination of education, training, certifications, and relevant professional ...

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 ... professional software development experience, including significant experience developing and ...

Revolutional, LLC

Senior .NET Developer

Washington, DC

$115/hr

NET Developer that will be responsible for delivering high-quality, maintainable software across ... NET. * Write and optimize SQL Server database objects, including T-SQL queries, stored procedures ...

Revolutional, LLC

Senior .NET Developer

Mclean, VA · On-site

$115/hr

NET Developer that will be responsible for delivering high-quality, maintainable software across ... NET. * Write and optimize SQL Server database objects, including T-SQL queries, stored procedures ...

Workila

Senior .NET Developer

Mclean, VA

$55.50 - $70.75/hr

The Senior Developer position requires the ability to provide hands-on development skills ... Bachelor's degree in computer science, management information systems (MIS), software engineering ...

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Professional Senior Net Software Developer information

See Washington, DC salary details

$41

$68

$88

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

As of Sep 9, 2026, the average hourly pay for professional senior net software developer in Washington, DC is $68.18, according to ZipRecruiter salary data. Most workers in this role earn between $59.90 and $76.25 per hour, depending on experience, location, and employer.

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

AspectProfessional Senior Net Software DeveloperSoftware Engineer
CredentialsTypically requires a bachelor’s degree in computer science or related field; certifications like MCSD or Microsoft Certified: Azure Developer are commonUsually holds a bachelor’s degree in computer science or engineering; certifications vary but may include similar technical credentials
Work EnvironmentWorks primarily in Microsoft-based environments, developing .NET applications, often in enterprise settingsWorks across various platforms and technologies, including web, mobile, and desktop applications, in diverse industries
Employer & Industry UsageCommonly employed in IT firms, corporations, and government agencies focusing on Microsoft technologiesFound in tech companies, startups, and large enterprises across multiple sectors

While both roles involve software development, the Professional Senior Net Software Developer specializes in Microsoft .NET technologies and enterprise solutions, whereas a Software Engineer has a broader scope across different platforms and technologies. The choice depends on the specific technical focus and industry requirements.

What are the most commonly searched types of Senior Net Software Developer jobs in Washington, DC?

The most popular types of Senior Net Software Developer jobs in Washington, DC are:

Professional Senior Net Software Developer jobs near you

Senior NET Developer

Arlington, VA • On-site

Marathon TS
IT Services • 51 - 200 employees
Learn more about Marathon TSexternal

$140K - $160K/yr

Full-time

Medical, Dental, Vision, PTO

Posted 14 days ago

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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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