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Senior Net Core Developer Jobs in Washington, DC

Omni Inclusive

.Net Application Developer

Reston, VA · On-site

Senior.NET Developer Our client is seeking a senior.NET developer responsible for building .NET applications using the latest technological stack of.NET core/.NET 6, ASP.NET MVC, C#, HTML5, Vue.Js ...

Jobsbridge

Senior .NET Developer

Washington, DC

$62.25 - $79.25/hr

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. The client seeks senior ..NET Developers to support a complex application in ...

Keylent Inc

Tech Lead - .NET Core Developers

Washington, DC · On-site

$66.75 - $87.50/hr

NET Core Developers Experience of 8 years + Experience in working in MS Dynamics customization using C # Develop overall technical strategies for external client projects from technical requirements ...

Samprasoft

(DOT) Sr .NET-Azure consultant

Washington, DC · On-site

$62.25 - $77.25/hr

Net Core * Experience in writing Rest APIs & Swagger * Experience in Entity Framework core * 6+ ... Intermediate level experience in using CICD and DevOps * Some UI frameworks like Angular, React or ...

Annexa Inc.

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 ... NET. * 11+ years of experience with database technologies, development methodologies, and ...

Saxon Global

Azure Software Developer

Washington, DC · On-site

Azure Software Developer The Azure Software Developer will be responsible for designing, developing ... NET Core, and the.NET Framework across multiple layers of the stack * Implement secure, scalable ...

Twenty First Systems

SR .NET DEVELOPER

Bethesda, MD · On-site

$58.75 - $75/hr

NET Developer is a member of the project team who takes responsibility for implementing parts of the system architecture using best practices in an agile development environment. This will include ...

Twenty First Systems

SR .NET DEVELOPER

Bethesda, MD

$58.75 - $75/hr

NET Developer is a member of the project team who takes responsibility for implementing parts of the system architecture using best practices in an agile development environment This will include ...

JCD Staffing

Senior .NET Developer

Alexandria, VA · On-site

$58.75 - $75/hr

Senior .NET Developer Location: Alexandria, VA Work Schedule: Onsite 5 days per week Employment ... NET Framework, .NET Core, Angular, SQL Server, and API development . The ideal candidate will have ...

Network Designs Inc.

Senior .Net Developer

Alexandria, VA · On-site

$125K - $135K/yr

Founded in 1985, NDi's firmly defined core values have driven all aspects of the business, which ... The Senior .NET Developer's responsibilities include participating in the entire software ...

Pae

Software Developer - Senior

Fort George G Meade, MD

$60.50 - $79.75/hr

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 ...

New

kgs

Senior .Net Full-Stack Developer

Washington, DC · On-site

Kadiak, LLC, a Koniag Government Services company, is seeking a Senior Net Full-Stack Developer with a Top-Secret security clearance to support Kadiak and our government customer in Washington, DC.

kgs

Senior .Net Full-Stack Developer

Washington, DC · On-site

Kadiak, LLC, a Koniag Government Services company, is seeking a Senior Net Full-Stack Developer with a Top-Secret security clearance to support Kadiak and our government customer in Washington, DC.

Evolver Federal

Senior .NET Developer

Washington, DC · On-site

$135K - $165K/yr

Evolver is seeking a Senior .NET Developer to support the work and projects of our client in ... Net Core and above * Experience with Test Driven Development (TDD) * Must be able to pass a USCP ...

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Senior Net Core Developer information

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$41

$68

$88

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

As of Jul 2, 2026, the average hourly pay for senior net core 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 a Senior .NET Core Developer?

A Senior .NET Core Developer is an experienced software engineer who specializes in building web applications, APIs, and other software solutions using Microsoft's .NET Core framework. They are responsible for designing, coding, testing, and maintaining high-performance and scalable applications. In addition to strong technical skills, Senior .NET Core Developers often mentor junior team members, participate in architectural decisions, and ensure best practices in software development. Their expertise typically covers C#, ASP.NET Core, Entity Framework Core, and integration with various databases and cloud services.

What are the key skills and qualifications needed to thrive as a Senior .NET Core Developer, and why are they important?

To thrive as a Senior .NET Core Developer, a strong foundation in C#, .NET Core, object-oriented programming, and software architecture, often supported by a degree in computer science or related field, is essential. Expertise in tools such as Visual Studio, Azure DevOps, source control systems like Git, and familiarity with CI/CD pipelines and unit testing frameworks is typically required. Excellent problem-solving abilities, effective communication, and leadership skills help developers collaborate across teams and mentor junior staff. These skills and qualifications are crucial for delivering robust, scalable solutions and driving successful software projects.

What are some common challenges faced by Senior .NET Core Developers when working on large-scale enterprise applications?

Senior .NET Core Developers often encounter challenges such as managing complex codebases, ensuring high performance under heavy loads, and integrating with legacy systems or third-party services. They are frequently responsible for setting coding standards, performing code reviews, and mentoring junior developers, which requires strong communication and leadership skills. Additionally, staying up to date with the latest .NET Core features and best practices is essential for maintaining secure and scalable solutions in a fast-paced environment.

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

AspectSenior Net Core DeveloperSoftware Engineer
Required CredentialsBachelor's in CS or related field, experience with .NET CoreBachelor's in CS or related field, programming experience
Work EnvironmentDeveloping backend applications, working with .NET Core frameworksDesigning, developing, testing software across various platforms
Employer & Industry UsageTech companies, finance, healthcare using .NET technologiesBroad industry use, including tech, finance, startups, and enterprise

The main difference is that a Senior Net Core Developer specializes in building and maintaining backend applications using .NET Core, often with a focus on performance and scalability. A Software Engineer has a broader scope, working across different programming languages and platforms. Both roles require similar educational backgrounds and technical skills, but the Senior Net Core Developer role is more specialized in Microsoft technologies and backend development.

What are the most commonly searched types of Net Core Developer jobs in Washington, DC? The most popular types of Net Core Developer jobs in Washington, DC are:
What are popular job titles related to Senior Net Core Developer jobs in Washington, DC? For Senior Net Core Developer jobs in Washington, DC, the most frequently searched job titles are:
What job categories do people searching Senior Net Core Developer jobs in Washington, DC look for? The top searched job categories for Senior Net Core Developer jobs in Washington, DC are:
Senior Net Core Developer jobs near you

.Net Application Developer

Omni Inclusive

Reston, VA • On-site

Other

Posted 10 days ago

Job description

Senior.NET Developer

Our client is seeking a senior.NET developer responsible for building .NET applications using the latest technological stack of.NET core/.NET 6, ASP.NET MVC, C#, HTML5, Vue.Js, Entity Framework, Web API, SQL Server, and others. The primary responsibility will be to develop and implement multiple layers of the application, focusing on the application performance improvements and mitigating security vulnerabilities in the application, and to coordinate with the rest of the team working on different layers of the application infrastructure. A commitment to collaborative problem solving, sophisticated design, and quality product is essential.

Responsibilities will include:

  • Provide engineering designs and solutions for ongoing web application development to help mitigate security vulnerabilities
  • Mitigate security vulnerabilities in the web application using security scanning tools and improve web application security in the system
  • Work with the core development team to identify performance issues in the web application and implement solutions to improve the scalability, reliability, and performance of the application
  • Identify bottlenecks across the web application from both frontend and backend using tools such as Lighthouse, SQL Profiler etc. and improve application performance
  • Participate and contribute in technical meetings
  • Collaborate with internal teams to develop and implement as per the design and architecture
  • Write clean, scalable code using.NET programming languages
  • Test and deploy applications and systems
  • Revise, update, refactor and debug code
  • Improve existing software
  • Develop documentation throughout the software development life cycle (SDLC)
  • Serve as an expert on applications and provide technical support

The successful candidate will have:

  • Bachelor's degree in Information systems or related field
  • 5+ years of relevant hands-on experience in developing .NET applications
  • Proven experience as a.NET Developer using.NET core/.NET 6, ASP.NET MVC, C#, HTML5, Vue.js, Entity Framework, SQL Server
  • Familiarity and good knowledge in Bootstrap, CSS, LINQ, Web API, and other design/architectural patterns
  • Detailed technical working knowledge of techniques, standards and state-of-the art capabilities for web authentication and authorization, security vulnerabilities and remediation
  • Experience working in software security scanning tools (e.g.: CheckMarx, AppSec etc.) or any other similar tools, and web application security designs, framework
  • Extensive proven experience in optimizing, and fine-tuning the web application to achieve high-performance of the system
  • Hands-on working experience in concepts such as multithreading, parallel execution, concurrency handling, memory management, but not limited to
  • Excellent troubleshooting and communication skills
  • Attention to detail
  • Work as part of a team and individually

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