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Asp Net Core Internship Jobs in Washington (NOW HIRING)

REI Systems

Software Engineer (.Net)

Sterling, VA · Hybrid

Develop and maintain applications using C#, ASP.NET Core, .NET 6/8, and SQL Server. * Design and support REST APIs and backend services. * Create and optimize SQL queries, stored procedures, views ...

REI Systems

Software Engineer (.Net)

Sterling, VA · On-site +1

Develop and maintain applications using C#, ASP.NET Core, .NET 6/8, and SQL Server. * Design and support REST APIs and backend services. * Create and optimize SQL queries, stored procedures, views ...

REI Systems

Software Engineer (.Net)

Sterling, VA · Hybrid

Develop and maintain applications using C#, ASP.NET Core, .NET 6/8, and SQL Server. * Design and support REST APIs and backend services. * Create and optimize SQL queries, stored procedures, views ...

REI Systems

Software Engineer (.Net)

Sterling, VA · On-site +1

Develop and maintain applications using C#, ASP.NET Core, .NET 6/8, and SQL Server. * Design and support REST APIs and backend services. * Create and optimize SQL queries, stored procedures, views ...

Revolutional, LLC

Senior .NET Developer

Washington, DC

$115/hr

... Core 8.0, Web API, Telerik Kendo UI, and NPM. * Build and enhance web applications using ASP.NET ... NET. * Write and optimize SQL Server database objects, including T-SQL queries, stored procedures ...

Revolutional, LLC

Senior .NET Developer

Mclean, VA

$115/hr

... Core 8.0, Web API, Telerik Kendo UI, and NPM. * Build and enhance web applications using ASP.NET ... NET. * Write and optimize SQL Server database objects, including T-SQL queries, stored procedures ...

Network Designs

Senior .Net Developer

Alexandria, VA · On-site

$125 - $150/hr

Design, develop, test, deploy, and maintain enterprise applications using C#, ASP.NET Core, and current supported versions of .NET. * Develop scalable, maintainable, and reusable application ...

DANE LLC

Software Developer

Chantilly, VA · On-site

$85K - $100K/yr

Build RESTful services with ASP.NET Core, Spring Boot, or NestJS; document contracts with OpenAPI ... NET, Java, Oracle Database projects and applications. * Must have SQL Server, PostgreSQL, and ...

DANE LLC

Software Developer

Chantilly, VA · On-site

$85K - $100K/yr

Build RESTful services with ASP.NET Core, Spring Boot, or NestJS; document contracts with OpenAPI ... NET, Java, Oracle Database projects and applications. * Must have SQL Server, PostgreSQL, and ...

DANE LLC

Software Developer

Chantilly, VA · On-site

$85K - $100K/yr

Build RESTful services with ASP.NET Core, Spring Boot, or NestJS; document contracts with OpenAPI ... NET, Java, Oracle Database projects and applications. * Must have SQL Server, PostgreSQL, and ...

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All JobsAsp Net Core JobsAsp Net Core Internship JobsAsp Net Core Internship Jobs in Washington

Asp Net Core Internship information

What is an ASP.NET Core internship?

An ASP.NET Core internship is a temporary position designed for students or recent graduates to gain practical experience working with ASP.NET Core, a modern web framework developed by Microsoft. Interns typically assist with the development, testing, and maintenance of web applications using ASP.NET Core technologies. This internship helps individuals build their coding skills, learn industry best practices, and work alongside experienced developers. It often serves as a stepping stone to a full-time software development career. Interns may also have the opportunity to contribute to real-world projects and expand their professional network.

What types of projects or tasks can I expect to work on during an ASP.NET Core internship?

During an ASP.NET Core internship, you can expect to participate in a variety of hands-on tasks such as developing and maintaining web applications, working on backend APIs, debugging existing code, and writing unit tests. Interns often collaborate with experienced developers, attend code reviews, and contribute to team meetings, providing valuable exposure to the software development lifecycle. This role typically offers a balanced mix of learning new technologies, practical coding experience, and opportunities to work within agile development teams.

What are the key skills and qualifications needed to thrive as an ASP.NET Core intern, and why are they important?

To thrive as an ASP.NET Core Intern, you need a foundational understanding of C#, .NET Core framework, web development concepts, and typically a background in computer science or related fields. Familiarity with Visual Studio, SQL databases, source control systems like Git, and knowledge of RESTful APIs are commonly expected. Strong problem-solving abilities, eagerness to learn, and effective communication help interns collaborate and grow quickly in a team environment. These skills and qualities are important to ensure rapid skill development, contribute to real-world projects, and adapt to dynamic software development processes.

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Asp Net Core Internship jobs near you

Software Engineer (.Net)

REI Systems

Sterling, VA • Hybrid

Full-time

Posted 20 days ago

Job description

REI Systems’ mission is to deliver reliable, innovative technology solutions that advance Federal clients' missions and exceed their expectations. Our technologists and consultants are passionate about solving complex challenges that impact millions of lives. We take a Mindful Modernization® approach in delivering our services, including application modernization, grants management, case management systems, government data analytics, and advisory services. This approach, the REI Way, ensures mission impact by aligning our clients' strategic objectives with measurable outcomes through people, processes, and technology. 
 
We offer the same commitment to our employees by providing professional development, meaningful projects, and flexibility to spend time with family and friends. We believe employees are at their best when fulfilled in both their professional careers and their personal lives. Learn more at www.REIsystems.com 
 
Employees voted REI Systems a Washington Post Top Workplace in 2015, 2016, 2018, 2020, 2021, 2022, 2023, 2024, and 2025!


REI Systems is seeking a Mid-Level .NET / SQL Developer to support the NYC Checkbook program. The selected candidate will develop, enhance, and maintain enterprise web applications, APIs, and database solutions that support critical financial transparency and reporting systems.

 

Responsibilities

  • Develop and maintain applications using C#, ASP.NET Core, .NET 6/8, and SQL Server.
  • Design and support REST APIs and backend services.
  • Create and optimize SQL queries, stored procedures, views, and database objects.
  • Troubleshoot and resolve application and database issues.
  • Collaborate with Business Analysts, QA, and project stakeholders in an Agile environment.
  • Support CI/CD pipelines, deployments, and production releases.
  • Participate in code reviews, testing, documentation, and system modernization efforts.

Required Qualifications

  • 3-6 years of experience in .NET application development.
  • Strong experience with:
    • C#
    • ASP.NET Core / MVC
    • .NET 6/8
    • SQL Server
    • Entity Framework and/or Dapper
    • REST API development
  • Experience with Git, Azure DevOps, and Agile methodologies.
  • Strong analytical, debugging, and problem-solving skills.

 Preferred Qualifications

  • Experience with Azure cloud services and Azure Data Factory (ADF).
  • Knowledge of OAuth2/JWT authentication and application security.
  • Experience with CI/CD, automated testing, and deployment tools.
  • Experience supporting government or public-sector applications.
  • Knowledge of Section 508 accessibility requirements.

Education: Bachelor’s degree in Business, Engineering, Computer Science, or related field. Masters degree preferred. 

Clearance: Ability to obtain and maintain a clearance is preferred.

Location: Hybrid – 2 days per week at REI Systems’ Sterling, VA office.

EEO Statement: REI Systems is an Equal Opportunity Employer

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