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C# ​/.Net Developer

Job in Washington, District of Columbia, 20001, USA
Listing for: Synergy ECP
Full Time position
Listed on 2026-06-27
Job specializations:
  • Software Development
    Full Stack Developer, .NET Developer, Software Engineer, C# / Unity Developer
Salary/Wage Range or Industry Benchmark: 125000 - 155000 USD Yearly USD 125000.00 155000.00 YEAR
Job Description & How to Apply Below
Position: C# / .Net Developer

C# /.NET Developer

Net Services (NSI) is an IT services firm with a long-standing reputation for delivering high-quality, cost-effective solutions to drive lasting results. Now operating as a subsidiary of Synergy ECP, NSI continues to stand out in a crowded contracting landscape through its agility, strong customer focus, and commitment to retaining exceptional talent. By taking on challenging IT initiatives, we cultivate our talent and are continually evolving through our partnerships with clients.

Our close-knit team of highly cleared engineers, analysts, and program managers represent some of the best talent locally available.

As a C# /.NET Developer, you will contribute to the development, enhancement, and maintenance of web applications and services that support mission-critical operations. You will work hands-on with  framework and associated technologies to build clean, efficient, and reliable backend components that integrate seamlessly with front-end and cloud-based systems. In this role, you will collaborate closely with senior developers, designers, product owners, and other team members to deliver high-quality software solutions that follow best practices and meet customer needs.

You will also support defect resolution, participate in code reviews, and continually grow your skills under the guidance and mentorship of a Senior C#/.NET Developer.

What you'll do:

  • Design, develop, test, and maintain application features using C#, ASP.NET, Entity Framework, and SQL Server
  • Modify and enhance existing application code to improve performance, functionality, and maintainability
  • Integrate third-party components and APIs as needed
  • Participate in the full software development lifecycle, including planning, requirements analysis, implementation, testing, and deployment
  • Collaborate with senior developers and architects to implement technical designs and follow established patterns and standards
  • Write clean, scalable, and maintainable code aligned with best practices and team guidelines
  • Conduct unit and integration testing to validate functionality and ensure code quality
  • Troubleshoot and resolve technical issues, defects, and performance bottlenecks
  • Use Git/Git Lab for source control, branching, and code collaboration
  • Support O&M tasks such as minor enhancements, bug fixes, and performance tuning
  • Participate in code reviews and apply feedback from senior engineers to improve your technical proficiency
  • Assist with remediating code and package vulnerabilities identified through scans, with senior guidance

What you'll need:

  • Bachelor's degree and 8 years of software engineering experience
  • 3–5 years of professional experience developing software using C# and  framework
  • Experience with ASP.NET, Entity Framework, and SQL Server
  • Familiarity with architectural patterns and API styles (REST, RPC)
  • Experience writing and executing unit tests and performing integration testing
  • Understanding of secure coding practices and willingness to follow vulnerability remediation guidance
  • Ability to collaborate with cross-functional teams and translate requirements into technical tasks
  • Strong problem-solving skills and ability to work independently when implementing assigned tasks
  • Bonus points if you have:
    • Experience with cloud platforms (AWS or Azure)
    • Basic understanding of Dev Ops practices or exposure to CI/CD pipelines (Git Lab preferred)
    • Experience working with Object-Relational Mappers (ORMs) such as Entity Framework
    • Knowledge of SQL or No

      SQL database design principles
    • Experience with containerization tools (Docker)
    • Familiarity with Agile/Scrum development processes
    • Relevant certifications  development or cloud technologies

Security Clearance requirement:

Must possess active TS/SCI clearance to be considered for this role.

Other Requirements:

U.S. Citizenship

Compensation Spotlight:

For this role, our typical salary range starts at $125,000 and stretches up to $155,000. But here's the deal – we're not about capping your potential. We're committed to snapping up the best and brightest, and we're ready to put our money where our mouth is. So, if you're one of the rare exceptions to the status quo with the education, experience, and that extra…

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