C# / .Net Developer

Medium; Washington (District of Columbia); On-site; USD 125,000 - 155,000; Full time

Benefits offered by this job

Comprehensive Health Benefits

401K Retirement Plan

Paid Time Off

Flexible Work Options

Job summary

Medium is seeking a skilled C# / .NET Developer to join its team in Washington, D.C. This role involves designing and developing web applications that support mission-critical operations, utilizing technologies such as C#, ASP.NET, and SQL Server.

You will collaborate with senior developers to deliver high-quality solutions while participating in the full software development lifecycle. A Bachelor's degree and 8 years of software engineering experience is required, along with active TS/SCI clearance. Competitive compensation and a comprehensive benefits package are offered.

Qualifications

• 8 years of software engineering experience required.
• 3–5 years of experience with C# and .NET framework.
• Experience with secure coding practices.

Responsibilities

• Develop and maintain the application features using C#.
• Participate in all phases of the software development lifecycle.
• Conduct unit and integration testing to ensure code quality.

Skills

C#

ASP.NET

SQL Server

Entity Framework

Problem-solving

Education

Bachelor’s degree

Tools

Git

GitLab

Job description

NetServices (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‑knotted team of highly cleared engineers, analysts, and program managers represent some of the best talent locally available.

C# / .NET Developer

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 the .NET 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/GitLab 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 the .NET 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 DevOps practices or exposure to CI/CD pipelines (GitLab preferred)
• Experience working with Object‑Relational Mappers (ORMs) such as Entity Framework
• Knowledge of SQL or NoSQL database design principles
• Experience with containerization tools (Docker)
• Familiarity with Agile/Scrum development processes
• Relevant certifications in .NET development or cloud technologies.
• Experience working in an Agile/Scrum development environment.
• Strong problem‑solving skills and attention to detail.
• Excellent communication and collaboration skills.

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 something special, we're not afraid to go above and beyond to secure your talent. Because for us, it's not just about a salary. It's about the complete rewards package, the culture, and the opportunity to make a real impact.

Taking Care of the People Who Take Care of The Nation

Compensation

We offer highly competitive compensation that is consistently recognized by our employees as being generous!

Health & Retirement

We offer a comprehensive Health Benefits package and 401K Retirement plan so you can take care of yourself and your family… both now and in the future. Other health‑related benefits include People Partners who will help you navigate both personal and professional worlds, as well as strong wellness related resources offered through our healthcare provider.

Education

Individual growth is a priority at NSI/Synergy ECP. Employees are encouraged to take advantage of our company‑sponsored continuing education program so they can get their degree or that next certification needed to propel them towards the next level. Not sure what's best for your career plans, we'll help you navigate it all!

Work/Life Balance

A healthy work/life balance is essential for building and executing your work effectively at NSI/Synergy ECP, but it’s also necessary to allow you the room to pursue everything you want to develop in your personal life. We offer a generous Paid Time Off benefit and 10 paid holidays a year. NSI/Synergy ECP also provides flexible work options that work with your schedule and lifestyle.

Philanthropy

With the help of our amazing employees, NSI/Synergy ECP participates annually in building awareness, volunteering and contributing to dozens of organizations. We believe that giving back creates a sense of purpose, engagement, and fulfillment. Have a cause you are passionate about? We bet you'll find others here that care about it just as much!

NSI/Synergy ECP is committed to providing equal employment opportunities to all qualified individuals. Employment decisions are based on merit, qualifications, and business needs. We do not discriminate on the basis of race, color, sex, national origin, religion, age, disability, or any other status protected by applicable law.