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!