.NET C# Developer, Senior

Cayuse Holdings

1d•$138,000 - $175,000

About The Position

The .NET C# Developer serves as a technical leader responsible for designing, developing, and maintaining high-quality software applications and systems using the Microsoft .NET framework and C#. This position is instrumental in supporting mission-critical programs and services for government clients, ensuring robust, scalable, and secure solutions by applying advanced programming, analytical, and problem-solving skills. The Developer works independently as well as collaboratively within cross-functional technical teams, mentoring junior staff and championing best practices in software lifecycle management. This position aligns with Cayuse’s core values of Innovation, Excellence, Collaboration, Adaptability, and Integrity by fostering technical solutions that meet customer needs, promoting teamwork, and prioritizing quality in deliverables.

Requirements

Eight years of experience in .NET Development (including MS.NET, C#, MVC 4+, and Internet Information Services (IIS) for Windows Server web development).
Five years of experience with Software Development Life Cycle Process (SDLC).
Five years of experience with software development Unit Testing, System Testing, Functional Testing, User Acceptance Testing, or other development testing experience.
Five years of experience in SQL database development stored procedures.
Five years of experience mentoring junior personnel on proper practices and procedures.
Five years of experience documenting software defects using a bug tracking system and reporting defects to software developers and project managers.
Active Top Secret/SCI Security Clearance with SBI and ability to attain SI, TK, G, HCS, and NATO Secret clearance.
Level II /Intermediate certification.
Must be able to pass a background check. May require additional background checks as required by projects and/or clients at any time during employment.
Exceptional interpersonal skills with the ability to communicate in a clear, professional, and articulate manner.
Exceptional verbal and written communication skills.
Excellent organizational, analytical, and problem-solving skills with high-level attention to detail.
Proven ability to multitask and prioritize in a fast past environment with changing priorities; adaptable to change and a quick learner.
Must be self-motivated and able to work well independently as well as on a multi-functional team.
Ability to handle sensitive and confidential information appropriately
Proficient in MS Office, Word, Outlook, PowerPoint, and Excel.

Responsibilities

Design, develop, test, deploy, and maintain complex .NET applications using C#, ASP.NET (MVC, Web API), and .NET Core.
Translate business requirements and functional specifications into robust technical solutions.
Develop and optimize SQL Server database structures, stored procedures, and queries.
Integrate applications with external systems, APIs, and third-party services.
Apply secure coding practices in accordance with federal cybersecurity and privacy requirements.
Implement automated unit, integration, and system tests to validate software functionality.
Troubleshoot, diagnose, and resolve system defects and performance issues in development and production environments.
Prepare comprehensive technical documentation, including design documents, deployment guides, and user manuals.
Collaborate with cross-functional teams including business analysts, testers, and project managers to achieve project objectives.
Participate in Agile/Scrum ceremonies, contributing to sprint planning, daily stand-ups, and retrospectives.
Coordinate software releases, deployments, and configuration management in cloud and on-premises environments.
Continually evaluate and adopt new technologies, tools, and methodologies to enhance software performance and team productivity.
Ensure solutions comply with Section 508 Accessibility standards, FedRAMP/NIST frameworks, and agency-specific guidelines.
Other duties as assigned.