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.NET C# Developer Security Clearance

Job in Washington, District of Columbia, 20001, USA
Listing for: Cayuse Technologies
Full Time position
Listed on 2026-06-24
Job specializations:
  • Software Development
    .NET Developer, Backend Developer, Full Stack Developer
Job Description & How to Apply Below
Position: .NET C# Developer with Security Clearance
Overview The C# .NET Developer will contribute to the development, enhancement, and maintenance of web applications and services that enable mission‑critical operations in a federal environment. This role will work hands‑on with the .NET framework and associated technologies to build clean, efficient, and reliable back‑end components that integrate seamlessly with front‑end and cloud‑based systems. You will collaborate closely with senior developers, architects, designers, product owners, and other cross‑functional stakeholders to deliver high‑quality software solutions that adhere to best practices, coding standards, and security requirements.

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. Responsibilities
* 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, services, and APIs (e.g., REST/RPC-based) as needed.

* Participate in the full software development lifecycle (SDLC), including planning, requirements analysis, implementation, testing, deployment, and operations support.

* Collaborate with senior developers and architects to implement technical designs and follow established architectural patterns, coding standards, and design guidelines.

* Write clean, scalable, and maintainable code aligned with team guidelines, industry best practices, and security standards.

* Develop and execute unit tests and integration tests to validate functionality, ensure code quality, and support regression testing.

* Troubleshoot and resolve technical issues, defects, and performance bottlenecks, including database and service-level performance.

* Use Git/Git Lab for source control, branching strategies, code reviews, and collaborative development workflows.

* Support operations and maintenance (O&M) activities, including minor enhancements, bug fixes, performance tuning, and production support as needed.

* Participate actively in code reviews and incorporate feedback from senior engineers to continuously improve code quality and your technical proficiency.

* Assist in remediating code and package vulnerabilities identified through automated scans and security reviews, following secure coding guidance and direction from senior team members.

* Other duties as assigned. Qualifications
* Bachelor's degree in Information Technology, Computer Science, Engineering, or a related field;

* OR equivalent experience (e.g., 8+ years of relevant professional software development experience in lieu of a degree).

* 3-5 years of professional experience designing and developing software using C# and the .NET framework.

* Hands‑on experience with ASP.NET, Entity Framework, and SQL Server (queries, stored procedures, performance considerations).

* Familiarity with architectural patterns and API styles, including REST and RPC.

* Experience writing and executing unit tests and performing integration testing within a structured SDLC.

* Understanding of secure coding practices and a willingness to follow guidance for vulnerability remediation and security hardening.

* Demonstrated ability to collaborate with cross‑functional teams (e.g., product owners, testers, designers, operations teams) and translate functional requirements into well‑defined technical tasks.

* Active Top Secret Security Clearance is required.

* 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. Minimum

Skills Required:

* Excellent problem-solving and analytical skills.

* Strong communication and interpersonal skills.

* Ability to respond effectively to customers with a sense of urgency.

* Proficient in Microsoft and Adobe toolsets, including Excel, Word, PowerPoint, Acrobat, etc.

* Highly motivated with the ability to handle and manage multiple tasks at any one time.

* Ability to forge new…
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