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.NET C# Developer

Job in Washington, District of Columbia, 20022, USA
Listing for: Cayuse Holdings
Full Time position
Listed on 2026-08-31
Job specializations:
  • Software Development
    Backend Developer, .NET Developer, Full Stack Developer
Salary/Wage Range or Industry Benchmark: 140000 - 142000 USD Yearly USD 140000.00 142000.00 YEAR
Job Description & How to Apply Below

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 usingC#, 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 thefull 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 teststo 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 Labfor 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 incode 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 degreein 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 usingC# and the .NET framework.
  • Hands‑on experience ,Entity Framework, andSQL Server(queries, stored procedures, performance considerations).
  • Familiarity with architectural patterns and API styles, includingRESTandRPC.
  • Experience writing and executing unit testsand performing integration testing within a structured SDLC.
  • Understanding ofsecure 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 relationships, individual and teaming in nature.
  • Must be a Self-starter, that can work independently and as part of a team.

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