React Full Backend Frontend Python Node Java Jobs in Fairfax, VA

Overview

The. NET/React Developer will play a critical role in the design, development, and maintenance of enterprise-grade web applications and services. This role is responsible for building high-quality, scalable software solutions using the Microsoft .NET stack on the back end and React (with TypeScript/JavaScript) on the front end.

This role will engage in the full software development lifecycle—from requirements analysis and solution design through implementation, testing, deployment, and maintenance. The ideal candidate is a seasoned engineer who writes clean, maintainable code, adheres to best practices and coding standards, and can effectively collaborate with cross‑functional teams (Product, UX/UI, QA, DevOps, and other engineers) to deliver robust, secure, and performant applications.

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, and maintain web applications and APIs using the ASP.NET framework, C#, Entity Framework, and SQL Server.
• Develop and maintain rich, responsive front-end user interfaces using React, TypeScript, JavaScript, HTML5, and CSS3.
• Design and implement both front-end and back-end components, ensuring seamless integration and consistent user experiences.
• Apply software design and architectural patterns (e.g., layered architecture, dependency injection, repository pattern) to build scalable and maintainable solutions.
• Design, implement, and consume RESTful APIs and other integration approaches (e.g., RPC) as required.
• Ensure application performance, scalability, security, and reliability through effective coding, optimization, and use of appropriate patterns and tools.
• Write clean, testable, and well-documented code following industry best practices, internal standards, and style guidelines.
• Conduct thorough testing, including unit, integration, and system testing, and support automated test coverage where possible.
• Troubleshoot and resolve complex technical issues, performance bottlenecks, and defects across the full stack.
• Participate in and contribute to code reviews, providing constructive feedback and ensuring adherence to standards and best practices.
• Collaborate closely with product managers, UX/UI designers, QA engineers, and other developers to define, design, and deliver new features and enhancements.
• Use Git/GitLab for source control, branching, merging, and code review workflows.
• Contribute to continuous improvement of development processes, tooling, coding standards, and team practices.
• Stay current with emerging technologies, frameworks, and best practices in .NET, React, and cloud-native development, and recommend their adoption where appropriate.
• Other duties as assigned.

Qualifications

• Bachelor’s Degree in Information Technology, Computer Science, Software Engineering, or a related field or equivalent experience.
• 8+ years of professional software development experience, with significant experience in full stack web application development.
• Strong experience with ASP.NET (MVC and/or Web API), C#, and the .NET ecosystem.
• Hands-on experience with Entity Framework and/or other Object Relational Mappers (ORMs).
• Strong understanding of SQL Server, including writing complex queries, stored procedures, and performance tuning.
• Proficiency with .NET languages and technologies (e.g., C#, ADO.NET, Entity Framework).
• Experience applying design and architectural patterns, including dependency injection, layered architecture, and SOLID principles.
• Familiarity or experience with architecture styles/APIs (REST, RPC) and integration best practices.
• Strong front-end experience with React, TypeScript, JavaScript, HTML5, and CSS3.
• Experience designing and implementing responsive, accessible UI components and pages.
• Proficiency with Git/GitLab for version control, branching strategies, and pull/merge request workflows.
• Strong problem-solving and analytical skills with the ability to debug and resolve complex technical issues across the stack.
• High attention to detail and commitment to producing high-quality, maintainable code.
• Excellent verbal and written communication skills, with the ability to collaborate effectively in cross-functional teams.
• Proven ability to work independently with minimal supervision, as well as collaboratively in an Agile/Scrum team environment.
• 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.

Our Commitment to you / overview of benefits

• Medical, Dental and Vision Insurance; Wellness Program
• Flexible Spending Accounts (Healthcare, Dependent Care, Commuter)
• Short-Term and Long-Term Disability options
• Basic Life and AD&D Insurance (Company Provided)
• Voluntary Life and AD&D options
• 401(k) Retirement Savings Plan with matching after one year
• Paid Time Off

Reports to: Program Manager

Working Conditions

• Professional office environment with the ability to work on-site.
• Must be physically and mentally able to perform duties extended periods of time.
• Ability to use a computer and other office productivity tools with sufficient speed to meet the demands of this position.
• Must be able to establish a productive and professional workspace.
• Must be able to sit for long periods of time looking at computer screen.
• May be asked to work a flexible schedule which may include holidays.
• May be asked to travel for business or professional development purposes.
• May be asked to work hours outside of normal business hours.

Other Duties: Please note this job description is not designed to cover or contain a comprehensive list of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities, and activities may change at any time with or without notice.

Cayuse is an Equal Opportunity Employer. All employment decisions are based on merit, qualifications, skills, and abilities. All qualified applicants will receive consideration for employment in accordance with any applicable federal, state, or local law.