Charlotte, NC preferred (Remote considered for highly qualified candidates)
6-Month Contract (Long-Term Opportunity – Expected Extensions Every 6 Months)
$78-$84/hr W2
We are seeking a Senior .NET / React Full-Stack Developer to join a high-performing development team supporting critical enterprise applications. This is a hands-on senior-level engineering role requiring strong experience working within large, established codebases while independently owning enhancements, defect resolution, and application support.
The ideal candidate will possess deep expertise across the Microsoft technology stack, modern React development, API integrations, authentication frameworks, and relational databases. This individual must be capable of running applications locally end-to-end, troubleshooting complex production issues, and collaborating effectively with technical and business stakeholders.
C#
.NET / ASP.NET Core
Entity Framework Core
React.js
JavaScript
TypeScript
State Management (Zustand, Redux, or similar)
Data Fetching Libraries (TanStack Query / React Query or equivalent)
REST API Development & Integration
Authentication & Session Management Troubleshooting
Git Version Control
GitLab, GitHub, Azure DevOps, or equivalent
PostgreSQL or comparable relational database systems
SQL Development & Query Optimization
5+ years of full-stack development experience
Strong proficiency with C#/.NET development
Strong proficiency with React and modern front-end development practices
Experience working within large, mature enterprise codebases
Ability to write clean, scalable, maintainable, and efficient code
Ability to independently run applications locally and troubleshoot issues across the full technology stack
Experience debugging production issues and analyzing logs
Ability to independently own defects, enhancements, and application improvements
Strong verbal and written communication skills
Ability to collaborate effectively with technical teams and business stakeholders
Experience implementing complex business rules, validation frameworks, and algorithms
Experience integrating third-party REST APIs
Experience with Okta or other Identity Providers (IDPs)
Experience troubleshooting authentication and authorization workflows
Experience creating and maintaining CI/CD pipelines
GitLab CI/CD experience strongly preferred
Experience supporting enterprise-scale applications in Agile environments
Design, develop, test, and maintain full-stack applications using .NET and React
Implement new features and enhancements within existing enterprise applications
Troubleshoot and resolve production defects and performance issues
Debug authentication, session management, and API-related issues
Develop and optimize database interactions and queries
Participate in code reviews and maintain development best practices
Collaborate with product owners, business stakeholders, and development teams
Support deployment processes and CI/CD pipeline improvements
Ensure application stability, scalability, and maintainability
Senior-level developer capable of operating independently
Strong problem-solving and debugging skills
Experience working in complex enterprise environments
Ability to quickly understand existing systems and codebases
Excellent communication and stakeholder management skills
Self-starter who takes ownership of assigned work and drives solutions to completion
#LI-AB1
The Fountain Group provides Contingent Labor, Statement-of-Work, and Contingent-to-Permanent resources to clients with an internal/external Contingent Labor Managed Service Program or Clients without a program. The Fountain Group is committed to the belief that we all share in the responsibility to conduct our businesses in a socially and environmentally responsible manner. We base this on the premise that a company is much more than the products it offers. The effect a company has on the environment, the people and the communities it serves reflects the company’s dedication to being not only a good business, but to being a good corporate citizen. The Fountain Group believes the key to servicing a client is to identify the client demand precisely. Therefore, The Fountain Group focused its efforts on building and developing a process, which can identify an exact match for our client’s needs. Our process utilizes modern technology combined with 30+ years of Talent Acquisition experience to deliver Precision resources. Financial strength is prominent among The Fountain Group’s corporate values. The future of our business will be built on the innovation, compassion, outstanding services and technology, but a solid financial foundation is required to carry us forward to meet our business goal and support our long term vision.