Senior Full Stack .NET Developer

Na Ali'i Consulting & Sales, LLC.•Charleston, SC

20h

About The Position

Nakupuna Companies is seeking a highly experienced Senior Full Stack .NET Developer to design, develop, and modernize enterprise applications using the Microsoft technology stack. This is a hands-on development role requiring deep expertise in modern .NET technologies and front-end frameworks.

Requirements

Strong experience building scalable applications
Designing APIs
Working directly with stakeholders to translate business requirements into well-engineered software solutions
Ability to think architecturally while remaining hands-on with coding, testing, and implementation
Bachelor’s degree in Computer Science, Information Technology, or related field
8–12+ years of experience in software development

Nice To Haves

Experience with mobile application development or integration, including iOS, Android, or cross-platform frameworks (e.g., React Native, .NET MAUI)
Experience modernizing legacy applications to .NET 8+
Experience building scalable microservices or service-based architectures
Experience with Azure-hosted application services
Experience integrating with enterprise systems or messaging platforms
Experience performing application security code reviews

Responsibilities

Design, develop, and maintain enterprise applications using C#, ASP.NET, .NET Framework 4.x, and .NET 6/7/8/9/10+
Build and maintain RESTful APIs and backend services using .NET Web API
Develop modern responsive user interfaces using React
Integrate front-end applications with backend APIs and services
Design and implement scalable database solutions using Microsoft SQL Server
Participate in modernization efforts migrating legacy applications to modern .NET platforms
Work directly with stakeholders, product owners, and analysts to understand functional and technical requirements
Translate business requirements into technical designs and implementation approaches
Produce technical documentation, architecture diagrams, and data flow representations
Provide level-of-effort estimates and development strategies
Participate in Agile planning, backlog grooming, and sprint activities
Develop unit tests to validate business logic and application components
Implement automated testing using frameworks such as xUnit, NUnit, or MSTest
Write integration tests for APIs and service interactions
Develop front-end test coverage using tools such as Jest or React Testing Library
Ensure applications are designed with testability and maintainability in mind
Participate in code reviews and enforce engineering quality standards
Support application security testing efforts, including SAST and DAST scan remediation
Maintain appropriate test coverage for critical application functionality
Follow modern software engineering practices including clean architecture and design patterns
Conduct peer code reviews and approve pull requests
Ensure applications meet security, accessibility (Section 508), and performance standards
Troubleshoot and resolve complex technical issues
Recommend improvements to application architecture and system performance
Provide guidance and mentorship to other developers
Promote best practices in secure coding, testing, and maintainable software design
Assist with modernization and refactoring of legacy applications
Serve as a senior technical contributor within the development team