NET Core API Developer

Client is seeking a highly skilled and self-driven Senior .NET Core API Developer with strong backend engineering expertise and the ability to work independently in a fast-paced enterprise environment.

The ideal candidate will have deep hands-on experience building scalable APIs and microservices using .NET Core technologies while effectively leveraging AI-assisted development tools such as GitHub Copilot, ChatGPT, Cursor, or similar platforms to improve productivity, code quality, and delivery speed.

This role requires someone who can take complete ownership of development tasks, troubleshoot issues independently, and contribute to modern enterprise application architecture initiatives.

Key Responsibilities

• Design, develop, and maintain enterprise-grade RESTful APIs using .NET Core / ASP.NET Core.
• Build scalable and secure microservices-based backend applications.
• Analyze business and technical requirements and convert them into scalable technical solutions.
• Develop clean, reusable, maintainable, and high-performance code.
• Integrate APIs with internal enterprise systems and third-party applications.
• Utilize AI-powered engineering tools to accelerate coding, debugging, documentation, and development workflows.
• Implement authentication and authorization mechanisms using JWT/OAuth standards.
• Optimize application performance, scalability, reliability, and security.
• Participate in architecture discussions and technical design reviews.
• Work closely with DevOps teams on CI/CD automation and deployment pipelines.
• Troubleshoot and resolve production support issues independently.
• Write unit tests, integration tests, and maintain technical documentation.
• Collaborate with cross-functional teams in Agile/Scrum environments.

• Strong experience with:
  • C#
  • .NET Core / ASP.NET Core
  • Web APIs / REST APIs
  • Entity Framework Core
  • LINQ
  • Middleware
  • Dependency Injection
  • Asynchronous Programming

• Microservices Architecture
• SOLID Principles
• Design Patterns
• API Security Best Practices
• JWT / OAuth Authentication
• API Versioning

• SQL Server
• Stored Procedures
• Query Optimization
• Database Design & Performance Tuning

• Azure and/or AWS experience
• CI/CD using Azure DevOps or GitHub Actions
• Docker & Kubernetes knowledge preferred
• Git source control

• Hands-on experience using AI development tools such as:
  • GitHub Copilot
  • ChatGPT
  • Cursor AI
  • Amazon CodeWhisperer
• Ability to independently accelerate development and troubleshooting using AI-assisted workflows

• Strong communication and collaboration skills
• Excellent analytical and problem-solving abilities
• Self-starter with strong ownership mindset
• Ability to work independently with minimal supervision
• Adaptable to fast-changing technologies and AI-enabled workflows

• Bachelor's degree in Computer Science, Engineering, or related field preferred

Donato Technologies Inc. is a trusted IT staffing, consulting, and software development partner headquartered in Dallas, Texas. We support clients across industries by understanding their unique business needs and delivering tailored technology and workforce solutions. Our focus is on connecting the right talent with the right opportunity-ensuring clients receive dependable, skilled professionals and candidates receive meaningful career growth and support. We work closely with small to mid-sized organizations to provide flexible, high-quality services that drive performance, innovation, and long-term success.