Andrii Donchenko

Back-End .NET Web Developer

I’m a back-end web developer from Ukraine with 4+ years of commercial experience, specializing in .NET Web API development.

I help businesses build new Web API applications, fix and optimize existing systems, and implement new features with clean, maintainable code.

I’ve worked on real-world projects in FinTech and Healthcare, where code quality, security, and reliability are critical.

What I can help you with:

• Design and development of RESTful Web APIs

• Bug fixing, performance optimization, and code refactoring

• Feature implementation based on business requirements

• Database design and management

• Writing clear API documentation

• Unit testing and improving code coverage

• Integration of Email and SMS notification services