What I Do
Working with React Native, I build cross platform Android and IOS mobile application, writing native modules using Java or Swift, or going full native with Java/Kotlin or Swift for your projects.
Handling both Front End and Back End of your project, I idealy build Web application using the latest tech stack to guarantee a perfect modern web site.
In need for a Smart Contract ? Being a Blockchain Developer, i'm used to Ethereum or other DApp platform Smart Contract Developement, and custom Blockchain implementation.