Senior React.js Developer for crypto project

I have a crypto exchange website + app that is live and running. We are currently starting the process of developing a professional trading platform using React.js. We need a senior front-end developer to edit some small things on a template that we have purchased on ThemeForest. As a cryptocurrency exchange, security is the most important aspect. The senior developer must write secure code and use many security practices in react.js. Please message for more information