Hello Sir,
I have checked your requirement that you need to upgrade from magento 2.1.9 to magento 2.3.I am proficient with PHP, WordPress, Joomla, Magento, Codeigniter, CakePHP, , HTML5, CSS3, Bootstrap, JavaScript,Responsive Design, Theme Customization, PayPal Integration, PayPal Gateway, Plug-in development API Integration, PSD to HTML etc.I will do your task in very less span of time .I am fully committed to provide the quality solution to my client.
Love to give 100% jobs success and Bug free report.
Thanks
Neha