Hi,
my name is Oleksii. I understand your problem. I can fix bugs in your webapp.
I think I will be the right candidate because I am professional Web Developer and co-owner of a web-development team with 19 years’ experience in Website Development. I have experience in Debugging and Resolving issues, optimizing existing websites. I have good skills and work experience with PHP/MySql, Drupal, Joomla, Wordpress. During my job process we use new technologies like Html5, Css3, Bootstrap, JavaScript, JQuery, XML, IIS etc.
I'll be happy to interview with you in chat to review your needs.
Looking forward to your response and wish you a great day!