I am working with wordpress for more than 7 years.
I am expert in:
-- Theme customization
-- Plugin Customization
-- Bug fixing
-- Cleaning malware
-- Speed up for desktop and mobile browser
-- Making responsive for all platform
-- Setting up multisite with sub domain or sub directory
-- Buddypress installation and customization
-- Error establishing database connection
-- Internal server error
-- Site migration
-- Wordpress update
-- Theme update
-- Plugin update