I worked with Andriy on a Mailchimp to Klaviyo migration. Andriy is very methodical and good at what he does. He lays out a plan and sticks to it, but most importantly he makes you stick to the plan as well. He will push a project forward even if the going gets tough and he does not give up.
Andriy was always willing to get on a call and talk things through and he is concerned with making sure that you feel good about where the project is and if you’re not [feeling good about the project], he’ll fix it.
I highly recommend Andriy.