We have a website in Magento that was built for a Website developer agency. They didn't do a good job, and now we are trying to solve the problems, in some cases even changing modules.
We do all daily maintenance in house. But we are looking for someone who can help us with some issues with existing modules and extensions (specifically with the checkout module because the incoming order mails are not arriving to the customer), also review the integration with mailchimp and some design issues in mobile version.
We are looking also for someone who can help us with security patches when needed, upgrades and speed issues. It would be great to find someone who answer quickly if any problems do arise. Can someone help us?