A remote hire is mostly decided in the first conversation. Four questions do most of the work.
Which payment providers have you connected for stores in Ecuador or nearby? A good answer names live stores and admits where they haven't worked before. A vague one usually means they'd be learning on your store.
How will you handle tax here? Listen for a request for your accountant's rates. Anyone who offers to fill them in from memory is guessing with your money.
What will you test before launch? Expect test orders in US dollars, a refund, a declined payment and a read-through of the Spanish checkout and order emails.
What happens if something breaks after launch? Ask for a support window and a response time, written into the contract.
Then pay for a small task. Before committing to the full build, buy one contained job at a fixed price, such as a trial connection of your payment provider on a staging copy of the store, or translating and testing the checkout. The trial shows you their communication, their scoping and whether they keep a deadline, for a fraction of the project cost.
And brief them for an Ecuadorian store. Say what you sell and how many products, name your payment provider (or ask for help choosing one), mention any in-person selling, and state that the store runs in US dollars with Spanish as its main language. That last line stops a remote expert assuming the wrong defaults.