The difference between Gringotts goblins and domestic elves

There is a big difference, or there is nothing in common. They are basically two species. If you insist, it's like a cat and a dog.

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Stories about fairies and elves

Bill, the eldest son of the Weasleys, worked as a cracker in Gringotts, Egypt. In the fifth book, in order to work for the Order of the Phoenix, he applied for an office job. Furong also works in gringotts to improve her English. Only those who have graduated from Hogwarts majoring in arithmetic and divination are eligible to work in gringotts. When Harry came to gringotts for the first time, he and Hagrid sat in a cart and were pulled into his vault by goblins.

In the seventh book, Harry, Hermione and Ron cooperate with goblins to successfully enter Gringotts, steal the Hufflepuff Gold Cup (one of Voldemort's seven horcruxes) hidden in the lestrange family vault, and let go of the fire dragon guarding the vault. The three of them successfully flew out of Gringotts Bank by fire dragon, which made Gringotts a mess.