No, this is not an April Fools joke.
The role has been described as: "This role would put you in the heart of a large UK convention helping customers on the front line. Tasks include handling cash, moving stock, displaying stock, setting up/taking down the stall, serving customers and more. You must be outgoing, friendly and be able to keep calm under pressure."
Benefits include: "Free entry to BUCKcon 2014. Free entry to the Summer Sun Celebration party, £50.00 cash."
The deadline for applications is 30th of April.