Facebook is advertising five blockchain positions on the careers page of its website, sparking speculation it is close to launching some kind of cryptocurrency product.

The jobs include the following:

Data scientist

Data engineer

Software engineer (x2)

Product Marketing Lead

It’s the marketing job that has raised the most eyebrows, with marketing professionals usually brought on board when a product is about to launch.

In the job description, Facebook says “we are seeking an experienced leader to build and manage a new product marketing team focused in exploring the opportunity the blockchain will bring.”

Among the minimum qualifications is “experience with payments or the blockchain.”

Coinbase’s David Marcus joined Facebook

In August of this year, a top Coinbase executive left to work on a mysterious Facebook Blockchain project.