Thanks to Steve S for posting a link to the Quantum EverSource website which is advertising for the positions of mechanical engineers, electronic engineers and chemical engineers.
https://www.quantumeversource.com/careers
It states that these engineers will be working under the direction of the Chief Scientist (Andrea Rossi has said that is his role) and will be involved in the “design, development, and manufacture of our cutting-edge energy solutions”. One of the roles of the engineers is to “contribute to the redesign of existing products to improve aesthetics and performance”.
The job ads say that location to Istanbul, Turkey is one of the requirements of the job, as is English language proficiency.