a turkish company (tusas) designing the tf-x fighter jet and some other projects at the moment employs about 10.000 engineers. and they say more will be added to the company. lets assume half of them are working on other projects then the jet itself. this would mean about 5.000 are working on the jet. and the main engine of the jet is excluded. the engine will come more likely from rolls royce. and this company on the other hand will allocate about 500-1000 engineers to the jet or its engine. those also contributed tor the eurofighter jet project... so all in all we can say that many many are working together to build something like that. a little ant colony is nothing in comparison. and those are only the engineers. there 2 times more who work in other jobs around the project. for instance interpreter. lawyers. marketting team. IT team. and even the cleaning and service guys. their job is also important for caffee etc.