For your exact specified needs what you could do instead is just offer a bounty. That way you don't need to deal with contractors, worry about budgeting, inter

For your exact specified needs what you could do instead is just offer a bounty. That way you don't need to deal with contractors, worry about budgeting, interviews or anything similar. Do make sure it is clear how acceptance/the winner is judged. This possible due to the open source nature - require submissions to be on github. If you want things to be closed too then you'll have to do it the hard way. You can point to the other language versions as a template for the solution.