What kind of programmer can write an application for processing quantitative information?

Question

Startups

Colleagues, good afternoon,
I want to develop a mobile application for people from my professional field (finance and quantitative analysis). I myself program in C / C ++ only at an amateur level.
I want to find a partner-programmer.
The purpose of the application will be to give financiers and analysts convenient access to the computing capabilities of a mobile device. In truth, the only really handy app of its kind right now is the built-in calculator. That is, there is room for improvement.
The interface will not be very complicated, but you will have to work on the filling. In particular, you will need a formula interpreter like MS Excel, xls import / export, recognition of weakly ordered data and all sorts of quantitative data processors, sometimes even in real time.
I understand that "programmer" is a general word. In fact, there are many different specially sharpened programmers.
Question: explain in simple terms what kind of programmer you need to look for for this task? What keywords on the Internet are inherent in these people? Where can you find these people?

Answer 1

If the calculation is on a mobile device (without a server part), then the keywords are:
for an application for an iPhone - objective c / swift / ios developer for
android, respectively java / android developer .me/jobs/21257