I need a Digital Signal Processing Engineer who will design lowpass filter in C++

Job ID: 30692564

Budget: ₹12,500 – ₹37,500 INR

I need a lowpass filter in c++ which can filter 100 million complex data in very less time (time of execution should not exceed 1 second) The filter should work like 'filter' function in matlab (https://in.mathworks.com/help/matlab/ref/filter.html).