It is hard to find normal coder in this forum, and you are asking for Matlab. I can guarantee that you will not get enough respondents. Instead you should look into upwork or freelancer.com or perhaps even peopleperhour. If you had higher budget, I would have suggested you Toptal. But that is for larger projects.
Please send me full task description in PM. Which functions you need exactly etc. Thanks.
Are you a matlab coder?