I have a PhD degree in theoretical and computational physics and a considerable experience in math and numerical methods, including computational finance models. I've done multiple financial math projects, please see reviews on my profile. I'm the author of dozens of computational research papers.
Please have a look at Computational Finance projects I've done:
https://www.freelancer.com/jobs/Excel-Mathematics/Convert-math-proofs-Excel-formulas/
https://www.freelancer.com/jobs/Matlab-Mathematica/Write-some-Software-Matlab-Solving/
https://www.freelancer.com/jobs/Matlab-Mathematica/discrete-optimization-using-mathematica/