I am currently working towards a PhD in Maths, in particular in Partial Diferential Equation arising in fluid mechanics. As part of my work I have made simulations with Matlab, so I know how to program in Matlab.
In addition, I am currently studying to change my career path into the quantitative analyst path, so I have already started learning about mathematical finance. In particular, I am currently reading Joshi's book and Steven Shreve's book on Stochastic calculus for mathematical finance, and have taken the two parts of the MOOC Financial Engineering and Risk Management offered by Columbia University throught coursera.
I am not expert in Heston model, but as a PhD student in math one of my skills is to learn fast, I think I can satisfy your needs with regards of this project and at the same time, I am really interested in completing this job for the learning value and the experience I can get from it. In fact, I am already learning about Heston model :)