Looking for a Raytracing/Metal specialist in swift and Xcode

I am looking for expert level AR/VR Development specialist. MUST have previous experience in ray tracing using Apple Metal in XCODE! Not unity. No other third party compilers. Project must be written entirely within Xcode using swift/C/Metal, with the bulk of the ray tracing implemented within the metal framework. Work completed and done in Unity will not be accepted. This is a standalone project for proof of concept. 1) It must load a .dae model with augmented realty (selected from the files folder) and place the .dae model in the scene as a root node. all surfaces of the .dae must be recursively set to be visible in the model and double sided so that the model can be seen when inside the model. 2) surfaces of the model shall be able to be clicked and modified to change the reflectiveness of the surface. So the user can edit how reflective a surface is within the loaded model. There shall be a stored class that details the reflective attributions of a surface. The surface shall use an index to the correct class. 2) the user shall be able to create a mapping surface by clicking 4 points to create a rectangle (or two triangles). The user shall be able to set a light source within the space by clicking a location. The ray tracing algorithm shall radiate light in at all angles in a 360 x 180 arc, reflecting off walls and other surfaces. The summation of the light on the rectangle shall be rendered. Reflections off surfaces shall take into account the reflectiveness of the surface from point 2 above. All rays shall decay at a set rate over distance, and have a nominated life time. Surface shadowing/occlusion shall be included. Reverse ray tracing should be considered if it is more efficient but yields highly similar and accurate results.