Hi,
I have been working on an unreal game myself for few months already and I have been using UE4 for more than 3 years.
I'm very comfortable with the engine and proficient with most its tools, whether be it animation, skeletal/static mesh pipelines or authoring shaders, which can play a huge role in the quality and performance of your product.
For instance, a common mistake I see among artists is using a unique set of textures (albedo, metallic/roughness, normal) for each mesh and thus using more GPU memory than is available.
In this case, a good use of shaders can help you get the most out of the hardware.
I also have a good mastery of the C++ API and I really believe I can help you make a great product.
Cheers,