Dear Sir,
I am interested in your project. I am an electronics engineer having 10 years of experience in custom built electronics projects. I have done various projects on touch pads, motor controllers, relay modules, etc. I am well family with concepts of EMI and relay problems and have successfully dealt with them in my earlier projects. I can further work on your schematic itself and develop the PCBs for it and provide you with updated schematics, PCB artwork, Gerbers, BOM and 3D step files. I can also provide you with the source code needed for atmega328P and suggest you the changes need for EMI protection against inductive loads.