Write some software

I need you to develop some software for me. I would like this software to be developed . PLC Programming / Process Control - Cambs/Beds/Herts area. I am developing an automated process to clean ekectronic assemblies. I need to turn on pumps and control pressure using PID control. I need to measure pressure, flow rate , and temperature. The final product will be ATEX certified which may influence choice of HMI and controller. May need to hire on my payroll.