Need help writing arduino code for complicated projects

I need someone who specialises in arduino coding and building, and is based within striking distance of Peterborough, as there will need to be some face-to-face meetings and transfer of hardware items. there will be a certain amount of work going forward but current projects include remote monitoring with a Uno R3 and a SIM900, and a system to control several relays based on thermistor readings and internal logic.