ATTINY Thermostat with IR Remote

We are looking for a SW devoloper for a small attiny project. Hardware will be designed on our side. The project is a small thermostat which is switching a heater element on and off. The UI is two 7-segment Displays and 5 pcs switch buttons. 1 ON/OFF, UP/Down, Set/Enter, Start delay. An IR Remote control is duplicating this interface. Heater is controlled by GPIO on Attiny, for security reasons there is allso a tilt sensor in serial, which is also obsurved by an GPIO. An NTC 10k is used to meassure the temperature. Resolution 1°C, Accurency 2°C Displayed Temperature: 0-40°C Settable Temp: 7-28°C Antifreeze: 7°C SW should be written in C/C++. Documentation in english.