You can do this.

The schematic symbol, PCB footprint and the physical part for the processor you want are all available in EasyEDA:

If you draw your schematic, set up all the correct Bill of Materials (BoM) and PCB package information on the schematic so that it passes easily into PCB layout, then you can do the PCB design and submit it.

• This will get you an instant quote for the PCB itself.

• If you add a note into the Remark section of the PCB submission page then you can add your requirement for the PCB to be populated so that you receive an assembled PCB (PCBA).

Please make it clear in this note:

• if you want all the components fitted to the PCB

and then set the Mounted parameter for each component in the schematic to Yes

https://easyeda.com/forum/topic/Setting_component_as_non_assembled_optional-h5ZgasK2W

or:

• if you want only the MCU fitted to the PCB and no other components

and then set the Mounted parameter for the MCU to Yes and all other components in the schematic to NONE

https://easyeda.com/forum/topic/Setting_component_as_non_assembled_optional-h5ZgasK2W

You will then be contacted by Support to give you a quote for the component supply and assembly cost.