Coders is empirically not ambiguous to the point of impeding communication, given that coder is actually in use. Language changes over time. Choosing to try to prevent that is of course something you may do, but it rarely will prevent change from happening.
My goodness, within this field itself computer used to refer to a person, not a machine. Run into any ambiguity there recently?
And so I will continue to champion the language uses I want to see. E.g. internet instead of Internet, regardless instead of irregardless, "access" as both a noun and verb, programmer/developer/engineer instead of coder.