Endowed Assistant Professor vs Assistant Professor In US education system, the university academic positions start with Assistant Professor. But there are some occasions that positions for Endowed Assistant Professor are advertised. I could not find what exactly is "endowed Associated Prof". Is there any difference with assistant professor? Is it a type of position different from tenure track or the title endowed comes from the particular funding source? There is a similar discussion about endowed chair in US system here, but I think that is slightly different.

Please let me know, whas recruitment committee members are concerned about when hiring endowed assistant professor.
There really is very little difference between the answer Chris Gregg posted and the answer for this question. An "endowed" assistant professorship is a position which provides funds for the group of the faculty member appointed to the professorship. It can be either salary, or perhaps additional funds that can be used to support members of the group. 

Usually, applicants are not hired directly into such positions; instead, they are hired to the department first, and then appointed into such positions after a few years. They often have names like "career development assistant professorship" which indicate that this is a transient award, not a permanent one. If the hiring advertisement actually specifies the position as an "endowed" assistant professorship, I don't think it really changes the hiring process, except that they're looking for the best candidate who satisfies the conditions of the endowment.