Uploading assignment answers - for prospective employers?
Most employers do not want to see your work.  They want to see grades/marks because it is easy for them.  Only bother if an employer asks for it or you work in a field where a &quot;portfolio&quot; is common.
Post only your own work, not the materials provided by faculty.  This eliminates all concerns about plagiarism.  We do not know your university's intellectual property policy.

might be easier for future students to access and therefore make plagiarism easier.

Post the materials after the course is over.  If the faculty decide to give the same assignment again in the future, that's the faculty's problem, not yours.
The purpose of education is to make learning easier, not to make cheating harder.