The sexiest job title of the decade, data scientist, has spawned about a dozen equally sexy but somewhat confusing and overlapping job titles. The primary offshoot of a data scientist is a data engineer.
As a data engineer, your job is to build systems that collect, manage, and convert data into usable information.
This is an interesting point - as a data engineer you’re often building tools and systems to allow data scientists to do their jobs.
Back-end engineers may have less to do with data as that role is taken on by the data engineers.