What do yo mean by "least amount of abstraction"? Unless I am misunderstanding what you mean by that, suggestions by user drej entail less abstraction than Spar

What do yo mean by "least amount of abstraction"? Unless I am misunderstanding what you mean by that, suggestions by user drej entail less abstraction than Spark / Hadoop etc. Also there's a difference between familiarity with "industry-renowned" frameworks and strong knowledge of the core small-scale libraries. FWIW, I'd certainly prefer to hire a developer/data scientist with the latter experience (if you feel like you have already mastered this, then congrats!).