Solved a major scalability issue today.
I'm starting to think I might actually be as good as what I told the recruiters I was.

This hadoop-ecosystem job used to take about 2h40min and cost about USD 1.00/GB.
Now it takes 36 mins. At about 0.85/GB.
Fixed some over shuffling, restructured some bottleneck serial stages, used lots of weird words.
Folks in this company I just entered were struggling with this formerly unwieldy process for a year.
Now it's nimble enough to run every hour.

Maybe that whole "experience" thing people were always yammering about wasn't completely bullshit.