I've found that "scala" and "excel" are ranked exceptionally high.

I don't know but maybe the author it's looking simply for "excel" and "scala" in the text without taking in account surrounding space. So:

  - "scala" would match "scalable" and "scalability"
  - "excel" would match "excellent"

I was also quite confused.

I think it's so high because "excel" is also a verb so a lot of job posts will say things like "We are looking for people who excel at what they do" and this was counted in the analysis.

Changing the search to be case sensitive might help here.

Myabe the regex pattern is checking for the pattern but not as a separte word?

"scalable solution"

"excellent benefits"

I think the chart is a little weird. Looks like Rust is second and Excel is actually third.