This is the 488th most frequent Slovak word.
pracovných
"Pracovných" means "working" or "work-related" in English.
The word 'pracovných' is an adjective in the genitive plural form, describing what kind of responsibilities they are—work-related.
Mám veľa pracovných povinností.
I have many work-related responsibilities.
Here, 'pracovných' modifies 'miest' (positions/jobs) and indicates a genitive plural case while describing the nature of the places—work-related or job-related.
Na trhu je nedostatok pracovných miest.
There is a shortage of jobs on the market.
In this context, 'pracovných' is an adjective specifying the type of 'podmienok' (conditions), stating they are related to work or employment.