inviting competition; provocative
challenging
consisting of many parts or details
complex
causing mental or emotional stress
stressful
earning or providing good pay.
well-paid
not earning much money or less than it's fair
badly-paid
using all of the usual working day or week
full-time
providing satisfaction; gratifying
rewarding
there's no time to be over
permanent
requiring much skill or effort
demanding
tedious and/or repetitive
dull or monotonous
occupying only part of the usual working day or week.
part-time
lasting for a period of time
temporary