This is the 12193rd most frequent Russian word.
инженерные
"Engineering" or "engineer's" (adjective form).
Here, 'инженерные' modifies 'решения', indicating that the solutions are related to engineering or design.
Инженерные решения играют важную роль в современном строительстве.
Engineering solutions play an important role in modern construction.
In this context, 'инженерные' describes 'разработки', signifying developments associated with engineering.
На выставке были представлены инженерные разработки последнего поколения.
At the exhibition, engineering developments of the latest generation were presented.
Here, 'инженерные' describes 'курсы', implying that the courses are related to engineering disciplines or studies.