Yes. Lord Mahavir and Buddha lived in the same era.

• Lord Mahavir is generally dated to around 599 BCE to 527 BCE.
• Lord Buddha is generally dated to around 563 BCE to 483 BCE.

So they were contemporaries, with Mahavir being older than Buddha.

In Jain understanding, both appeared in the same broad period of ancient India and taught paths of renunciation, discipline, and liberation, though their philosophies were distinct.