Jordan Schmidt has crafted a truckload of 2010s country hits, but his background includes writing for plenty of rock and pop artists. He brings all that to the table when working up tunes like the Blake Shelton hit “God’s Country,” where down-home lyrics meet a massive, arena-rock vibe, and Jason Aldean’s chart-topper “Lights Come On,” with its seamless mix of raw, rock ’n’ roll edge and supple, R&B-inflected grooves.