Raiders opened the scoring through Espinoza, a low curling effort from 25 yards - possibly his first ever goal from outside the box - after good work from Josh Goldstein and a lay-off from David Dinkin.
Redbridge equalised midway through the half direct from a wind-assisted corner.
The winner came from a delightful through ball from Espinoza after superb pressing from Scott Waissel, Dinkin calmly flicking the ball over the keeper.
NLR joint-manager Jonny Adelman told JC Sport: "It was a very pleasing victory, we showed excellent defensive resilience restricting Redbridge to largely long-range efforts
"On another day we could and perhaps should have won by more given the chances we spurned.
"It was good that David Dinkin got on the scoresheet from open play, and with such a well-taken winning goal, it will no doubt do his confidence the world of good as he integrates in to our group."