Hello, Indeed111. Did you mean you'd be working in the Rio Grande community? If so, Isla Verde, in the town of Carolina, has many apartments for rent that are right on the beach and it is relatively safe compared to most other areas in the San Juan metropolitan area. Commuting from Isla Verde would be longer then I would personally be happy with (about 30 minutes) but it is surrounded by many restaurants and basically everything else you would need or want. It is largely a tourist area.
If you decide to live in Isla Verde or in another part of the San Juan metropolitan area, you'd certainly want to take the new expressway to Rio Grande (locally known as Route 66 or, according to Google Maps, as Route 188). Route 66 has a toll each way of $1.50 (if cash) or $1.45 (if you have the local version of E-Z Pass). On the bright side, you'd be going against traffic.
If you want to live closer to work you can certainly do so. There are adequate places in Rio Grande. A little farther down the road to the East is the town of Luquillo, which also has adequate places. Farther East is the marina-town of Fajardo, which has a sizable °µÍø½ûÇø community and beautiful coastline but it is about 35 minutes from Rio Grande depending on where in Rio Grande you will be working. On note of caution is that traffic can get very bad on Route 3, the main road through the East of Puerto Rico, and I've been stuck in traffic jams there for hours. Ironically, living in Isla Verde has actually been kinder to me as far as traffic is concerned. I've lived in the East myself but I prefer San Juan because there is more to do.
If you want any more info about the East, just ask.