There are many options. Most of San Diego north of 8, and some areas south of 8 are ok to live in. Commuteness depends on how flexible your schedule is.

Escondido would only work if your commute is outside rush hour (6-9 AM to work, 4-6 PM back), and even then it would be 30-40 min. Look at the area at the east end of 56. Good schools, not too old, relatively expensive but an employee of a major wireless technology company should be able to afford it.