Of the 450 people who lost their California jobs, 375 were in Mountain View, 50 in San Francisco, and 25 in San Diego. The layoffs affect more than 2 percent of the company's total work force of about 19,000 employees.
AOL offered 100 of the affected workers employment in its Dulles, Va., and White Plains, N.Y., offices. No senior management positions were included in the layoffs.
AOL said the San Francisco and San Diego development offices will close by the end of the year. About 75 developers will remain in AOL's Irvine office for southern California, and about 300 will remain in Mountain View in Silicon Valley, in the northern part of the state.
AOL said the laid-off developers were working on a broad range of projects including streaming media, electronic wallets and address books.
Remaining developers were concentrated in projects such as voice services, calendars, radio and AOL Communicator.
A company representative said the layoffs were part of AOL's ongoing efforts to manage costs.
AOL in Julyat its Mountain View-based Netscape Communications unit. The company has been under intense pressure to improve its performance after dragging down the earnings and stock price of Time Warner, which merged with AOL to become AOL Time Warner before this year.