The Circle by Dave Eggers.

When Mae is hired to work for The Circle - the world's most powerful internet company - she feels she's been given the opportunity of a lifetime. Run out of a sprawling California campus, The Circle links users' personal emails, social media, and finances with their universal operating system, resulting in one online identity and a new age of transparency. Mae can't believe her great fortune to have landed the job- even as life beyond the campus grows distant, even as a strange encounter with a colleague leaves her shaken, even as her role at The Circle becomes increasingly public.