Confirmed participants (so far) include:

• BitPay
• BitGo
• ChangeTip
• ShapeShift
• 500Startups
• BlockCypher
• Mirror

Job offerings are all related to bitcoin and will be mostly technical, although there will be some non-technical openings as well.

Registration is free for job seekers: http://bitcoinjobfair.com/sunnyvale-bitcoin-job-fair-2015/