Applied on-line, and was contacted about 2 weeks later. First 1 hour HR interview (standard HR questions: strengths/weaknesses, why Synopsys, why you, etc.), then 1 hour interview with a hiring manager. Then, on-site interview (~5 hours: 4 x 1 hour 1:1 or 1:2 meetings). Then, 3 x 1 hour phone interviews with senior R&D people. Finally, one more quick HR interview. A bit of a wringer, but overall a very positive process, as everyone was very friendly, helpful, and interesting to talk to. No complaints.

I contact the hiring manager at LinkedIn. After a week, I got a phone interview with 5 engineers. They invited me to fly to California for an onsite interview. We spend the afternoon talking about my Ph.D. dissertation and discussing program languages, advances in new technologies, EDA industry, etc. It was a very pleasant experience.