Submitting my resume through their website yielded no results. However, I used a referral from a friend and secured an interview very quickly. They are hiring extensively at the moment, so I actually interviewed for three different positions.

I bypassed the phone interview stage and proceeded directly to on-site interviews. This might be due to my proximity, being in the Silicon Valley area.

The interview process at the Cupertino campus spanned three full days, from 8 a.m. to 6 p.m. I met with a new person every 30-60 minutes. Each interviewer, primarily engineers, would spend about 10 minutes inquiring about my experience before dedicating the remainder of the time to whiteboard problem-solving. Most problems involved circuit or system design, while some required derivations. The interviewers were generally young and very energetic. I found myself exhilarated but exhausted after each day. By the end of the final day, I was so fatigued that I couldn't answer a very basic question. I should have been able to answer it just by looking at the circuit diagram, but I ended up deriving the transfer function by hand. After completing the derivation, I realized how straightforward it was – akin to performing a lengthy mathematical proof to confirm that 2+2 equals 4.

Ultimately, all three groups extended an offer. I was instructed to select one before they finalized the offer. I knew which position I preferred, but I took a week to speak individually with the hiring managers and some employees to confirm my decision. After I made my choice, the offer process took longer than I anticipated. However, given it's a large company, such procedures can involve bureaucracy.

Communication with the recruiter was excellent throughout the entire process.

Apple maintains a high level of secrecy, to the point where I didn't fully understand my exact role until I started. The interviewers couldn't disclose specific details, and I didn't see any labs or hardware during my interviews. Apple also operates on a need-to-know basis; access is granted only for tasks essential to one's job. Consequently, when interviewing for multiple groups, an individual from one group has only a vague understanding of the work being done by another.

In many respects, the interview process serves as a preview of the work environment. It's fast-paced, secretive, and demands a thorough understanding of one's field. I would emphasize that fundamental analytical skills are valued more than specific knowledge. Apple differed from other companies in that they prioritized how well I could apply my knowledge over the exact extent of my expertise. This is crucial for daily work, as each engineer is given a significant degree of individual responsibility.

If you have a 10W light bulb and a 100W light bulb, and you connect them together, which one will be brighter?