You sound a bit green in the new job and hiring process, and I mean no disrespect by this. Some people don't have the experience or opportunity, and others are professional interviewers across a career. Make of it what you will, but I've had well over a dozen jobs in the automotive field, and never quit one of them. Stick around long enough, and eventually they'll all quit you, or departments/facilities will close up on you.
Life time contract, so interviewing was a way of life for me. Never got too secure in any place, best advice offered was to start a layoff nestegg for every position, for when you do eventually get fired. Like clockwork, it always occurred. Most routines were that you received a call on Saturday, don't come into the office on a Monday. Drop your cr-p off here, and that's that.
Most designers and engineers are for the most part, jack of many trades. They can be interchangeable for the most part. Design has different design disciplines, and engineering has that plus multiple opportunities going for it. With that said, you might find yourself interviewing for multiple positions that are completely unique to one another. This of course assumes you are accumulating experience along the way, and doing different things in your career.
In my experience, I've never found a job in less than a few months from last layoff. There's always a time gap - where your mind begins to wonder, and wander. Many times, I've had multiple sources fighting over hiring me. And at my best opportunity, three offers presented themselves the same week. I literally walked into one onsite offer, while reading an email making an offer only moments prior. The 3rd offer wasn't happy they couldn't compete. One door will close, and one or more WILL open. That's the way it is.
I've only ever gone up to something more prosperous. I'm sure there are some that don't go that way, but ever layoff for me, and there have been many of them, offered significant advantage to get me where I am today. At worst, every layoff offers you the opportunity to grow and learn something new. To become that jack of many or all trades. And in time, that company will come along and pay you like it. Because you can do much more than your average counterpart.