Keep it in your shirt, you'll be fine.
I'd love a tattoo on the front of my neck, but I'll never do it, because the tattoo I have in mind would 1) Be really intimidating and 2) Destroy my career.
Keep it above the cuffs on your arms, and below the collar on your neck, you'll be fine.
From personal experience, I've suffered remarkably little trouble with my ears, actually. I dunno if you've seen pictures but they do stand out, you can't really miss them. No doubt sometimes I've been disregarded straight off because of my ears, but I've had two proper interviews for jobs (I mean office jobs) in my short working life, and I've gotten both jobs.
I always thought it'd be more difficult than that. But then, if you're right for the job, you're right for the job. The stigma is starting to disappear, which I think is good.