If you're looking for a modern and minimal logo that'll stand out from the crowd, then I've got you covered.
I'm a freelance logo designer who's now in this field for a year. I've been an active member on websites like '99designs' and 'DesignCrowd' for a long time with a good track record.
Although I specialise in minimal and flat designs, I can design almost everything that comes to your mind, maybe even better.
You sure wouldn't have to worry about credibility. You can always check my profile on the previously mentioned sites if you have any doubt.