SEO Analysis for out of an algorithmic penalty Google Penguin

SEO Analysis for out of an algorithmic penalty Google Penguin

Hello,

We have an e-commerce site in the Ruby On Rails techno undergoing for several months now, an algorithmic penalty Google Penguin.

The phenomenon started a year ago but now has grown a few weeks with the last day we disappeared queries that we were well positioned (first or top position 4)

Therefore, I am looking SERIOUS freelance or agency to get an analysis of the situation and, of course, out of that penalty.

PS: freelancers or agencies called SEO specialist with crazy prices but with questionable practices, thank you to go your way. References will be desirable.