Article writing for a technology blog in Medium.com

I am looking to hire a freelance content writer for my technology website theusefultech.com I am currently the only editor and writer posting articles on the website but I am looking to expand the website and bring in more writers. Ideally, I would like someone with a bit of writing experience and someone who has posted articles about Technology, preferably related to Apple, Windows, and Android products. My expectations are 2-3 articles a week or 10-12 articles a month. You will be required to come up with the article topic and once it is approved you can start writing the article. I am looking for an ongoing month someone who is willing to write on a regular basis instead of a one off work.