Well it is a very simple design indeed, but I don't think it's a bad thing, especially since it is a blog about technical stuff, not fashion. However, I would recommend having some logo image at the top left corner. Or style the name of the blog slightly differently - maybe use some colour or a bit more fancy font. It would make a huge difference.
Also, I would make the titles of the blog posts bigger - now it is hard to see where the old post ends and the new one begins if you scroll quite fast - many people will do that.
Also, add more space between the footer links ("Subscribe...", sitemap etc.), because now they appear as one long sentence.
The structure of the text is not easy to read, I would recommend using bold or underline more, add some subheadings, so that people can scan the text easily to find what they need instead of reading from A to Z.
Hope it helps.