You should certainly blog if you did something different, something that is innovative, if you solved an interesting problem. But.. lets be honest, political correctness aside. Most software engineers have nothing to blog about, they just glue some libraries and make couple of db requests and that's about all they do. Nothing what they do is innovative or worth blogging about. Not every engineer should blog or we would see tens of thousands of new links everyday on HN that would point to another blog that writes about how someone wrote an api and did 3 mysql requests - That's called spam. We already have thousands of resources/articles/blog posts that solved those problems and unless you are bringing something new to the table, what you wrote was already written.