I have a popular Apache Spark blog on Medium (https://medium.com/@mrpowers https://medium.com/@mrpowers). Spark is a niche technology and there isn't a lot of

I have a popular Apache Spark blog on Medium (https://medium.com/@mrpowers https://medium.com/@mrpowers). Spark is a niche technology and there isn't a lot of competition. I rank #1 on Google searches for common searches like "spark null", "testing spark", and "spark udf". I haven't done any SEO - I just write what I need to teach my coworkers and Google has picked up my articles. I'd look for a rapidly growing technology that's relatively new. That'll give you good opportunities to write blogs that rank #1 on Google without doing any SEO. I am writing all my new posts on a new domain (https://www.mungingdata.com/ https://www.mungingdata.com/) and it's harder to get traffic. So Medium might be a good place for you to start.