As someone who writes resumes/CVs for people and has had a long career as a tech recruiter, this was interesting on a number of levels. Lots of resume writers

As someone who writes resumes/CVs for people and has had a long career as a tech recruiter, this was interesting on a number of levels. Lots of resume writers don't even bother with summary statements, but I always use them, and my reasoning is that it is an opportunity to set the lens through which the rest of the document is consumed. If we use certain words in the summary that stick with the reader, they will apply those words to your experience in an almost subliminal way. I don't know that tone is something I look for, at least not consciously - unless the tone is clearly and overwhelmingly aggressive or overly passive. One thing that I think this summary leaves out is quantifying the skills - how senior are you? When I look at the writer's blog, there are mentions of lots of seemingly interesting home automation projects and "lifehacking" type things that differentiate the writer from many in the industry. A mention of those things (tech hobbyist with project experience in IoT and home automation) would get my attention much more in a summary than tone and confidence.