Developed a web app in Python that ....
Authored a playbook for...
So it's still considered "first person" by most, but the pronoun is dropped.
Can I be sure that no using "I" on resumes is a "big component" for my success? Of course I can't be 100% sure, and my ability to highlight accomplishments is probably far more important.
But I was a recruiter for 20 years, and I know that 95% of resumes I saw during my career (easily in the tens of thousands) were written in implied first person, and when you send someone a resume that continuously uses "I" it is a bit of a shock to the system (just as it would be to see third person).
I'll tell you what, let's save us both some time. Go to Google and just search "resume", and use image search. I just went through the first page of results, and I didn't see a single resume written in first person (using "I"). Not one.
I'm not saying people are filtering on seeing "I", but they would be surprised in the same way they would be by seeing third person "Thom is a CTO with..." on a CV.
I have no agenda here. I'm just telling you the facts from someone who has probably read far more resumes than most others. You don't need to accept my expertise. Again, run a google image search on resumes, tell me how many you see with the word 'I'.
You clearly don't value my experience. That's OK. I'm not some advocate for first person pronouns - it doesn't help me in any way that resumes are written in this manner. I'm just explaining to you that it's a fact.
This isn't the #1 piece of advice I give in my job. I'm a writer. I write the documents. I'm not telling them what to do.
I do offer review services, which are a small part of my business. If I get a resume with the word "I" for a review, I will tell them what I've told you.
You seem intent on belittling what I do, as if my job is to walk around telling people "don't use I".
Ok, it's not an extraordinary stretch to imagine that your form might help, but all you've actually demonstrated is that it's not catastrophically damaging!