Ask HN: How to make my accomplishments sound more “active” as a developer?

Hi all,

I've just received a free critique of my resume from one of the professional resume service, and one of the suggestions is to use active language when talking about my accomplishments. For example, "Worked on x" or "Created y" make me sound like a doer, whereas I should say something like "Slashed costs by 30%" or "Increased revenue by 10%".

I've never measured or have been shared these things by managers or businesses. Is this particular critique even valid for developers? Would a hiring manger or HR person looking for developers care about this?