Tailoring a resume without lying
Matching a posting is a vocabulary problem, not a truth problem.

Every posting tells you which words the hiring team uses. Tailoring means describing your real work in their vocabulary, and nothing more than that.
Start from the posting, not the resume
Read the description and pull out the nouns: the tools, the responsibilities, the outcomes it names. Those are the terms a recruiter scans for and the terms a match score is computed against.
Then look at what you have actually done. Almost always there is overlap that your current wording hides. "Ran the weekly release" and "owned deployment cadence" can be the same job.
Rewrite, do not invent
The line to hold is simple. Changing your vocabulary is fair. Changing your history is not.
- Find a bullet describing real work.
- Identify the posting's term for that work.
- Rewrite the bullet using their term, keeping the facts identical.
- If no bullet fits, leave the gap. A missing skill is survivable, a discovered fabrication is not.
If you would be uncomfortable explaining a bullet in an interview, it is no longer tailoring.
Where the effort pays off
The top third of the first page carries most of the weight. Tailor the summary and the two most recent roles carefully, then stop. Rewriting a job from six years ago is effort spent where almost nobody is reading.