I was curious if anyone had tips on writing a decent one page resume - especially in how to pick apart what's most "important" from my previous work experiences and fit it into one page.
First, I highly recommend checking out our full in-depth 1 hour+ session on writing an effective resume.
To keep things at just 1 page (which can definitely be a challenge as a senior engineer):
...especially in how to pick apart what's most "important" from my previous work experiences
Here are some signals that something is worth putting on your resume:
For a very detailed breakdown of how to judge the scope (and impressiveness) of a project, check out this Q&A on senior engineer projects.