I think this is crucial to understand. A résumé is not a regurgitation of what you have done, but rather a thoughtful and well-curated list of your journey.
Do not list all the positions you’ve held since high school. A retail position you held in high school over summer would not be of much interest to a tech compa…
Pick two to three projects you know really well. You should know these from top to bottom, front to back. Knowing two to three projects really well shows dedication and ability to ship things, two desirable traits any company needs.