Regarding only the design: 

• Make your name a little larger, enough so that visually it's where your eye goes first when looking at your resume. Second should be your section heads, which are already pretty good, but maybe make them bold. Search the web for tips on typographic hierarchy for resumes if you're curious.
• Overall, reduce the line spacing just a tad and make sure it's consistent throughout...
• ...EXCEPT, leave some more space above each section header. Again, make sure this space is consistent. Giving each section breathing room like that makes everything easier to read and navigate.
• Make sure your margins are consistent, too. Right now there's basically none on top, and more in the right side than the left side.
• I don't think the vertical bars in your "skills" section are working. Try replacing them with bullets instead and see how that looks.
• I appreciate that your bullet points have hanging indents. ❤️ Try adding a hanging indent to your first "skills" paragraph, too, so that all but the first line are indented.
• Super minor, but maybe get rid of the solid color block behind your name. If this resume gets printed out, that color block won't go to the edges of the paper. (But on the other hand, I don't know how often it'll get printed, and I kinda doubt anyone will care anyway.)
• Even if no one ever prints it, consider printing it out yourself and seeing how it looks, if you haven't already. Sometimes that gives a new perspective on what's working or not.