User experience design and ASP development rank among the fastest-growing, in-demand skills in the US online jobs market, according to the new quarterly skills index released today by Upwork of the top 20 hottest skills on its online staffing platform.

“We’re releasing this skills data to serve as a resource for professionals, educators and policymakers,” said Upwork CEO Stephane Kasriel. “As skills gaps persist, this information can be leveraged by smart professionals who continue to educate themselves in order to capitalize on market demands. Information about emerging skill demands may also be useful for those seeking to bolster our education system and economic competitiveness.”

The 20 hottest skills include:

1. User experience design
2. ASP development
3. Shopify development
4. English proofreading
5. SEO writing
6. Animation
7. Virtual assistant
8. Lead generation
9. Data mining
10. Video editing
11. WordPress development
12. AngularJS development
13. Java development
14. Accounting
15. Android development
16. iOS development
17. Zendesk
18. MongoDB
19. Data visualization
20. AutoCAD

The Upwork Skills Index calculates growth rates based on freelancer billings through Upwork in the second quarter 2016 versus the same quarter of the prior year.