Robotics, blockchain and bitcoin rank No. 1, 2 and 3 on the skills index list of the third quarter 2017.

Upwork, the largest freelancing website, today released its newest quarterly index of the hottest skills in the U.S. freelance job market. The Upwork Skills Index ranks the site’s 20 fastest-growing skills and is part of a quarterly series that sheds light on new and emerging skills freelancers are providing.

The 20 fastest-growing freelance skills in Q3 2017 all experienced more than 100 percent year-over-year growth, while the top ten grew more than 200 percent compared to the same time period last year (Q3 2016).

The top 20 fastest-growing skills, Q3 2017:

1. Robotics
2. Blockchain
3. Bitcoin
4. Penetration testing
5. React.js
6. Amazon Web Services Lambda
7. Augmented reality
8. Deep learning
9. Instagram marketing
10. Final Cut Pro X
11. Swift development
12. AngularJS development
13. Salesforce
14. Vulnerability assessment
15. Natural language processing
16. HubSpot marketing
17. Machine learning
18. Objective-C development
19. Learning Management System (LMS)
20. jQuery development

Source: Upwork