The skills required are:

• Experience working with Selenium Web Driver

• Experience with Javascript (Preferably NodeJs)

• HTML Knowledge (And css selectors)

• Version Control (Preferable Git) 

Desired skills:

• Javascript testing & assertion libraries (Mocha, Supertest, Chai, etc)

• Selenium cloud services (Browserstack, SauceLabs) 

• Page Object Pattern

• Continuous integration solutions (Jenkins, Teamcity, etc) is a plus