Question: what are the skills required for ui developer?
Answer: HTML/CSS. I know, these two terms keep coming up. ... 
JavaScript/jQuery. Another MAJOR tool in your front end developer toolbox is going to be JavaScript (JS). ... 
CSS and JavaScript Frameworks. ... 
CSS Preprocessing. ... 
Version Control/Git. ... 
Responsive Design. ... 
Testing/Debugging. ... 
Browser Developer Tools.