If you take a quick look at the current job vacancies for front-end developers in java jobs in Maine, you will find that most job descriptions have several things in common. This means that there are some common skills employers are looking for when hiring front-end Java developers. When you look at the listings, there are key languages that many recruiters expect you to speak fluently.
While HTML helps you create web page skeletons, CSS helps you control the layout presented to you by creating HTML seamlessly and creatively. If you think it is enough to speak one language, you will miss out on opportunities because recruiters end up hiring engineers who are less good at another language.
While CSS has gone through several iterations and improvements to handling interactive web pages, JavaScript knowledge remains an added plus. In many cases, a basic functional website works. Still, when you need to do more with your websites, such as engaging, interactive games, pages with scrolling, audio, and video, and JavaScript are the way to go.
You may have a lot of programming knowledge, but it will limit you in many ways if you don't understand the key principles of responsive design and don't know how to implement them in your product. A responsive design can make a product more viable, but it's not a skill to hone when there is a chance recruiters are looking for.
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