Hey Jonas, some of the skills required to become an application developer are as follows:
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Must be able to recognize the needs of customers, and create new applications that answer those needs.
 
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Should be able to clearly communicate their ideas to coders, teammates and management.
 
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Creativity is needed to help invent new ways of approaching problems and developing innovative applications.
 
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Attention to Detail: Applications have many parts and all must work together for the application to function.
 
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As issues come up, application developers need to be able to make decisions that move the project forward.
 
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As part of a large team of developers, coders and more, application developers need to work well with others.
 
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Willingness to learn new programming languages and have good logical mindset.