An Android developer is responsible for developing applications for devices powered by the Android operating system.
A front-end developer builds the front-end portion of websites and web applications
A back-end developer is a type of programmer who creates the logical back-end and core computational logic of a website, software or information system
A UX Designer is focused on all aspects of a product's development, including design, usability, function, and even branding and marketing.
Digital marketing, also called online marketing, is the promotion of brands to connect with potential customers using the internet and other forms of digital communication.
Product designers oversee the design process of a product. You'll want to gain relevant skills and build a portfolio if you're hoping to become one.