RPA developers are responsible for designing, developing, and implementing robotic process automation systems that mimic human actions to perform tasks without human intervention. The demand for RPA developers is increasing across various sectors, with salaries ranging from $65,000 for freshers to $100,500 for experienced developers. Key skills required include problem-solving, analytical abilities, knowledge of programming languages like C# or .NET, and proficiency in RPA tools such as UiPath, Automation Anywhere, and Blue Prism.