A CompTIA A+ developer is a certified IT professional specializing in understanding and solving complex hardware and software issues. They are responsible for installing, configuring, and maintaining devices, PCs, and software for end users, comprehending the basics of networking and security/forensics, properly and safely diagnosing, resolving, and documenting common hardware and software issues. They also provide appropriate customer support, understand the basics of scripting, virtualization, desktop imaging, and deployment. Their certification indicates proficiency in areas like data management and troubleshooting, making them valuable assets in any IT-related business.