What is the difference between Arm Cortex M vs Embedded Systems Engineer?

Career: Arm Cortex M

AspectArm Cortex MEmbedded Systems Engineer
Primary FocusMicrocontroller architecture and programmingDesigning, developing, and testing embedded systems
Required SkillsEmbedded C, hardware interfacing, real-time OSEmbedded C/C++, hardware knowledge, system integration
Work EnvironmentHardware development, firmware programmingSystem design, software development, testing
CertificationsNone specific, but embedded certifications helpfulEmbedded systems certifications (e.g., ARM accredited)

While Arm Cortex M refers to a family of microcontroller architectures, Embedded Systems Engineers design and develop complete embedded solutions using such architectures. The former is more hardware-focused, whereas the latter encompasses both hardware and software development in embedded systems projects.