Kubernetes
Reasoning:
Rising Demand for Containerization: As more companies adopt containerization for their applications, the demand for orchestration tools like Kubernetes has surged.
Complexity: Kubernetes, while powerful, has a steep learning curve, leading to a shortage of true experts in the field.
Versatility: Kubernetes isn't restricted to one cloud provider; it's used across AWS, Azure, Google Cloud, and even on-premises, making the skillset transferable across various platforms.
High Salaries: Due to the shortage of experts and the critical nature of the tool in modern tech stacks, Kubernetes professionals often command high salaries.
For someone looking to specialize in a niche area with ample job opportunities, Kubernetes is a strong choice.