The Job Scheduler engine is available for 32-bit and 64-bit platforms, see Which platforms is JobScheduler available for and what platform support is provided?
The Job Scheduler requires a Java Runtime Environment (JRE) that corresponds to the JobScheduler version and architecture in use (32-bit or 64-bit).
See Z-JAVA-101 Java Virtual Machine is not started for more information if you have the wrong JRE architecture.