1. A method for remote job submission, the method comprising: responsive to a computer determining that a first job of an extract, transform, load (ETL) job stream accesses a mainframe operating system, the computer retrieving at least a return code threshold for the first job from a data store, wherein the data store includes parameters for remote job submission, including one or more of: a target computer operating system type, a host internet protocol (IP) address or domain name system (DNS) server name, a userid and password for the mainframe operating system, a userid and password for an FTP server, an output class for job results, an output wait time, the return code threshold, a job file location, and a job file name; responsive to determining that an option to build job control language is selected for the first job, the computer generating job control language for the first job utilizing parameters stored in the data store including one or more of: an output class for job results, an output wait time, the return code threshold, a job file location, and a job file name; responsive to determining that the option to build job control language is not selected for the first job, the computer retrieving job control language for the first job from a library in the mainframe operating system, wherein the library comprises job control language for a plurality of jobs including the first job; the computer submitting the first job to a job reader on the mainframe operating system using a file transfer protocol, wherein a job reader receives the first job via file transfer protocol (FTP), and submits the received first job to a job scheduler for execution; responsive to the computer parsing a retrieved output file of job results, the computer determining a return code for the first job based, at least in part on, the parsed retrieved output file of job results; the computer comparing the return code for the first job to the return code threshold for the first job; the computer determining if the job stream continues based, at least in part, on the comparison and, if not, the computer transmitting an error message and aborting the job stream; the computer receiving the first job including a selection of a job type; responsive to determining that the job type of the first job is an ETL job type, the computer receiving a selection of at least one data source, and one or more data transformation rules; the computer receiving a selection of at least one data target; responsive to determining that the mainframe operating system is selected for the at least one data source, or the at least one data target, or both, the computer receiving one or more job parameters comprising one or both of: the return code threshold for the first job and an option to build job control language for the first job; the computer storing the one or more job parameters for the first job in the data store; and the computer inserting the first job into the job stream.