Liseberg manages the self-developed HR system Listig II. During the years 2011–2014, the focus was on improving the contract interpreter, which based on contracts, schedules, and time clocks creates the basis for salary. Export functionality for import to the payroll system and Liseberg's data warehouse has been developed. Data is retrieved by stored procedures and SSIS packages. The export can be started manually with Listig's desktop application or with scripted batch jobs.

Jonatan worked together with the payroll manager and payroll administrator to specify formats and rules for sick leave. Export functionality for the system's desktop application was also implemented.

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