Then if you have a permanent job, been working full time job for the last 18 months, you have your apartment, no criminal record, never gave false identify, you have minimum A2 German certificate,then you have a chance of getting Beschaftigung duldung for 30 months. But according to the law, your asylum proceedings must have ended with a negative decision and you must have been tolerated for 12 months(Abschebung Duldung) . After 12 months toleration if you are still working and they are not able to deport you, then you can apply for Beschaftigung Duldung.