Define a SLA. Classify incidents by priority. Not everything must be solved immediately. Hire a developer from different time zone to cover your night time by h

Define a SLA. Classify incidents by priority. Not everything must be solved immediately. Hire a developer from different time zone to cover your night time by his day time. Make your architecture more resilient. Identify most impactful improvements and stop implementation of new features until they are solved. Compensate well for the overtime. Ultimately, run away.