Hi, is there a field where the developer (or who ever) can leave their estimations? It would be great to have this in the overview of issues to define sprints.

Or the other way: is there a way I can add fields, so I can define my own estimation field.

Hello Saskia,

Thank for contacting Backlog Community Page. 

Backlog does offer a feature you to include estimated hours when creating a description. 

“Estimated Hours” allows you to set the planned hours required to complete the Issue. Similar to Start Date, this is available only when “Use Charts” is selected under Project Settings. This can be changed by editing or commenting on the Issue. “Estimated Hours” is necessary to display the accurate Burndown Chart.

Plans without Charts cannot use this feature.

Please free to message our team directly if you have any additional questions on custom fields or estimated hours.