New engineers onboarding policy - Software Engineer Glassbox Employee Review

Due to company engineers' performance estimation policy new enginners don't have enouth time to learn the product through day by day work and they becomes part of the company performance review programme. Both Backend and Fronted are huge legacy code and in addition the logic is complex. New workers are being estimated by the mentioned above from the day one. In case the developer's code delivery takes more than it was planned/estimated a developer can find him self in the way out situation because he/she are part of the estimation review programme.