My goal is to join a team that would allow me to have the opportunities to work on projects that have the potential to produce higher business impact & learning opportunities to grow and reach promotion in the shortest possible time. Early in my career, I don't think I would mind working longer hours or being stressed as long as it is for good reason (such as the opportunity to be promoted) and within my capacity to handle it and also as long as it is not something that is long-term and chronic stress forever.
This is why I want to understand more about oncall. I know that oncall can be very stressful, and this applies to Atlassian too. Can being oncall be good for learning, even for a junior SWE, or does it always just give you chronic stress for no good reason?