Some say you immediately start looking for your next job the moment you get the current one.
But that means you’re not focused on giving your best in your current job, instead, you’re focused on what’s next, what’s after, and where are you going afterward.
It splits your focus on what you need to do and where you want to go. And it sends the signal you aren’t happy where you currently are and missing out on what it could be offering you.
I go the other way, if you are signing on to join a company if you have gone through the hiring process and accepted the offer, then you are in, you are committed and what you need to show them, is how committed you are and what you bring to the table – not half of your effort, all of it.
If part way through you realize it’s not for you, move on, but that moment when you get hired, that’s when you jump in.