Study the processes at a company to find new SaaS ideas
Starting a new job? Congratulations!
If your eventual goal say 5 years down the line is to start your own SaaS product or company, become a student of the game.
Learn everything you can about how a company operates cross-functionally (there's a reason why they want you to know how to operate cross-functionally).
One of the best ways is to thoroughly study the main artery of a business: how it generates revenue. From the outset of your job, you should get a clear understanding of how a business goes from intial customer engagement to delivery of the service, while at the same time understanding how your role fits into the entire equation.
You will learn patterns in there that you can apply at a smaller scale, when you're starting your own SaaS product.