Advice for Upcoming Conferences to Attend

Hey Everyone! Wanted to get some advice from the community - I'm currently a platform engineer and want to move into a more software development focused role and then into app sec in a few years. As part of my career dev plan, my manager approved me to attend 2 conferences this year, so long as 1 is developer/app dev focused and 1 is app sec focused.

Are there any conferences that you'd recommend from your experience?

Thanks!