I like to recommend going to conferences that broaden your horizons or give you a different perspective.
Going to a developer conference as a developer might seem like an obvious choice but going to an event with a slightly different though still adjacent topic might provide a better learning experience and allow you to get to know people from outside your usual circle of interest.
Design conferences are particularly intriguing for developers. I can highly recommend both Reasons to: (https://reasons.to) and beyond tellerrand (https://beyondtellerrand.com/). Both have a similar background and deal with design and web topics as overarching themes with talks ranging from front-end technology in general, data visualisation, to typography and art (as of lately including quite a bit of generative art).
Events like that can be very inspiring and they can provide you with insights from other subject areas that you would've never thought to have an impact on your daily work.
