Resources to bolster DS&A knowledge

AlgoExpert and Neetcode are two good resources, some people are Formation also like Structy. People learn different ways so if you are going it alone, you should try to find one that resonates with you. A lot of people I work with from Codesmith are DS&A focused and I imagine you'll find a sub community of people you can work with too on the side when you start. For backend roles at non-top tier companies, DS&A isn't super important. It is used at large top tier companies as a way of consistently and fairly evaluating people and that's it.