you're honestly in a pretty solid spot for a rising junior. research is really valuable in undergrad, and you have a good amount of work with LLMs/AI. you could reasonably target F500 companies for AI engineering roles imo, there's also innovation roles that a lot of companies hire for - basically creating a tool with AI integrated into it. not the best for like an early career newgrad, but for an internship its a good way to get a company on the resume.
#rising 3rd year, mickey mouse cs school, roast please
wispy sedge
if you're going for backend or more generic swe roles, i'd make a project with real users that you can replace your music platform with unless that one has user metrics you can list. obviously also emphasize the skills/stack you work with according to the role you're applying to, especially for your upcoming research role since it's full stack