3 courses match your filters.
Learn Go from the type system up: structs, methods and interfaces, then slices, maps, errors as values, and goroutines with channels.
Go · Concurrency · Interfaces · Backend
Output-based
Null safety, data classes and coroutines on the JVM.
kotlin · null-safety · data-classes · sealed-class
Output-based
Complexity analysis, the core structures, and the patterns that solve most interview and production problems.
algorithms · data-structures · big-o · interview
Output-based