Path to Familiarize with Any PL

1. Intermediate

Thread Pool. to familiarize with multi-threading standard libraries. You may also support industrial-level extensions:

Core execution model: multiple queues, task futures & promises, delayed or scheduled tasks, task cancellation.
Scheduling: FIFO, priority, work stealing, task batching, affinity hints
Backpressure and overload handling: submission timeout, rejection hooks, adaptive throttling, load shedding
Lifecycle management: worker crashes, watchdog support
Error propagation
Cancellation and timeout
Observability
Thread management
Deadlock avoidance

Logging system. spdlog-like equivalent.

CLI parser library.

Message Queue.

RPC framework. to familiarize with web and socket related standard library. This project also has many industrial extensions.

HTTP Server¹.

Shell².

Database systems.

Raft consensus protocol.

MapReduce, Spark, Spark Stream.

TUI framework.

GUI framework.