CodeArcade

Java judge engine with a queue, worker threads, verdicts, and a TypeScript platform layer.

—Total problems

5Judge verdicts

3Worker threads by default

Submissions are fetched into a Java `BlockingQueue` and processed by multiple `JudgeWorker` threads.

Express, Prisma, PostgreSQL, JWT auth, and Zod validation handle users, problems, and results.

Browse problems, submit Java or C++ code, inspect verdicts, and track leaderboard rank.

Wrong submissions show failed input, expected output, actual output, and runtime errors.

Score is ranked by difficulty, solved count, and submission efficiency.