Katas
Make your brain function by solving programs without using AI. Each kata is a half-built project with failing tests. Download it, set a timer, and make every test pass on your own.
- kata-001 · 2026-10-23
Digital Wallet
Deposits, withdrawals and wallet-to-wallet transfers with pluggable fees, idempotency keys, freezing and thread-safe balances.
Java · Maven + JUnit 575 min20 tests