Eventual Lead Software Engineer Interview LLD Experience

For lead Software Engineer, LLD Question asked: ``` Problem: Thread-Safe Transaction Ledger Design and implement a thread-safe transaction ledger system that manages account balances with the followin

For lead Software Engineer, LLD Question asked: Problem: Thread-Safe Transaction Ledger Design and implement a thread-safe transaction ledger system that manages account balances with the following requirements: Core Operations: * deposit - Add funds to an account * withdraw - Remove funds * transfer - Move funds between accounts Query Operations (must be optimized): * getTransactions - Return all transactions for an account * getTransactionsByTimestampRange - Return transactions within timestamp range across all the accounts