Design (LLD) Paytm/Phone Wallet System - Machine CodingSubhahu Jain·Sep 4, 2025·4 min readTable of contents✅ Features RequiredSolution approaches🔑 Design Patterns to Use🔥 Concurrency Challenges to Handle⚡ Concurrency Choices⚡ Algorithms InvolvedCodeProgramming BlogsJavainterviewLLDinterview questionsC++
