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CodeSignal

Backend Architecture & Production Readiness

via CodeSignal

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Overview

Refactor the backend for production-style reliability. Replace manual validation with Zod, standardize responses, and introduce a repository pattern. Add in-memory and file-based persistence, enabling flexible data storage while keeping the API stable and predictable.

Syllabus

  • Unit 1: Validation and Response Helpers
    • Creating Task Zod Schemas
    • Implementing JSON Response Helpers with Meta
    • Wiring Zod & Response Helpers into Task Routes
  • Unit 2: Repository Pattern Basics
    • Defining the TaskRepository Interface
    • Implementing the In-Memory Map Task Repository
    • Refactoring the Service Layer to Use TaskRepository
  • Unit 3: File Persistence with JSON
    • Implementing a File-Backed Task Repository
    • Switching the Service Layer to the File Repository
    • Creating and Seeding data/tasks.json

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