backend-patterns

Guide backend architecture patterns for Node.js, Express, and Next.js APIs.

Updated Jul 27, 2026
One-click install
npx skills add https://github.com/kouiso/designdiff --skill backend-patterns-kouiso
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Please help me install this Agent Skill.
Skill: backend-patterns
Source: https://github.com/kouiso/designdiff/tree/main/.claude/skills/backend-patterns
Command: npx skills add https://github.com/kouiso/designdiff --skill backend-patterns-kouiso

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill provides a comprehensive guide to essential backend architecture patterns and best practices, enabling developers to build scalable, maintainable, and efficient server-side applications.

Core Features & Use Cases

  • API Design: Learn to structure RESTful APIs and design effective endpoints.
  • Architectural Patterns: Implement patterns like Repository, Service Layer, and Middleware for modularity.
  • Database Optimization: Optimize queries, prevent N+1 issues, and utilize transactions.
  • Caching Strategies: Implement Redis caching and Cache-Aside patterns.
  • Error Handling: Centralize error management and implement retry mechanisms.
  • Authentication & Authorization: Secure APIs with JWT and role-based access control.
  • Background Jobs: Manage asynchronous tasks with job queues.
  • Logging & Monitoring: Implement structured logging for better observability.
  • Use Case: When designing a new microservice, consult this Skill for guidance on structuring API routes, implementing data access logic, and setting up authentication.

Quick Start

Use the backend-patterns skill to learn about implementing the Repository pattern in Node.js.

Frequently Asked Questions about backend-patterns

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I structure a RESTful API and design endpoints in Node.js or Express?

To structure a RESTful API in Node.js, you should implement architectural patterns like the Repository and Service Layer. This separates business logic from data access, ensuring your endpoints remain modular, maintainable, and scalable.

What's the best way to prevent N+1 query issues and optimize database performance?

Preventing N+1 query issues requires optimizing your data access layer through proper query structuring and utilizing database transactions. Implementing the Repository pattern helps centralize these optimizations for better overall backend performance.

How does Redis caching work with the Cache-Aside pattern for backend applications?

Redis caching using the Cache-Aside pattern works by checking the cache before querying the database. If data is missing, it fetches from the database and populates the cache, significantly reducing database load and improving API response times.

How do I implement JWT validation and role-based access control in a Next.js backend?

Implementing JWT validation and role-based access control involves securing your API endpoints with middleware. This verifies user tokens and enforces permissions, ensuring only authorized users can access specific resources in your Next.js application.

Can I use this backend architecture guidance for setting up background jobs and job queues?

Yes, this guidance covers managing asynchronous tasks using background jobs and job queues. This allows your server to handle long-running processes outside the request cycle, improving API responsiveness and system reliability.

Why do I need centralized error handling and structured logging in my Express server?

Centralized error handling and structured logging are needed to standardize error management and improve system observability. They provide consistent error responses to clients and detailed contextual logs for monitoring and debugging backend issues.