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jimmymalhan
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backend-engineer

Create and review Node.js/Express backend APIs with input validation and error handling.

1|Updated Mar 7, 2026
Search Tags:#api#error handling#validation#backend#node.js#reliability#express
One-click install
npx skills add https://github.com/jimmymalhan/codereview-pilot --skill backend-engineer-jimmymalhan
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: backend-engineer
Source: https://github.com/jimmymalhan/codereview-pilot/tree/main/.claude/skills/backend-engineer
Command: npx skills add https://github.com/jimmymalhan/codereview-pilot --skill backend-engineer-jimmymalhan

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill streamlines the creation and review of backend services, ensuring robust API development with proper validation, error handling, and reliability patterns.

Core Features & Use Cases

  • API Route Creation: Define and implement new API endpoints following best practices.
  • Input Validation: Ensure all incoming data is correctly validated before processing.
  • Error Handling: Implement consistent, structured error responses for predictable debugging.
  • External Call Management: Configure retries and timeouts for external service integrations.
  • Use Case: When developing a new user registration API, this Skill will guide the creation of the route, define validation rules for user input, set up a structured error response for invalid data, and configure appropriate timeouts for any downstream service calls.

Quick Start

Use the backend-engineer skill to create a new POST endpoint at /users that accepts a JSON body with name and email, validates them, and returns a 201 status on success.

Frequently Asked Questions about backend-engineer

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

FAQPage Schema
How do I add input validation to a Node.js Express API route?▼

Input validation in a Node.js Express API route ensures incoming data is checked before processing. This Skill guides the definition of validation rules for JSON payloads, rejecting invalid requests with structured error responses.

What is the best way to structure error handling in a backend API?▼

Structured error handling in a backend API provides consistent response formats for predictable debugging. This Skill implements standardized error patterns, ensuring all endpoint failures return predictable, formatted error messages.

How do I configure timeouts and retries for external service calls in Express?▼

Configuring timeouts and retries for external service calls in Express prevents indefinite hanging during downstream integrations. This Skill configures reliability mechanisms to automatically retry or timeout failing external requests.

Can I customize routing and error handling patterns for an existing Node.js project?▼

Customizing routing and error handling patterns for an existing Node.js project is supported through configuration files. This Skill adapts to specific project requirements by loading custom routing rules and error formats.

Does this Skill help create a new user registration API endpoint from scratch?▼

Creating a new user registration API endpoint from scratch is fully supported. This Skill guides the implementation of the POST route, defines input validation for fields like email, and configures downstream service timeouts.

Why do my backend API endpoints return inconsistent error formats?▼

Inconsistent error formats in backend API endpoints occur when validation and error logic are scattered. This Skill enforces structured error responses across all handlers, replacing unpredictable failures with standardized formats.

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