backend-technologies

Development

Master backend development with Node.js, Python, Java, Go, Rust, API design, databases, and microservices. Use when building APIs, designing systems, or learning backend frameworks.

QUICK START

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Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/development/backend-technologies/SKILL.md

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Backend Technologies Skill

Quick Start - Express.js API

import express, { Request, Response } from 'express';
import { prisma } from './lib/prisma';

const app = express();
app.use(express.json());

// GET all users
app.get('/users', async (req: Request, res: Response) => {
  try {
    const users = await prisma.user.findMany();
    res.json(users);
  } catch (error) {
    res.status(500).json({ error: 'Failed to fetch users' });
  }
});

// POST new user
app.post('/users', async (req: Request, res: Response) => {
  const { email, name } = req.body;
  try {
    const user = await prisma.user.create({
      data: { email, name }
    });
    res.status(201).json(user);
  } catch (error) {
    res.status(400).json({ error: 'Invalid data' });
  }
});

app.listen(3000, () => console.log('Server running on 3000'));

Core Technologies

Languages

Node.js - JavaScript runtime
Python - Versatile with many frameworks
Java - Enterprise standard
Go - Concurrent systems
Rust - Systems programming

Web Frameworks

Express, Fastify, NestJS (Node.js)
Django, FastAPI, Flask (Python)
Spring Boot, Quarkus (Java)
Gin, Fiber (Go)
Actix, Axum (Rust)

Databases

SQL: PostgreSQL, MySQL
NoSQL: MongoDB, DynamoDB
Cache: Redis, Memcached
Search: Elasticsearch

API & Messaging

REST APIs with best practices
GraphQL API design
gRPC for microservices
WebSockets for real-time
Kafka, RabbitMQ for messaging

ORM/Query Tools

Prisma, Sequelize (Node.js)
SQLAlchemy, Tortoise (Python)
Hibernate, Spring Data (Java)
GORM (Go)

Best Practices

API Design - RESTful or GraphQL standards
Database - Proper indexing and optimization
Security - Input validation, parameterized queries
Error Handling - Meaningful error messages
Testing - Unit and integration tests
Documentation - OpenAPI/Swagger docs
Logging - Structured logging
Performance - Response time optimization