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

Resources

• Express.js Documentation

• FastAPI Documentation

• Spring Boot Guide

• PostgreSQL Documentation

• GraphQL Official