What knowledge is essential for a modern backend specialist?

A modern backend specialist needs the following knowledge and skills:

• Programming language: proficient in Python and its ecosystem.
• Web frameworks: experience with Django, Flask, or FastAPI for creating APIs and web applications.
• Databases: knowledge of SQL (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis), ability to design data schemas.
• API: understanding of REST, GraphQL, ability to create and document APIs.
• Security: basics of authentication, authorization, protection against common vulnerabilities (SQL injection, XSS).
• Containerization and orchestration: basic knowledge of Docker, Kubernetes.
• Testing: writing unit and integration tests.
• Working with asynchronous programming: understanding async/await, event loops.
• Development tools: version control systems (Git), CI/CD.

Example of a simple REST API in Flask:

from flask import Flask, jsonify

app = Flask(__name__)

@app.route('/hello')
def hello():
    return jsonify({'message': 'Hello, world!'})

if __name__ == '__main__':
    app.run(debug=True)

These skills enable the creation of reliable, scalable, and maintainable server applications.