Roadmap for back-end development

As a back-end developer, you will need to know several technologies, including programming languages, databases, and server-side frameworks. Here is a roadmap for back-end development that you can follow:

1. Programming languages: Start by learning one or more programming languages, such as Java, Python, Ruby, PHP, or C#. Learn the syntax, data types, control structures, and object-oriented programming concepts.

2. Databases: Learn how to design and implement databases, including SQL and NoSQL databases like MySQL, PostgreSQL, MongoDB, or Cassandra. Learn about data modeling, normalization, indexing, and querying.

3. Server-side frameworks: Learn how to use popular server-side frameworks like Node.js, Express, Ruby on Rails, or Django, which can help speed up your development process.

4. APIs: Learn how to design and implement RESTful APIs that interact with the front-end of the application. Learn about HTTP methods, status codes, headers, and response formats like JSON or XML.

5. Server administration: Learn how to set up and maintain servers, including installing and configuring operating systems, web servers, and databases. Learn about security, backups, monitoring, and scaling.

6. Version control: Learn how to use version control systems like Git to manage your code changes and collaborate with others.

7. Testing: Learn how to write unit tests, integration tests, and end-to-end tests to ensure that your code is working correctly.

8. Security: Learn how to implement security measures, such as encryption, authentication, and authorization, to protect the application from malicious attacks.

9. Performance optimization: Learn how to optimize your application for performance, including techniques like caching, database indexing, and load balancing.

10. Cloud computing: Learn how to deploy and manage your application on cloud platforms like Amazon Web Services (AWS), Microsoft Azure, or Google Cloud Platform (GCP).

Remember that this roadmap is not exhaustive, and there are many other skills and technologies you may need to learn depending on your project requirements and career goals. Also, keep in mind that back-end development is often closely intertwined with front-end development, so it's essential to have a good understanding of both areas.