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The third section introduces you to back end development using `Node.js`, `Express,` and `MongoDB`. It also teaches you about the important concept of source control using `Git`.
The fourth section is where you'll get **real-world experience** by working on projects for **nonprofits**.
We'll pair you with another camper, an agile project manager, and a stakeholder from a nonprofit organization. Together, you'll plan, build and maintain apps that help that nonprofit carry out its mission more effectively.
This code is running live at [freeCodeCamp.com](https://www.freecodecamp.com). We also have [Gitter chat rooms](https://gitter.im/FreeCodeCamp/FreeCodeCamp), a [Medium publication](https://medium.freecodecamp.com), an [interactive forum](https://forum.freecodecamp.com), a [wiki knowledgebase](https://forum.freecodecamp.com/c/wiki), and even a [YouTube channel](https://youtube.com/freecodecamp).
We welcome pull requests from freeCodeCamp campers (our students) and seasoned JavaScript developers alike! Please follow [these steps](CONTRIBUTING.md) to contribute.
- The curricular content as in the `./seed/challenges` or subdirectories and our wiki are licensed under the [CC-BY-SA-4.0](./LICENSE-freeCodeCamp-Curriculum.md)