Upwork is one of today's leading platforms for hiring freelancers, offering a good solution for both clients and freelancers. It is a full web solution, with multiple modules, that makes it one of the first choices of freelancers around the world for finding jobs and working online.

The application offers the following:

• a marketplace, where the clients can post jobs
• there is an integrated chat feature
• there is a module where freelancers can post their own services, which clients can later buy.

Upwork has a complex algorithm for job search and people hiring, including complex calculations for a freelancer's job success score, or matching skills with the client's requirements.

In this tutorial, we will show an example of a system design for a platform similar to Upwork. We will simplify it for the purposes of the tutorial, and we will show the most important features, such as the marketplace and the chat.