As part of a team of 5 people, we had to create an ecommerce for a gym using
agile methodologies (SCRUM), having to present a finished project in just 4
weeks

I had to build an application that serves to give online exams and that the answers are corrected automatically, so that both students and teachers can see the results. At the same time teachers could see if any tests had been changed in any way and change those results, as well as review the statistics. Number of students who took the exam, number of passes, number of failures, absences, etc.
For this project I used React and Redux for the frontend, a server built in nodeJS with Express for a backend connected to a postgreSQL relational database through Sequelize

I made the SPA as an academic work.

The project consisted of a shift system that refers users to the different customer service positions, giving priority to those with reduced abilities or very old people. the shift is shown on the lobby screen where it indicates which stand the user should go to while the customer service operator must check which are the following shifts, what was the reason for the user's visit, if their problem was resolved.

The system was well received by users who previously had to enter the lobby, take a printed turn and wait until an operator says their number (many times it is possible that the call is not heard). This system allowed the automation of user management and optimized the attention time

website for a labor union using react, redux, nodeJS and express. They need information about users and companies asosiated with them. The website was online for about a year, , during which I gave them technical support. Then I finished my work with them. They refused to pay several times so I had to quit