Python Problem Solver

We are looking for a proficient Python developer, for solving different exercises for our Coding Academy. The job tasks are:
- Solving the exercises created by our teachers
- Computing the time that it should take for an experienced, intermediate, or junior developer.
- Publishing the progress in our Git repository.


The payment gets released on each exercise solved according the computed hours. Can be weekly, monthly, or after each exercise, but only after the exercise is finished.
The teacher will review the code, and might return it for further improvement (again, the new hours to be computed again, not expected to be done on previous ones)

Example of one exercise is attached.
Recommended time for current exercise: 3 hours.
Payment: 10us$ per hour.