Welcome to the forum @Serdjio_Ploxa and thanks for adding your profile picture. It helps build community! We're glad you're here. When you get a chance, please introduce yourself on this forum thread.
For more information on the ODK Central API please read through the documentation: https://docs.getodk.org/central-api/
This forum is good for asking specific questions. It helps when you can explain what you have already tried, what you expected to happen, and what went wrong.
If you want to hire someone you could post in Marketplace.