Dear sir/madam, I am a gis specialist and have strong experience for developing google map api and mapbox gl.
I have read your description and would like to have a chance working with you. I can send you the result in 1 day and no advance for payment. After you check the function work, so the payment will be process.
I will be happy with my work. If have any question, don’t be hesitante contact to me.
Best regards