Hello,
Hope you are keeping well.
I have read through details and and I have more than 12 years of experience in Opencart (125+) Vesion 1.5.4 to 3.0.3.2 theme customization, module customization, API integration, VQMOD, product feed, Payment and shipping related, database related and other bug fixing. I can do some APP development also if you need in future.
As per your need I can do with the required skills with ajax , json , css , php , oob , api.
Please send me the task lists so will check and plan accordingly. Please let me know if you have any query.
Hope to hear from you soon.
Thank you for taking the time to read my application.
Best regards,
Apurba