Need a shopify developer 3 4 small task

I am looking for a Shopify developer to assist me with several small tasks for my Shopify store. The specific tasks that I need help with include theme customization. I have already chosen a specific theme for my store and I would like the developer to work with that theme. I have a deadline of one week for the completion of these tasks.

Skills and experience required:
- Proficiency in Shopify development
- Experience in theme customization
- Familiarity with setting up payment gateways
- Ability to work within tight deadlines

Task
1) Mobile responsive
2) little bit of frontend changes
3) discount app(Really knowledgeable person)
4) Some content change