Android iOS web - phone and tablet - notes app

I am looking for an experienced developer to create an Android and iOS notes app with web browser version that allows for collaboration. The ideal candidate for this job should possess the following skills and experience:

Features:
- Note taking with collaboration

Design:
- Minimalist

Platform:
- Both Android and iOS
- also web based
- preferred on flutter

Use aws s3, aws lambda function

If you have experience developing similar apps, please apply for this job. Thank you.