Currency Exchange Webapp Development

I'm looking for an experienced web developer to build a currency exchange web application.
Paste links of your previous similar projects that used the same techniques at the beginning of the letter so I know you are the right freelancer.

Core Technologies: NestJS, Socket.IO, PostgreSQL

Key Functionalities:
- chat & notifications (real-time)
- User account management

Rights Protection:
- Data privacy and protection
- Transaction security
- Dispute resolution process through the chat

notes:
1- We do not need to integrate a market rate API, because the advertiser is the one who sets the price when creating the ad.
2- We don't need to create wallets in the app, because users will send payments to each other directly.

Ideal Skills & Experience:
- Expertise in NestJS and Socket.IO
- Strong knowledge of PostgreSQL
- Proven experience in developing secure web applications
- Familiarity with implementing data privacy measures
- Ability to design and integrate a robust dispute resolution system

Please provide examples of similar projects you've completed.