Develop Dex/Defi protocols like Sushiswap

*This proposal is only open to those who have forked and customized Sushiswap in the past.
As a condition for selecting a developer, we will ask you to submit your portfolio of a Dex/Defi project that you have developed in the past. And then reviewing it we will decide on the developer of this job.

We would like to create the following system.

List of main features
1. Cross-chain Swap (like "xSwap" in Sushiswap 2.0)
Minimum supported chains: Ethereum, Binance Smart Chain, Polygon (more is even better)
2. Multi-chain liquidity mining pool (like "Earn" in Sushiswap 2.0)
Minimum supported chains: Ethereum, Binance Smart Chain, Polygon (more is even better)
3. Staking with own native token (normal staking or like Sushiswap staking [Sushi - xSushi])
Our native token: ERC20 token
4. NFT Marketplace (like "NFT Marketplace" in Pancakeswap or OpenSea)

We do not specify the means or method of implementing above features.
Regarding how to develop, please propose the methods from the developer such as forking or cloning existing Sushiswap, Uniswap or Pancake, or developing from scratch.

There is no specification regarding the UI, but the background color should be white base.
If you can customize UI, please refer to the attached document (our request).

Development List
1. Normal Swap(single chain) + Cross-chain Swap: both necessary
2. Multi-chain liquidity mining pool
3. Staking with own native tokens
4. NFT Marketplace
5. Issuance of ERC20 tokens
6. Custom UI

Cost: $1,500~2,000
Duration: 2~3 weeks
Requirements: Developers who have forked and customized Sushiswap in the past.