# 53 - Building DeFi on Layer 2 | Synthetix, Loopring, Immutable

*Author: David Hoffman*
*Published: Feb 22, 2021*
*Source: https://www.bankless.com/-building-defi-on-layer-2-synthetix*

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**Justin Moses** - CTO of Synthetix
**Robbie Ferguson** - Co-Founder & President of Immutable
**Matt Finestone** - Head of Business Development at Loopring

We discuss how these three voices in the crypto space have been integral in building successful DeFi products on the Ethereum mainnet. Listen in for a deep-dive into the different methods these protocols have taken to implement their apps on an Ethereum Layer 2.

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### TOPICS
- Immutable NFTs & ZK-Rollups
- Loopring & ZK-Rollups
- Synthetix & Optimistic Rollups
- Why Ethereum? Why Rollups?
- Layer 2 Efficacy
- Roadmaps for Synthetix, Loopring, and Immutable
- Composability Issues
- Layer 2 Fiat On-Ramps
- Is Layer 2 Competing w/ ETH?

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### RESOURCES
[Synthetix](https://synthetix.io/)

[Immutable](https://www.immutable.com/)

[Loopring](https://loopring.org/#/) 

[An Incomplete Guide to Rollups (w/ Vitalik)](https://youtu.be/wcCHlqgGSH4)