According to the announcement, at the end of 2017 Stellar recruited a veteran team, with a substantial track record of product and marketing success, to build a front-end for Stellar’s inherent decentralized exchange called SDEX.
Stellar has also collaborated with Stellar advisor and Bitcoin Core developer Jeremy Rubin to optimize implementation of Lightning Network, which is expected to be implemented in 2018. Lightning will have a huge positive effect on Stellar’s long-term scalability and security, the company said.
Source: https://hype.codes/stellar-launch-exchange-and-add-ln-support