The JUST ecosystem is managed by the JUST Foundation, which includes individuals from Alibaba, Tencent, IBM and "other world-class internet companies," while JUST's financial analysis team hails from "several global investment banks" according to the project website.
Some of the most prominent individuals include Terance F (a blockchain expert and ex-Barclays and IBM employee), Elvis Zhang (a senior developer and experienced blockchain researcher), C Wu (a specialist in wallets and exchanges) and GL Kong (an experienced blockchain engineer and early crypto adopter).
The full names and profiles of much of the JUST team is not public. However, it appears that the project shares some overlap with the TRON development team, since the platform was announced by TRON CEO and founder Justin Sun, and has received technical and financial support from TRON.