Coin98, as a cryptocurrency-focused company, likely seeks a React Engineer to develop or enhance mobile applications for their trading or blockchain services, emphasizing the need for innovative, secure, and high-performance apps in a fast-paced industry. The role suggests a desire for candidates who can handle scalability issues, integrate with backend systems, and contribute to a team driving growth in the crypto market. This could stem from Coin98's expansion or need to improve user experience in their apps, potentially targeting developers with a background in fintech to ensure reliability and quick adaptation to market changes.