[Blockchain][E-commerce][Andorid/IOS] Whole 8 years of working history, I led and managed a team for about 2 and a half years, and gave technical guides to junior developers for about 1 and a half years. I"d also managed 5+ projects, and led all of them to success, keeping 5 stars from all customers with good timely manners. Throughout my engineering history, I"ve redesigned and rebuilt 8+ company websites, 5 large websites from scratch, 3+ decentralized applications, and participated in 3 NFT Marketplace. All of them resulted in great profit and revenue, benefits, remarkable increases in customers for 4+ startup companies and 4+ customers, 5 services, and 2 platforms, including Healthcare, Medical, Energy, Financials, and Fintech, and so on. Participating in 50+ code review, gained deep and clear knowledge about clean code, and always write reusable, well-tested code.