# Alex Chang

**Published by:** [Alex Chang](https://paragraph.com/@alexchang2022/)
**Published on:** 2022-05-16
**URL:** https://paragraph.com/@alexchang2022/alex-chang

## Content

About MeI’m a continuous startup entrepreneur and software engineer, mostly involved in helping early stage startups design and develop products in interesting markets. I started my career as a software engineer at a mobile-game company, then founded a startup, a centralized exchange in 2018, which was mainly operated in South Korea and had a great achievement. Since then, I've worked as a developer lead and consultant for several startups and projects, including Eco DeFi, Credbay NFT, and DAV project, where I help out part-time with admissions. I have great enthusiasm to do problem solving and programming.selfieYou can reach me at: Telegram: https://t.me/alexchang2022 Discord: alexchang2022#0579 Email: alexchang2022.eth@gmail.com ENS: alexchang2022.eth City: Beijing, ChinaWork ExperienceConsultant @ Eco Global South Korea 2021-present Eco DeFi project, currently developing a DeFi lending platform on Binance Smart ChainSmart contracts are written in Solidity inspired by Compound.Users can do Supplying and Borrowing through eToken contracts.Supports Chainlink Oracle for assets price feeding.Also supports platform token(ESG) reward by eToken amount. Another NFT project is under development, which is unreleased and in confidential status now.CEO @ MineBit Exchange 2018-2020 A centralized exchange was developed by our own team, including BTC, Ethereum(ERC20), Tron(TRC20) node and wallets, and match engine was written by C/Java, which is extremely fast.Listed most tokens of top capacity.Supports trading-mining strategy.Platform token was distributed with about 30k addresses.Held a series of campaigns, such as Trading King and Lucky One.Founder @ Tapindata 2013-2017 We designed and developed some mobile applications about social and entertainment. One of them was featured by Apple AppStore because of superior product design. Most of them were ranked at top in social life leaderboard.Development Director of Data Center @ Happy Element 2009-2012 Built an intelligent analysis system for game operation, which was built up by Hadoop, Hive(Facebook), HBase and Storm(Twitter), included engagements, retentions, demographics, and some customized metrics. It was so flexible that even a common operation staff(not engineer) can make customized metrics all by himself/herself. The system could support 10 millions daily active users and about 100 metrics for every active user. Most metrics can be calculated within 10 seconds.ProjectsGameFiBox The first game is a car race game based on Polygon blockchain. Players can deposit their car NFT(ERC721), which can be bought from some NFT marketplace, and withdraw NFT to their wallets. In the game, they can collecting Diamond(ERC20 token) and mining Gold(ERC20 token), both tokens can be swapped for MATIC or stable coins in the swap applications.ESG Finance The ESG Protocol is an Binance smart contract for supplying or borrowing assets. Through the eToken contracts, accounts on the blockchain supply capital (BNB or BEP-20 tokens) to receive eTokens or borrow assets from the protocol (holding other assets as collateral). The ESG eToken contracts track these balances and algorithmically set interest rates for borrowers. ESG Protocol is 100% decentralized, which establishes a Decentralized Autonomous Organization [DAO], so all the operation decisions will pass through voting. Decisions regarding the listing of new tokens, changes in staking APY, distribution APY, etc. will be taken based on voting results.ECO NFT A NFT DApp is under development for Eco DeFi. Which is based on Ethereum blockchain and supports ERC721/ERC1155. Users can claim their lucky box trough ETH or ESG token. The NFT reveal is determined by VRF from Chainlink, which is fully randomized. Users also can stake their NFTs into staking contract to earn ESG token reward.DAV A decentralized voting DApp, which is a Decentralized Autonomous Organization [DAO] based on Klaytn blockchain. Users can vote for any proposal through this DApp. The recent hottest proposal is president election event of South Korea.EducationMaster of Software Theory in Institute of Software, Chinese Academy of Sciences (ISCAS) Natural Language Processing(NLP), Data Mining, Machine LearningBachelor of Computer Science in Dalian Maritime University(DMU) Introduction to Computer Science, Programming&Problem Solving, Data Structure&Algorithm, Operating System, Database System, Discrete Mathematics, Computer Organization, Computer Network, Computer Architecture, Java Programming, SCM principle and Interface, Compiling Principle, Embedded System, etc.LanguagesChinese Mandarin (native)EnglishSkills StackProgramming LanguagesC/C++/JavaPHP/Python/Perl/ShellNodejsSolidity/ScillaHTML/CSSDatabasesMySQLPostgreSQLMangoDBNonSQLMemcacheRedisMessage QueueZeroMQWeb serverNginxApachePHP Async FrameworkWorkermanOperating SystemCentOSUbuntuMac OSInterestsHiking & CampingProfessionalEffective communicationTeam playerStrong problem solverGood time management

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