Service Development Team > Technology Development Part.in charge of software development for mobile game publishing and operation.---Springboot (Webflux, JAVA / Kotlin, JDK 15+) , Blazor Server (.NET8) ,MySQL, MongoDB, Redis, Kafka, docker, Linux (Ubuntu, AmazonLinux), AWS / on-premise, AAA, IAP, Firebase admin, Back office,Microservice Architecture

SpringBoot (open-jdk1.8) - Reactive JAVA, Kotlin,Flask - Python (2.7.5), dJango - python - Python 3.6,React+TypeScriptAWS (EC2, ELB, Route53, Elasticache, RDS, S3, CloudFront) ,OS: Ubuntu18.04, CentOS7,API server development for Melchi App/Backoffice

Participated as lecturer (Jan 2 to 5, 2019, 40 hours) - conducted a study and prepared the materials, during the three months, for the lecture, "Ethereum-based DApp development" of "Blockchain Specialist Training Course" in Baekseok University - taught DApp development process, originality grammar, and web3.js usage - developed DApps(contracts and web pages) for 5 subjects including Simple Storage, Auction, Voting, Gamble, and ERC20 Token managementCore Developer (Aug 2018 –… Show more Participated as lecturer (Jan 2 to 5, 2019, 40 hours) - conducted a study and prepared the materials, during the three months, for the lecture, "Ethereum-based DApp development" of "Blockchain Specialist Training Course" in Baekseok University - taught DApp development process, originality grammar, and web3.js usage - developed DApps(contracts and web pages) for 5 subjects including Simple Storage, Auction, Voting, Gamble, and ERC20 Token managementCore Developer (Aug 2018 – Sep 2018, Jan 2019) - studying about EOS blockchain and smart contract development - While developing system contracts to be used on eosBlack's main net, I was advised to resign.※ Ethereum (GETH), Web3.js, EOS, Smart Contract(Solidity, C++) Show less

Communication Server Developer - Network Access Gateway (with SKT) 2013.04 ~ 2018.08 : Socket Server (TCP/TLS, Restful Open API), Interface modules with SKT Systems, STUN/TURN Server, iOS Call History (parsing ACR, conversion), etc. Linux (RedHat 6.x), C/C++, ORACLE 11g (ODBC) - Joyn Application Server (with KT) 2011.10 ~ 2013.03 : Instant Messaging / Video Share Application Server (SIP, MSRP) based on RCS-e (GSMA), On-line/Off-line Charging (DIAMETER… Show more Communication Server Developer - Network Access Gateway (with SKT) 2013.04 ~ 2018.08 : Socket Server (TCP/TLS, Restful Open API), Interface modules with SKT Systems, STUN/TURN Server, iOS Call History (parsing ACR, conversion), etc. Linux (RedHat 6.x), C/C++, ORACLE 11g (ODBC) - Joyn Application Server (with KT) 2011.10 ~ 2013.03 : Instant Messaging / Video Share Application Server (SIP, MSRP) based on RCS-e (GSMA), On-line/Off-line Charging (DIAMETER Client), Push (GCM/APNS), etc. Linux (RedHat 6.x), C/C++, HTTP, TCP/TLS Show less

Simulator Developer (Oct 2008 – Jun 2011) - developed a simulator for the training of internal and external pilots of Army UAVs. - developed a battlefield environment simulator for tactical doctrine training for Korean Utility Helicopter pilots