Experiences and SkillsLanguages : C/C++, C#, PHP, Python, Java, Scala, JavaScript, HTML, CSSApplications : Android, Windows Mobile(Compact Framework), WPF, MFC/Win32 API,Silverlight, Flex, AngularJS4, ReactJS, Node.JsBuild And Packaging Systems : Ant, Maven, Gradle, SBT, Webpack, etc.Experience in Hadoop, Distributed System, Spark, Spark Streaming, HBase, Actor System(Akka), Akka streaming, Zookeeper, Storm, Redis, RabbitMQ, Kafka, Kestrel, Flume, Linux Programming and System Administration, RDBMS(MS-SQL, Oracle, MySQL, Postgres, embedded MySQL), Web Service Development(ASP.NET, PHP, Django, Flask, etc.) and Service Architecture Design.Certificate and Trainings : Cloudera Certified Developer for Apache Hadoop Training and Certificate, Apache ElasitcSearch TrainingBlogs : * About reliable Akka-Stream processing - http://www.popit.kr/akka-stream-kafka-%EC%82%AC%EC%9A%A9-%EC%8B%9C-data-fault-tolerant-%EC%B2%98%EB%A6%AC/ * Translation : http://www.popit.kr/paypal-10%EC%96%B5-request-8vm-%EC%B2%98%EB%A6%AC/Graph database : * Apache incubator-s2graph( Worked for building and maintenance for apache incubator-s2graph project in Kakao corp. ) * Support adoption and integration with existing service in KakaoCareers * Lead building services up, Weverse and Weply of beNX services. - We built the services in a short period time and are operating with reliable and scalable status. * Built BigHitShop (Global commerce service)(2018~2019) - I built global commerce service in 2 months and sustained almost 1 year. The BigHitShop built for saling goods of BTS to global fan. I integrated logistics system. I handled a spike traffic on game day of BTS goods. I built deployment system and the others. * Built "Chatbot platform" and A.I. Speaker platform ( 2017 ~ 2018) - I was one of the initiative for building Kakao's chatbot platform and "Kakao mini" A.I. Speaker platform * Reliable stream processing with akka-stream on RESTful API - Write about 700,000 messages / second on kafka queue on HTTP API using akka-stream to process reliable processing. * Stream processing with Apache spark streaming - Build and maintenance for building streaming jobs to support Kakao corp.'s huge data related processing * Support on-line CF recommendation based on social network relationships for Kakao corp.Other careersBest employee in department, DMC Lab., Samsung Electronics ( 2011 ) Samsung Software Membership