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In the past years before 2020, I was fascinated with right ways to do softwares and studied following enterprise application technologies. I am still interesting in those technologies. In the covid 19 pandemic period of last half of 2020, I reconsidered life, I shifted my interest into finance and studied accounting, Investment Philosophies, Valuation. When I was Asia Fusion Technology, I was interested in startups and followed them in 2-3 years. After above short detour, I am still passionate about IT and keep leaning and practicing IT technologies.

• Data modeling: Star and Snowflake schema, data model resource, EAV, SQL&NoSQL, Analysis Pattern, Party, Product & Product Variant etc
• Design: domain driven design (DDD), Event Sourcing, Command and Query Responsibility Segregation (CQRS)
• Patterns: idioms, design, micro-service, UI, Analysis, unit test, antipattern, database, regexp
• ERP frameworks(odoo, idempiere): metadata driven develop, DSL, dynamic form generator, application dictionary, extension mechanism etc.
• workflow/process, BPM, BPEL
• language: c/c++, java, golang, javascript, dart, rust, typescript, python, ruby, xml
• Frameworks: angular, reactjs, vuejs, flutter, MFC, WinForm, WCF, WPF
• functional programming: clojure, scala, lisp, haskell
• big data: machine mining, neural networks, computer vision, spark, flink
• MQ & Stream: ActiveMQ, RabbitMQ, MSMQ, Kafka
• OS: linux, Windows
• cloud: kubernetes, aws, azure, alibaba,
• Cloud native application technologies: 12factor, beyond 12factors
• CICD: argocd, argo-workflow, jenkins, github action, gitlab pipeline, bazel
• DevOps & SRE : ansible, prometheus, influx, grafana, elastic search, kabana, alert, USE/RED metrics, Four Golden Signals, chaos engineering
• Developer experience (DX): skaffold, tilt, telepresence
• Biz Domains: SCADA, Command and Control, Warehouse management, ERP, e-commerce, payment, gaming, core-banking system, Credit process/system, VPN, VoIP, Hospital information system