- Building SynStation, a content value discovery platform, on Soneium, the Sony Blockchain- Won Soneium Spark Incubation Program, directly working with Sony Blockchain- Raised pre-seed round from Aptos Labs and VCs in SF and Seoul- Built a multi-chain order book DEX- Won from multiple hackathons: -> ETH Global -> ETH Denver -> Babylon Hackerhouse -> Klaytn (Kaia) Global Hackathon -> OnePiece Pitch Event

Invested in top Asian projects including DSRV labs, Xangle, and Planetarium.Launched in 2019, Haru Invest is a digital asset management and custody platform built by Block Crafters with users from over 130 countries, $400M in AUM and a total transaction volume of $2Bn.

* Local business team - Built Local business onboarding process - Built Local business experiences* Real estate team - Built real estate listings data pipeline; integrated multiple listing sources, processed big data everyday - Built internal APIs for real estate services, which power real estate related products on Nextdoor - Built web/iOS frontend neighbor experiences - Built real estate agent experiences; neighborhood sponsorship, agent contents used tools; django, backbone.js, react, react native, swift(3~4)

Early engineer of market leading EduTech startup in series A stage backed by top tier VCs* iOS products • Released "Todo Number Matrix" as the sole s/w engineer in a month, a math learning and logical thinking app for kids; featured at Kids category on Apple AppStore. • Released a Visual Scheduler Apple Watch app for children with autism as the sole s/w engineer, featured on Apple Watch AppStore. • Developed "Todo Math", a play-based math learning app for kids; reached 1.8M downloads on Apple AppStore over 2 years; featured on Apple AppStore; bundled in iPads/iPhones for demo in Apple retail stores worldwide.* Data analytics • Developed log analytics tools to track user behavior and increase revenue employing JavaScript, Python, and MySQL.* Web back-end/front-end • Developed web dashboard for teachers and marketing tools employing NodeJS, HTML5, CSS3, AngularJS and jQuery on AWS.* Image processing • Improved image processing algorithm of "Kids in Story", a personalized photo storybook making app.

• Built and tested SOAP/REST APIs adding functions on Salesforce.com Platform.

- Setting up Amazon AWS clusters for students- Helping students analyze Twitter big data using Hadoop Map/Reduce, Pig script

• Built live music streaming app; implemented networking/cache/audio modules and UI views; 10K downloads from Apple AppStore.

• Developed "Mabinogi", a 3D online role-playing game, published across Europe, Asia, and North America having 400 Million users. (http://mabinogi.nexon.net); designed data structures, game logics and algorithms, and reduced network costs.