Experience

Modhaus

• South Korea
• Entertainment Providers
• 1 - 100 Employee

• Lead of Backend Engineering

  • Jan 2023 - Present



UNOPND

• South Korea
• IT Services and IT Consulting
• 1 - 100 Employee

• Developer-In-Residence

  • Feb 2022 - Present

  UNOPND is a Web3 startup accelerator by Hashed, which incubates blockchain-based NFT / Gaming / Metaverse projects. I've been working as a multi-role developer who designs Web3 software architecture and develops Solidity smart contracts, backend infrastructures, etc. UNOPND is a Web3 startup accelerator by Hashed, which incubates blockchain-based NFT / Gaming / Metaverse projects. I've been working as a multi-role developer who designs Web3 software architecture and develops Solidity smart contracts, backend infrastructures, etc.



Ara

• Team Lead

  • Oct 2019 - Present

  - Personal schedule management assistant service, as a side project - Reached 20K+ users, App Store rank #70, and featured on the main page— after 1mo of the release - Personal schedule management assistant service, as a side project - Reached 20K+ users, App Store rank #70, and featured on the main page— after 1mo of the release



Pylon Protocol

• Software Development

• Software Engineer

  • May 2021 - May 2022

  Co-Founding Member of Pylon Protocol, a suite of DeFi savings and payments products powered by yield redirection. Developed the backend API, an on-chain data indexer, and operated the whole infrastructure. Co-Founding Member of Pylon Protocol, a suite of DeFi savings and payments products powered by yield redirection. Developed the backend API, an on-chain data indexer, and operated the whole infrastructure.



AB180 - 에이비일팔공

• South Korea
• IT Services and IT Consulting
• 1 - 100 Employee

• Lead of Data R&D Team

  • Oct 2015 - Feb 2022

  DB Engine Development - Built an in-house distributed database optimized for real-time OLAP query. - Developed an open-source MapReduce framework in Go (https://github.com/ab180/lrmr) - Developed JiT query compiler with LLVM, and integrated it with a C/C++ storage engine - Designed SIMD column-store storage format optimized for distributed data processing. - Experience in Go performance optimization & handling memory leaks - Presented at NAVER Deview 2020 (the largest dev conference in South Korea)DevOps- Operated Kubernetes cluster in production with Amazon EKS- Optimized the infra cost with dedicated node group setup and cluster autoscaling- Monitored cluster/app with Prometheus, Grafana and PagerDuty- Increased infrastructure auditability by high-coverage IaC through Terraform with KubernetesData Engineer- Worked on batch data ingestion from Snowflake to our DB engine with Airflow Show less

• Backend Developer

  • Oct 2015 - Sep 2021

  - Postback Request System using Golang - Built Continuous Deployment Pipeline using Docker and Amazon ECS- Batch Dump Exporter using Spark- Android App Manifest Data Crawler using Scala

• Android Developer

  • Oct 2015 - Sep 2017

  Airbridge SDK for Android (Installed over 40 million devices)- SDK Architecture, API, and the features- Experience on handling fragmentation issue of various Android versions- Automated unit tests and end-to-end instrumentation tests - Continuous Delivery Pipeline using Jenkins / CircleCI- Experience on project management



Airbloc Protocol

• South Korea
• Information Technology & Services

• Technical Lead

  • Jan 2018 - Dec 2019

  - Designed overall architecture of the protocol, including tokenomics and backend infrastructure - Researched about Layer 2 Scalability, privacy technology like Zero-Knowledge Proof and Secure MPC - Built a data exchange pipeline within "AB180 My Data Consortium" (incl. KB Card, Tmoney and GSSHOP) - Presented in ETHCON Korea 2019 ("Building a Blockchain Protocol for Exchanging Millions of Data") - Designed overall architecture of the protocol, including tokenomics and backend infrastructure - Researched about Layer 2 Scalability, privacy technology like Zero-Knowledge Proof and Secure MPC - Built a data exchange pipeline within "AB180 My Data Consortium" (incl. KB Card, Tmoney and GSSHOP) - Presented in ETHCON Korea 2019 ("Building a Blockchain Protocol for Exchanging Millions of Data")