Napier FinanceOct 2022 - Jun 2023Co-founder / Fullstack EngineerETH Online 2022 - 🏆$10k - Yearn 1st Prize, Aave 2nd Prize, APWine 2nd Prize, Aurora 3rd Prize • Built a fixed rate DeFi protocol with a Curve.fi like shared AMM pool from Aave, Yearn and Compound.• Led the pre-seed investment round. Led over 40+ angel/VC meetings.• Defined the milestones and processes for business and engineering development for launch.• Implemented the frontend UI for dApp. Implemented yield-stripping adapter for Lido Stake ETH in Solidity.Cross Chain AA WalletJun 2023ETHSeoul 2023 - 🏆 $3k - Worldcoin Best UsageBuilt a cross chain account abstraction wallet using Worldcoin proof of personhoodBring Your Own FaceJun 2023Hackadot 2023 by Polkadot - 🏆 $10k - 1st Place. FinalistBuilt a cross chain account abstraction wallet using Zero Knowledge proof face recognition techL1StateOracleApril 2023ZK Collective - 🏆 Finalist $2.5k - Defence in Depth by Gnosis ChainBuilt a trustless and affordable framework for storing L1 historical states on L2 using ZK proofHyperBobApril 2023ETH Tokyo 2023 - 🏆 $7k - ZKBob 1st prize, Hyperlane best useBuilt an one click L1 to L2 private transfer ERC-4337 Account Abstraction walletInterAleoableJan 2023Buidl the Future Hackathon by AleoJanuary 2023First Place 🏆$15,000• Proposed an improvement proposal to create a wallet API for Aleo, a ZK proof layer 1 privacy blockchain.CryptopasserOct 2022[Devcon VI] Shopify Air Gapped Wallet Challenge - 🏆$2500 • Created a mobile-first dApp that issues an EIP-4361 certificate token as a QR code to verify the NFT ownership.SecretMDOct 2021Encode Club Polkadot Hackathon 🏆$500• Modified Phala Polkadot substrate in Rust to privately store and view plaintext data on chain.OneClickLeverageOctober 2021Cream Finance Gitcoin - Winner 🏆$10,000• Built a feature to allow a leverage position up to 5x using flashloan on Cream Finance in Solidity and React.

• Amazon Interactive Video Service (2019 - 2021)• Video Ingest (2018 - 2021)• Clips (2016 - 2018)• Built from scratch and scaled an HLS Master Playlist server in Go on AWS ECS Fargate to hundreds of thousands RPS across 4 worldwide regions using cell-based architecture while serving legacy TV, mobile, and web clients.• Took ownership of the real-time video data pipeline service that collected stream metadata from hundreds of thousands of streams every 3 seconds under 5-second read processing time using Amazon Kinesis and S3.• Implemented centralized structured logging for hundreds of thousands of bare metal hosts, reducing log volume by 20x and significantly reducing time to diagnosis by 300%.• Designed DRM and Geoblocking features for the inaugural NFL Thursday Night football broadcast, working with various cross-functional teams to meet the strict NFL requirements.• Served on-call duty for AWS IVS and Twitch Video Core, ensuring service availability to millions of users and handling various Sev-2 incidents.• Proposed and designed a continuous test module for transcode system with Cloudwatch Alarm and PagerDuty. Achieving 99.99% uptime.• Led a cross-team project to increase the total video broadcast capacity by 25% by bringing up a new suite of bare metal servers and peripheral AWS services for a new video processing origin.• Contributed to the launch of Amazon Interactive Video Service (IVS) by repurposing various parts of existing Twitch video systems such as playback authentication, video metadata database, and analytics reporting.• Developed the Clips Manager feature, which allows search and deletion of clips, and optimized PostgresSQL indexes to allow searching and filtering.• Implemented the frontend for Twitch Clips page using React, Typescript, and GraphQL, including autoplay suggestion, video player, tracking, and chat modules.

• Developed an admin console that visualizes distributed Hadoop/HBase clusters realtime using AngularJS and D3.js.

• Graduated from Republic of Korea Army Signal School at the top of the class• Successfully completed multiple inter-Korea war drills near the North Korean border as a squad leader of Forward Observer Squad, 8159th Field Artillery Battalion • Operated various analog and digital HF/VHF/satellite military radios

• Contributed to 25% growth (3.3M to 4.4M) of daily email subscribers by running A/B tests on 1.3M users• Successfully led a mobile coupon promotion deal which was redeemed by more than 50K users

• Conducted a market research on the smartphone market strategy by interviewing over 20 retailers and 100 consumers• Compiled and organized comprehensive marketing database on a retailer’s sales volume and price in the Middle East