Mark Wu
Blockchain engineer in Tokyo
I write and audit smart contracts, and I build small web products of my own. I also run a business in the real world. My working languages are Chinese, Japanese and English.
Products
Two products you can open now.
Tickspace
A shared space for a family's values, long-term goals and daily to-dos.
For families who want to keep what matters in view next to what is due today.
Open Tickspace (opens in a new tab)tickspace.markwu.xyz
JPYC Watcher
A dashboard for JPYC pool TVL, trading volume and estimated APY.
APY figures are estimates, not guaranteed returns.
Open JPYC Watcher (opens in a new tab)jpyc-watcher.markwu.xyz
About
I'm a blockchain engineer based in Tokyo. I have worked on smart contract development and security auditing for Web3 projects, including JPYC v2 and SPARKN.
I take a long-term view of Web3, try to keep learning outside my comfort zone, and keep up with new technology such as AI.
Project experience
Earlier project work. The products above are what I am building now.
JPYC v2
Development and smart contract auditing for JPYC v2, a JPY stablecoin protocol.
View JPYC v2 (opens in a new tab)SPARKN Contracts
Smart contract development and security auditing for SPARKN, a decentralized contest platform.
View SPARKN Contracts (opens in a new tab)DAO Community Contracts
Governance contracts for community DAOs, covering proposals, voting and treasury management, with an audit.
View DAO Community Contracts (opens in a new tab)SPARKN App
Full-stack work on SPARKN, from smart contracts and backend services to the front end.
View SPARKN App (opens in a new tab)Security research
Independent security researcher on Code4rena, Sherlock and CodeHawks, finding vulnerabilities in several protocols. I have also commissioned audits as a project owner.
View Security research (opens in a new tab)AI Agent NFT project
NFTs linked to AI agents, putting agents on-chain as tradable assets. I was project manager, responsible for planning and coordination.
Health check app on-chain solution
An on-chain design with a token, identity NFTs and a DAO for a health check app. I handled design, development, testing, audit and documentation on my own.
Skills
Blockchain and security
- Solidity
- EVM
- Foundry
- Hardhat
- OpenZeppelin
- Smart contract audit
Front end
- Next.js
- React
- TypeScript
- Tailwind CSS
- Ethers.js
Back end and infrastructure
- Node.js
- Go
- PostgreSQL
- Supabase
- Docker
- REST API
Tools
- Git
- CI/CD
- AWS
- Web3.js
- Security research
- Vercel