Johnny Jiang
Founder at Vastlink
Sydney, New South Wales, Australia
Summary
🤩
Rockstar🎓
Top SchoolJohnny Jiang is a founder and seasoned software engineer with 11 years of experience building mobile and blockchain products from Sydney. He leads Vastlink, a PayFi ecosystem and previously founded J Labs to advance next-gen MPC wallets, bringing hands-on expertise in iOS apps and cross-chain wallet libraries. Johnny contributed to high-profile open-source projects like Trust Wallet (iOS) and wallet-core, adding Cosmos SDK support and improving mobile UX and persistence—work that bridges secure cryptography, staking, and real-world wallet usability. His background spans banking-grade mobile systems at Suncorp to leading product and development teams across startups and investments, giving him a rare mix of enterprise discipline and startup execution. Notably, he combines deep mobile and backend skills with practical blockchain integrations, making him fluent in shipping secure, production-grade crypto wallets.
11 years of coding experience
23 years of employment as a software developer
Bachelor's degree Computer Science, Bachelor's degree Computer Science at Yunnan University
English, Chinese
Stackoverflow
755reputation
118kreached
4answers
23questions
Github Skills (22)
c-language10
ios10
mobile-development10
tendermint10
cosmos10
cryptocurrency10
realm10
blockchain10
swift10
cprogramming-language10
unit-testing9
bitcoin8
bitcoins8
64-bit6
jpa6
Programming languages (15)
Github contributions (5)
trustwallet/trust-wallet-ios
Mar 2018 - Jun 2018
:iphone: Trust - Ethereum Wallet and Web3 DApp Browser for iOS
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:5 commits, 10 PRs, 1 push in 2 months
Contributions summary:Johnny primarily focused on developing and maintaining the iOS application. Their contributions involved implementing new features, such as a warning message when switching test networks, and integrating Realm for data persistence. They also addressed bug fixes, refactored code, and wrote unit tests to ensure the application's stability and functionality. Furthermore, the user made changes to the application's settings and token management functionality, contributing to the overall user experience.
browseriphonedappethereumblockchain
trustwallet/wallet-core
Mar 2019 - Jun 2019
Cross-platform, cross-blockchain wallet library.
Role in this project:Back-end Developer
Back-end DeveloperContributions:10 commits, 14 PRs, 66 comments in 2 months
Contributions summary:Johnny primarily focused on adding support for the Cosmos SDK within the wallet-core library. Their contributions involved implementing Cosmos address support, integrating staking functionality, and supporting transaction signing. These changes included modifying the codebase to accommodate Cosmos-specific data structures, message types, and transaction formats, enhancing the library's capabilities for handling Cosmos-based blockchain interactions.
wallet-libraryblockchain-walletethereumblockchainwallet
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