Andrii Kliui
System Administrator
Kyiv, Ukraine
Summary
🤩
Rockstar🎓
Top SchoolAndrii Kliui is a Kyiv-based systems administrator turned developer with 10 years of IT experience spanning infrastructure, web administration, and frontend/backend development. He manages Proxmox VE and CephFS clusters, enterprise backups and cross-platform user environments while also building interactive front-end experiences and onchain apps with Solana and Rust. Andrii has contributed backend enhancements to web3j—adding HSM support, chain ID handling, address validation and EIP-1559 improvements—demonstrating a blend of security-minded systems work and blockchain integration. Comfortable across Linux, macOS and Windows, he pairs hands-on ops discipline with practical programming skills and a curiosity rooted in both geography and formal Java training.
10 years of coding experience
14 years of employment as a software developer
GromcodeJava Developer, Java Developer at CyberBionic SystematicsMaster's degree, Geography, Master's degree, Geography at Taras Shevchenko National University of Kyiv
Github Skills (7)
javas10
smart-contracts10
ethereum10
java10
blockchain10
testing10
solidity9
Programming languages (11)
Github contributions (5)
LFDT-web3j/web3j
Jan 2022 - Nov 2022
Lightweight Java and Android library for integration with Ethereum clients
Role in this project:
Back-end Developer
Back-end DeveloperContributions:38 reviews, 64 commits, 42 PRs in 10 months
Contributions summary:Andrii focused on enhancing the `web3j` library, specifically by implementing features related to HSM (Hardware Security Module) integration. They added unit tests and refactored existing code to support HSM functionality. Moreover, the user modified the code to incorporate chain ID support and address validation, and they updated ENS contracts and wrappers, and improved the functionality of EIP-1559 transactions.
ethereumrxjavasmart-contract-toolsblockchainandroid-library
web3j/Intellij-solidity-debugger
Feb 2022 - Apr 2022
Contributions:26 commits, 2 pushes in 2 months
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