Arthur Deygin
Smart Contract Audits, Bug Hunting & Development at Self-employed
Greater Sydney Area Australia
Summary
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Rockstar🎓
Top SchoolArthur Deygin is a smart contract auditor, bug hunter, and Solidity developer with nine years of experience spanning DeFi protocols and machine learning engineering. He previously audited at OpenZeppelin and contributed to core Synthetix contracts, delivering bug fixes and feature integrations that touched staking, collateral, and rewards logic for a major DeFi protocol. Comfortable moving between security review and hands‑on development, he also brings an ML systems background from AWS and Domain.com.au, where he built production recommender and real‑time personalization pipelines. Based in the Greater Sydney Area, he combines rigorous formal thinking from a B.Sc. in Physics & Mathematics with practical product delivery and incident response experience. Known for finding subtle protocol issues and improving CI robustness (e.g., resolving Slither crashes), he’s available for audits or contract development.
8 years of coding experience
6 years of employment as a software developer
B.Sc Physics & Mathematics (Talpiot), B.Sc Physics & Mathematics (Talpiot) at The Hebrew University of JerusalemMaster of Business Administration (MBA), Master of Business Administration (MBA) at Tel Aviv University
Github Skills (5)
smart-contracts10
solidity10
f10
ethereum10
blockchain10
Programming languages (14)
Github contributions (5)
Synthetixio/synthetix
Sep 2021 - Aug 2022
Synthetix Solidity smart contracts
Role in this project:
Back-end Developer
Back-end DeveloperContributions:264 reviews, 360 commits, 131 PRs in 11 months
Contributions summary:Arthur primarily focused on modifying Solidity smart contracts related to the Synthetix protocol. Their work involved bug fixes, such as addressing slither crashing in CI and local environments, and integrating new features by merging development branches. The user also updated existing contracts, as evidenced by changes to the ShortingRewards.sol, StakingRewards.sol, and Collateral.sol files, adding functionality to listen to system and synth suspensions and modifying code parameters. These changes suggest a focus on the core logic and functionality of the DeFi platform.
synthetixethereumblockchainsoliditysmart-contracts
DomainGroupOSS/ml-recsys-tools
Mar 2018 - Apr 2019
Contributions:387 commits, 376 pushes, 3 branches in 1 year
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