Oleksandr Brezhniev
Chief Technology Officer at Privado ID (Formerly Polygon ID)
Ukraine
Summary
🤩
Rockstar🎓
Top SchoolOleksandr Brezhniev is a seasoned technology leader and CTO with nine years of focused experience in blockchain, self-sovereign identity (SSI), and zero-knowledge proof systems. He currently leads Privado ID (formerly Polygon ID) and has driven core state-management work for the Polygon zkEVM node, including in-memory state trees and Merkle storage—contributions that underpin production-grade L2 state handling. Prior roles span technical leadership at Polygon Technology, hands-on SSI architecture at iden3, and founding startups that shipped blockchain and identity products for enterprise and public-sector customers. Comfortable bridging research and delivery, he combines cryptographic engineering (Circom, SNARKJS) with large-scale system architecture and distributed team leadership. Based in Ukraine, he also brings entrepreneurial grit from multiple CTO/co-founder roles and a track record of turning complex identity and tokenization concepts into deployed proof-of-concepts and products.
9 years of coding experience
17 years of employment as a software developer
Information Technology, Information Technology at Lyceum of Information Technologies, DniproIT Dnipro BizSchoolMaster's degree Computer Engineering, Master's degree Computer Engineering at Oles Honchar Dnipro National UniversityFundamentals of Entrepreneurship, Fundamentals of Entrepreneurship at Draper University
English, Ukrainian
Github Skills (8)
go10
postgresql10
merkle-tree10
blockchain9
database-design9
ethereum9
smart-contracts9
testing8
Programming languages (15)
Github contributions (5)
0xPolygonHermez/zkevm-node
Nov 2021 - Jan 2022
Go implementation of a node that operates the Polygon zkEVM Network
Role in this project:
Back-end Developer
Back-end DeveloperContributions:11 commits in 2 months
Contributions summary:Oleksandr's primary contribution focuses on implementing the foundational structure of the state tree within the Polygon zkEVM node. This involves the creation of a `MemTree` as an in-memory implementation of the `StateTree` interface, including methods for managing balances, nonces, code, and storage, as well as related testing. Furthermore, they are involved in the development of a Merkle tree implementation and smart contract storage store which is critical for the project. These contributions are fundamental to the node's state management capabilities.
golangblockchainpolygon
0xPolygonID/js-sdk-tutorials
Feb 2023 - Jun 2024
Documentation for polygonid-js-sdk
Contributions:2 reviews, 1 PR, 3 pushes in 1 year 3 months
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