Alex Beregszaszi

Dublin, Dublin 1, Hungary

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Summary

🤩

Rockstar

Alex Beregszaszi is a CTO and co-founder with 23 years of software engineering experience who now focuses on making Ethereum and Bitcoin more accessible. As Research Lead at the Ethereum Foundation’s Ipsilon team and a long‑time contributor across the Ethereum stack, he’s worked from low-level EVM and opcode changes (including EIP-3855/PUSH0 and deposit contract work) to Solidity, client integrations and developer tooling. He combines startup product leadership (Cantina, BLEND, Signatur) with deep embedded payments and cryptographic engineering experience, a mix that informs both secure firmware and protocol design. A prolific open-source maintainer active on projects like go-ethereum, ethereumjs, Remix, MetaMask and OpenZeppelin, Alex pairs practical CI/devops and documentation improvements with hands-on crypto implementation, and is based in Dublin while originally from Hungary.

23 years of coding experience

German, English, Hungarian

Stackoverflow

Stats

161reputation

113reached

4answers

0questions

Github Skills (101)

documentations10

compiler-development10

datastructure10

testing10

bash10

ganache10

c1110

datastructures10

ruby10

c1710

security10

automation10

remix10

dns10

ci-cd10

Programming languages (26)

CCMakeMakefileIoWebAssemblyGoHTMLNunjucks

Github contributions (5)

ethereum/solc-js

Apr 2016 - Jan 2022

Javascript bindings for the Solidity compiler

Role in this project:

Full-stack Developer

Contributions:89 reviews, 397 commits, 284 PRs in 5 years 10 months

Contributions summary:Alex primarily worked on enhancing the JavaScript bindings for the Solidity compiler. Their contributions include importing and integrating external Solidity compiler versions from various sources. They implemented features such as downloading compiler versions from the solc-bin GitHub repository, creating standard JSON compilation, and improving the bytecode linking functionality. The user also performed code formatting and refactoring tasks to improve code quality.

ethereumjavascriptblockchaincompilersolidity

ethereumjs/ethereumjs-util

Nov 2015 - Apr 2018

Project is in active development and has been moved to the EthereumJS monorepo.

Role in this project:

Back-end Developer

Contributions:1 review, 98 commits, 49 PRs in 2 years 5 months

Contributions summary:Alex primarily contributed to the core functionality of the `ethereumjs-util` library, introducing critical cryptographic helpers. Their work included implementing SHA256, RIPEMD160, and Keccak (SHA3) hashing algorithms, as well as creating functions for checksum address generation and validation. Furthermore, the user added helper functions for padding and truncating buffers and also included testing around twos complement. They also introduced a shorthand to hash RLP encoding.

reactmonorepodappethereumjavascript

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