Chris Ziogas
Founder at OnchainProbe
Larissa, Thessaly and Central Greece
Summary
👤
Senior🎓
Top SchoolChris Ziogas is a founder and seasoned blockchain core developer with 12+ years of hands-on experience spanning blockchain protocols, full-stack web, and native iOS apps. He has driven major performance and compatibility improvements in high-profile projects like go-ethereum and core-geth—optimizing tracer performance by orders of magnitude and fixing critical race conditions in the EVM runtime. Currently building OnchainProbe to automate RPC testing for node operators and L2/L3 teams, he combines product, architecture and engineering leadership with deep systems-level expertise in Go and TypeScript. Comfortable across frontend, backend and protocol layers, he’s shipped mainnets, wallets and tooling while contributing to well-known open-source projects and libraries. Based in Larissa, Greece, he balances technical rigor with a pragmatic focus on reliability and observable infrastructure—and is a proud husband and father of two.
12 years of coding experience
14 years of employment as a software developer
Bachelor of Engineering (B.Eng.), Department of Mechanical Engineering, Bachelor of Engineering (B.Eng.), Department of Mechanical Engineering at Higher Technological Educational Institute of LarisaMaster of Science (MSc), Advanced Industrial and Manufacturing Systems, Master of Science (MSc), Advanced Industrial and Manufacturing Systems at Higher Technological Educational Institute of Piraeus
Greek, English
Stackoverflow
86reputation
8kreached
6answers
0questions
Github Skills (39)
git10
ios10
tracer10
back-end-development10
testing10
wordpress10
evm10
user-authentication10
authentication10
mergetool10
php10
go10
ethereum10
blockchain10
hybridauth10
Programming languages (17)
Github contributions (5)
etclabscore/core-geth
May 2021 - Jan 2023
A highly configurable Go implementation of the Ethereum protocol.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 releases, 336 reviews, 123 commits in 1 year 7 months
Contributions summary:Chris primarily worked on fixing merge conflicts and refactoring code related to Ethereum tracers within the `core-geth` repository, a Go implementation of the Ethereum protocol. Their contributions involved adapting the tracers code to the new go-ethereum standards. Additionally, the user's work included adding and modifying code related to the `params`, `consensus`, and `eth` packages, mainly by fixing merge conflicts and implementing new configurations for the MergeForkBlock. These changes suggest a focus on maintaining and enhancing the core functionality of the Ethereum protocol implementation.
golangrpcgethconfigurableethereum-network
yankodimitrov/SwiftPasscodeLock
Aug 2015 - Oct 2015
An iOS passcode lock with TouchID authentication written in Swift.
Role in this project:Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:11 commits, 6 PRs, 44 comments in 2 months
Contributions summary:Chris primarily focused on enhancing the SwiftPasscodeLock library, a passcode lock implementation for iOS. Their work included making key classes and methods public for framework compatibility, enabling customization by allowing overriding of localization strings and the XIB for UI changes. They also improved TouchID integration by providing a fallback button title and better view presentation handling.
lockauthenticationswiftiospasscode
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