Ceyhun Onur
Senior Software Engineer at Ava Labs
Istanbul, Türkiye Turkey
Summary
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Rockstar🎓
Top SchoolCeyhun Onur is a senior software engineer with 10 years of experience specializing in blockchain systems, currently contributing to Avalanche's core stack (AvalancheGo, Coreth, Subnet-EVM) from Istanbul while pursuing an MSc at Boğaziçi University. He has a strong backend focus in Go and Ethereum tooling—refactoring state transitions, integrating coreth updates, and adding chain configuration features for production-grade nodes. Prior work includes building trading engines, ERC-1404 smart contracts, Bitcoin wallet integrations and academic research on IoT–blockchain interplay, showing both product and research fluency. Comfortable across languages and architectures, he blends rigorous testing and configuration-driven design to improve robustness in distributed ledger clients. An often overlooked detail: he has hands-on experience hardening database and RPC interactions in major open-source Ethereum forks, demonstrating deep familiarity with node internals and real-world blockchain deployments.
10 years of coding experience
5 years of employment as a software developer
Bachelor’s Degree, Computer Science, Bachelor’s Degree, Computer Science at University of EssexBandırma Anatolian Teacher High SchoolBachelor of Science - BS, Computer Science, 2.8, Bachelor of Science - BS, Computer Science, 2.8 at Koç UniversityMaster of Science - MS, Computer Engineering, 3.8, Master of Science - MS, Computer Engineering, 3.8 at Boğaziçi University
Turkish, English, Russian
Stackoverflow
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Github Skills (18)
testing10
evm10
configuration-management10
chain10
rpc10
go10
ethereum10
blockchain10
file-handling10
database-management10
apidoc9
api9
error-handling9
smart-contracts8
architectures8
Programming languages (11)
Github contributions (5)
ava-labs/subnet-evm
Jan 2022 - Jan 2023
Launch your own EVM as an Avalanche Subnet
Role in this project:
Back-end Developer
Back-end DeveloperContributions:18 releases, 1329 reviews, 195 commits in 1 year
Contributions summary:Ceyhun primarily focused on making core changes to the `subnet-evm` project, which involves building an EVM on an Avalanche Subnet. The user's contributions included refactoring code related to block repair and state transitions, and modifying the fee configuration to enable fee recipients. Moreover, the user integrated coreth-0.8.16 changes.
avalancheethereumblockchainevmsmart-contracts
ava-labs/coreth
Jun 2021 - Nov 2022
Code and wrapper to extract Ethereum blockchain functionalities without network/consensus, for building custom blockchain services.
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 releases, 438 reviews, 23 commits in 1 year 6 months
Contributions summary:Ceyhun primarily focused on enhancing the core functionalities of the `coreth` project, particularly concerning the configuration and initialization processes. They implemented features to read, parse, and apply configuration bytes, ensuring proper integration with the existing CLI parameters. Furthermore, they refactored code related to parameters and default settings, and added tests to validate the changes, demonstrating a focus on code quality and reliability. The user also contributed to the test suite by creating new tests and refactoring existing ones to incorporate the configuration updates.
consensusethereumavalancheblockchainevm
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