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Simon Jentzsch

PROFILE

Simon Jentzsch

Simon contributed to the ethereum/kohaku-commons and NethermindEth/nethermind repositories, focusing on stability, security, and privacy in blockchain workflows. He upgraded dependencies and refactored core modules to support state-specific access lists, using TypeScript and JavaScript for backend and API development. In kohaku-extension, Simon implemented transaction simulation features to enhance on-chain privacy testing. His work included security hardening of Colibri RPC by enforcing stricter verification and EIP-1193 compliance, as well as comprehensive unit testing to validate new behaviors. Simon’s engineering demonstrated careful architectural alignment, robust dependency management, and a focus on maintainability across both smart contract and full stack development.

Overall Statistics

Feature vs Bugs

80%Features

Repository Contributions

5Total
Bugs
1
Commits
5
Features
4
Lines of code
509,122
Activity Months2

Your Network

104 people

Shared Repositories

104

Work History

March 2026

3 Commits • 2 Features

Mar 1, 2026

March 2026 monthly summary focusing on delivered value and technical achievements across Nethermind and Kohaku Commons. Key work delivered includes an Ethereum RPC feature enabling state-specific access lists via CreateAccessList(stateOverride), security hardening of Colibri RPC, and a dependency upgrade to keep libraries up-to-date. The work emphasizes business value through precise access control, improved security posture, and maintainability, while showcasing architectural refactoring and robust testing.

February 2026

2 Commits • 2 Features

Feb 1, 2026

February 2026 performance summary focused on delivering stability and testing capabilities across two core Kohaku repos. Achievements centered on dependency stability in kohaku-commons and enhanced on-chain privacy testing workflows in kohaku-extension, with cross-repo alignment to support end-to-end flows.

Activity

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Quality Metrics

Correctness92.0%
Maintainability84.0%
Architecture88.0%
Performance84.0%
AI Usage32.0%

Skills & Technologies

Programming Languages

C#JavaJavaScriptRubySolidityTypeScript

Technical Skills

API developmentAndroid developmentEthereumJavaScriptNode.jsReactSolidityTypeScriptbackend developmentblockchain developmentdependency managementfront end developmentfull stack developmentsmart contract developmentunit testing

Repositories Contributed To

3 repos

Overview of all repositories you've contributed to across your timeline

ethereum/kohaku-commons

Feb 2026 Mar 2026
2 Months active

Languages Used

SolidityJavaScriptTypeScript

Technical Skills

EthereumSolidityblockchain developmentsmart contract developmentAPI developmentJavaScript

ethereum/kohaku-extension

Feb 2026 Feb 2026
1 Month active

Languages Used

JavaJavaScriptRubyTypeScript

Technical Skills

Android developmentNode.jsReactfront end developmentfull stack development

NethermindEth/nethermind

Mar 2026 Mar 2026
1 Month active

Languages Used

C#

Technical Skills

API developmentbackend developmentunit testing