Protocol Security Researcher

As a Protocol Security Researcher at the Ethereum Foundation, you help prevent vulnerabilities from reaching Ethereum mainnet. You work across the execution layer, consensus layer, networking, specifications, testing, and client implementations to identify security issues before they become production incidents. Your work combines deep protocol knowledge with security research, manual review, fuzzing, AI-assisted analysis, audits, and coordinated disclosure.

What you'll do

• Conduct AI-assisted security research and automated bug discovery
• Review upcoming hardforks for security risks
• Find vulnerabilities across Ethereum protocol implementations
• Build and improve fuzzers
• Improve the team's automation and security tooling
• Perform manual security review of Ethereum protocol changes
• Work closely with Protocol DevOps, Specifications, researchers, and protocol implementers
• Coordinate responsible disclosure
• Support external audits and audit competitions

What you bring

• Deep familiarity with the execution layer or consensus layer
• Deep familiarity with EL or CL specifications
• Experience implementing or reviewing protocol changes
• Strong understanding of Ethereum networking, consensus, or execution internals
• Security experience in one or more of: AI-assisted security workflows, protocol security research, fuzzing, vulnerability research, manual application security review, or building security tooling
• Proficiency in languages commonly used in protocol work, such as Go, Rust, Java, C#, Nim, or Python

About the Ethereum Foundation

The Ethereum Foundation is a global non-profit organization dedicated to supporting Ethereum and helping it remain secure, decentralized, and resilient over the long term by supporting critical protocol work and the broader ecosystem.