Looking for a job

Tim Fan

@timfan

Message

Blockchain protocol security researcher focused on Ethereum P2P, who contributed to D2PFuzz's cross-client testing.

Germany

Message

What I'm looking for

I'm looking for Berlin-based or remote opportunities in protocol engineering, security research, or crypto protocol and fundamental research. I value experienced teammates, thoughtful feedback, and technically rigorous projects.

My work on D2PFuzz connected Ethereum DevP2P fuzzing with protocol-aware message mutation and cross-client differential testing. I contributed to research design, issue disclosure, and team coordination, and co-presented Ethereum P2P fuzzing work at Devcon SEA 2024.

At Beihang University, I researched on-chain governance for blockchain upgrades, including protocol-version compatibility and Byzantine-resilient governance. I also contributed to a geth-based EVM client and, as CTO at 棋弈科技, planned software development and implemented Python and C++ functionality for a brain-computer interface rehabilitation demo.

Experience

Work history, roles, and key accomplishments

Blockchain Engineering Intern

正定私募

Jan 2023 - Jan 2023 (0 months)

Three-month internship in mid-2023, contributing to a low-latency EVM-compatible client based on geth.
• Contributed to client design and development, with work on transaction propagation and the networking/execution pipeline.
• Gained practical experience with Ethereum execution-layer internals, transaction processing, and latency-related engineering tradeoffs.

Chief Technology Officer (CTO)

棋弈科技

Jan 2019 - Jan 2020 (1 year)

Full-time CTO role at an early-stage company developing brain-computer interface and robotic-arm software for upper-limb rehabilitation. Approximately one year, beginning in 2019.
• Planned software development and contributed hands-on Python and C++ implementation for BCI and robotic-arm functionality.
• Worked within a four-person technology team, including myself, to build a BCI-driven rehabili

Education

Degrees, certifications, and relevant coursework

Beihang University

Doctor of Philosophy - PhD, Cybersecurity

2019 - 2025

Doctoral research on on-chain governance for blockchain system upgrades, covering collective decision mechanisms, protocol-version compatibility and upgrade scheduling, and Byzantine-resilient governance data consistency.

Dissertation: Research on Key Technology of On-chain Governance for Blockchain System Upgrade.
Advisor: Prof. Wu Qianhong.
Integrated master's-to-doctoral program; PhD completed