Alex Xiong
Engineer at Zcash
Singapore
Summary
🤩
Rockstar🎓
Top SchoolAlex Xiong is an engineer with nine years' experience specializing in applied cryptography, privacy, and blockchain, currently working on Project Tachyon at Zcash. Previously a Senior Cryptography Engineer at Espresso Systems, he contributed to core ZKP work—implementing PLONK primitives and no_std-compatible SNARK traits in Rust for the Jellyfish project—demonstrating deep systems-level and cryptographic engineering. He has taught blockchain technology at NTU and led student initiatives as co-founder and president of Blockchain@NTU, blending research, teaching, and hands-on development. Comfortable across research and production, Alex has a track record of shipping secure, privacy-preserving protocols and low-level cryptographic components while also mentoring the next generation of blockchain engineers. He is based in Singapore and holds engineering degrees from NTU and a Master’s-level computing background from NUS in infocomm security.
9 years of coding experience
8 years of employment as a software developer
Master of Computing (Infocomm Security Specialization) Computer Science, Master of Computing (Infocomm Security Specialization) Computer Science at National University of SingaporeBachelor's Degree Electrical and Electronics Engineering, Bachelor's Degree Electrical and Electronics Engineering at Nanyang Technological University Singapore
Github Skills (5)
circuit10
rust10
cryptography10
rust-no-std8
nox8
Programming languages (20)
Github contributions (5)
EspressoSystems/jellyfish
Jan 2022 - Jan 2023
A Rust Implementation of the PLONK ZKP System and Extensions
Role in this project:
Back-end Developer
Back-end DeveloperContributions:368 reviews, 33 commits, 128 PRs in 1 year
Contributions summary:Alex primarily contributed to the core logic of the Jellyfish project, focusing on the PLONK ZKP system implementation. Their work includes deriving the `Debug` trait for error types and refactoring SNARK traits to align with no_std compliance. The user also introduced the `BoolVar` struct and added methods for boolean operations within the circuit. Furthermore, the commits show involvement in the modular arithmetic for the circuit, and integration of the PRF API.
cryptographyzkprustcryptanalysisblockchain
alxiong/.doom.d
May 2019 - Jan 2021
Contributions:18 commits, 5 pushes in 1 year 8 months
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