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A human smart contract instance deployed on earth chain.

Total time coded since Jun 7 2021

My name is CJ, a developer who is interested and specialized in Rust, C++, TypeScript, Solidity, Go.

There are many things that I find interesting, but if picking those I focus on most, then it would be:

  • 1️⃣ incrementally verifiable and private computation with ZK and MPC (Cryptography)
  • 2️⃣ derivatives, quant trading with machine learning (ML)
  • 3️⃣ parallel computing with software (Hadoop, Spark, Flink) and hardware (GPU/FPGA)
  • 4️⃣ secure blockchain scaling with data-availability sampling (DAS)
  • 5️⃣ programming language theory and virtual machine (PL, VM)

I graduated from SHU and obtained my Master degree in Réseaux et Télécommunications from UTT, France.
During my five-year stay in France, I led the RealTime Indoor Location System (RTLS) at @Ubudu.
Subsequently, I headed the Blockchain Development at @ParaSpace.
Currently, I'm working as a ZK Engineer at @QEDProtocol.

I was ranked #74 on wakatime leaderboard, you can find my current ranking by searching Cheng JIANG.


  • Parallel : A decentralized lending & staking protocol built on top of the Polkadot ecosystem (Rust)
  • ParaSpace : A cross-margin ERC20/ERC721 lending & trading & staking protocol (Solidity)
  • Casbin RS : An authorization library that supports access control models like ACL, RBAC, ABAC in Rust (Rust)
  • Plonky2.5 : A plonky2 verifier for plonky3 (Rust)
  • L2-Core : L2O Reference Implementation for zkApps on Bitcoin (Rust)
  • Diesel Adapter : Casbin adapter for mysql, postgres, sqlite based on Diesel (Rust)
  • Sqlx Adapter : Casbin adapter for mysql, postgres, sqlite based on Sqlx (Rust)
  • Json Rules Engine : Full featured json rules engine (Rust)
  • Actix Elastic : An actix actor for elasticsearch v7 (Rust)
  • D3 Vs : Vue Visualisation Package using d3.js and leaflet (VueJs, d3-js, Leaflet)
  • Layout Grid : Layout grid system in VueJs (VueJs)
  • ElsQuery : Full featured elasticsearch query generator (inspired by Kibana) (VueJs)
Contributions Metrics Activity Metrics

Cheng JIANG's Projects

30min_guides icon 30min_guides


6.824-lecture-notes icon 6.824-lecture-notes

6.824 Distributed Systems: Lecture notes (edited a little and formatted with Markdown)

aave-v3-core icon aave-v3-core

This repository contains the core smart contracts of the Aave V3 protocol.

acala icon acala

Acala - cross-chain DeFi hub and stablecoin based on Substrate for Polkadot and Kusama. icon

A pure Unix shell script implementing ACME client protocol

actix-net icon actix-net

framework for composable networking services

actix-raft icon actix-raft

An implementation of the Raft consensus protocol using the actix Actor framework.

actix-web icon actix-web

Actix web is a small, pragmatic, and extremely fast rust web framework.

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