Weiji Guo
A cryptography engineer. I proposed the OP_ZKP initiative back in 2023.
Founder · Shanghai, China
Open to advisory
Product · Engineering & Tech
Makes warm intros to
5
Hours / month
About Weiji
I am experienced in multiple software engineering domains: payment, cryptography engineering and blockchain, database and backend systems. I had worked in PayPal, ApplePay, American Express before. In 2023 I proposed the OP_ZKP upgrade to bring eventual Turing completeness thus more programmability to Bitcoin. I founded the Lightec Labs to push forward the proposal, and successfully launched the zkBTC project, which bridges Bitcoin to Ethereum based on ZKP as a potential application of the proposal. Now I am working on a new project which builds a Bitcoin-based chain for stable coin payment and implements the OP_ZKP proposal.
Company
LIGHTEC LABS
www.lightec.xyz
LIGHTEC LABS is innovating Southeast Asian and China-US cross-border e-commerce and remittance services using advanced blockchain, robust security, and competitive fees. They are focused on stablecoin payment solutions.
Funding Stage
Pre-Seed
Funding Raised
None/Bootstrapped
Team Size
1-5 employees
Annual Revenue
$0 to $100k
Founded
2023
Industry
Technology
Skills
Software Engineering
20+ years developing backend systems, database, cryptography engineering. blockchain.
Cryptographic Engineering
I contributed BLS12-381 G2 signature verification circuit to gnark. I developed SMGo, a constant time implementation of SM4 (in assembly for amd64 and arm) and SM2.
Experience
milestone
Founder and CEO
Lightec Labs
In this position so far, I had assembled a small engineering team, taught some of them how to do ZKP coding, led the team through the development of zkBTC, and personally developed the most critical components.
1) zkBTC went live July 2025, bridging Bitcoin and Ethereum using Zero-Knowledge Proof technology. No security incidents so far. 2) My PR (BLS12-381 G2 signature verification circuit) to gnark was merged Sept 2025, along with some other PRs from my team merged earlier. 3) I developed chainark, a ZKP library to prove a chain of relationship with unlimited length.
milestone
Technical Expert
bilibili
During the NFT fever, bilibili (Nasdaq: BILI) delved into blockchain business. They need a cryptography expert so I joined the team.
1) Led the team to develop a MPC+TEE-based team asset management platform. 2) Developed SMGo, a highly performant and secure implementation of Chinese cryptography algorithms.
job
Senior Software Engieneer
Apple
The ApplePay project.
server engineering
job
Director of Innovative Technology
American Express (China)
Research into potential application of advanced/innovative technology in AE's business: MPC, TEE, FHE, federated learning, etc.
job
Senior Software Engieneer
Apple
The ApplePay project.
server engineering
job
Staff Software Engineer
PayPal
software engineering in the risk platform