jossduff.com

Hi!

I graduated with honors from Lehigh University in 2023 with a B.S. in Computer Science and Business.

Currently I'm pursuing a M.S. in Computer Science at Lehigh focusing on proving regulatory compliance while maintaining privacy.

I believe in the potential for blockchain technology to create a more fair financial system.

You can reach me at jduff360@gmail.com.

github linkedin resume twitter

Experience

Lehigh University, PA, USA

Jun 2025 – Present
Research Assistant and Student

Sigil L2 - link

Sep 2024 – Sep 2025
Founding Engineer
  • Built open-source SP1 prover network for <10% the cost of Succinct's prover network
  • Maintained OP Stack rollup with ZK execution proving via op-succinct
  • Developed easy-to-use docker-compose setup for running RPC or Sequencer nodes

Envio - link

Oct 2023 – Sep 2024
Software Engineer
  • Implemented Ethereum JSON RPC read interface on custom database
  • Extended EVM-compatible custom database to support alternate VMs and chains
  • Deployed and maintained production, staging, and backup Kubernetes clusters on bare-metal servers

Projects

zkSTF - link

In Progress
  • Exploring throughput increases for BFT consensus by replacing state transition function re-execution validation with a zero-knowledge proof

tbex - link

Dec 2025
  • Locally hosted terminal block explorer for Ethereum

Warp Toad - link

Jun 2025
🏆 Won Noir Hack 3rd Place + Grant Recipient
  • Cross-chain privacy mixer enabling anonymous deposits and withdrawals across chains
  • Bridged Merkle roots to and from Aztec L2 and EVM chains

Ultra Anon - link

Apr 2025
🏆 Won ETH Denver + Celebrity Judge Award
  • Privacy token with public and private state featuring an extremely viral anonymity set and full plausible deniability

Cafe Justo - link

Jan – Dec 2022
🏆 Won Best Overall — Lehigh CS Capstone Fair
  • Blockchain solution for tracking wages of coffee laborers in El Salvador
  • Deployed Solidity smart contract on Ethereum Goerli testnet and subgraph on theGraph network

Community & Teaching

Guest Lecture — Kutztown University, PA, USA

2026
  • Lecture on Layer 2 scaling solutions

Panel Moderator — Devconnect Buenos Aires

2025
  • "The Privacy Stack: Who Sees What, When and With Whose Consent"

Guest Lecture — Lehigh University, PA, USA

2022
  • Lecture on smart contract domain-specific languages

Lehigh Blockchain Club — President

Oct 2021 – May 2022
  • Led educational discussions on blockchain and cryptocurrency topics
  • Recruited 100+ members