Stefan Deml
Co-Founder & CTO at Decentriq
Zurich, Zurich, Switzerland
Summary
🤩
Rockstar🎓
Top SchoolStefan Deml is a Zurich-based Co-Founder and CTO with nine years of experience building privacy-first enterprise SaaS and cryptographic systems. He co-founded Decentriq, a confidential computing data clean room platform trusted by industry leaders and a founding member of the Confidential Computing Consortium, blending product vision with deep engineering leadership. Stefan's background spans applied cryptography at the Ethereum Foundation—contributing low-level zkSNARK work such as SHA256 gadgets to the well-known ZoKrates project—through to leading product and data engineering teams at Teralytics. He combines rigorous academic training from ETH Zurich in mechanical engineering with hands-on startup building, from renewable energy spin-offs to production in-car apps at BMW. Notably, he pairs applied cryptography and security engineering with a pragmatic focus on turning sensitive data into auditable, collaboration-ready products.
8 years of coding experience
7 years of employment as a software developer
MSc ETH Mechanical Engineering, MSc ETH Mechanical Engineering at ETH ZürichBSc ETH Mechanical Engineering Energy Flows and Processes, BSc ETH Mechanical Engineering Energy Flows and Processes at ETH Zurich
Github Skills (5)
zksnark10
rust10
sha10
cryptography10
ethereum9
Programming languages (15)
Github contributions (5)
Zokrates/ZoKrates
Sep 2018 - Oct 2019
A toolbox for zkSNARKs on Ethereum
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:137 commits, 26 PRs, 72 pushes in 1 year
Contributions summary:Stefan contributed significantly to the core functionality of the zkSNARK toolbox, "zokrates/zokrates." Their work involved implementing cryptographic gadgets for SHA256 hashing, particularly focusing on an Ethereum-specific SHA256 variant. This included building constraints, witnesses, and integrating libsnark gadgets to provide verifiable computation. The user's changes also touched upon supporting multiple libsnark gadgets.
snarkethereumverifiable-computationtoolboxzero-knowledge
stefandeml/zokrates-pycrypto
Feb 2019 - Jun 2019
Contributions:42 commits, 2 PRs, 39 pushes in 3 months
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