Our Team

Daniel Luca, Security Engineer

We are the music makers and we are the dreamers of dreams.

—Ode by Arthur O'Shaughnessy

Daniel is a self-taught developer with experience in multiple programming languages. Having a hacker mindset he always tests the limits of software or hardware he interacts with. He likes to experiment with new technologies, always trying to develop his available toolchain. When he isn't glued to a computer screen, he likes to snowboard, read and meditate. He currently does security audits and builds tools for ConsenSys Diligence and the Ethereum ecosystem.

Gonçalo Sá, Security Engineer

If you can't explain it to a six year old, you don't understand it yourself.

—Albert Einstein

Gonçalo is a passionate hacker since he can remember. Disassembling stuff was always his business, either online or at home. He founded 3 different startups (AdTech, BioTech, Mobile App) but when he realized his real love was decentralization, he turned to Ethereum and never looked back. Since then he has become an unapologetic technocrat that really believes in humanity with a little help from smart contracts. Whenever he’s able, you’ll find him writing or exploiting solidity code, climbing or playing paddle.

John Mardlin, Security Engineer

The art of living is more like wrestling than dancing.

—Marcus Aurelius

John (aka Maurelian) is a security engineer, and a founding member of ConsenSys Diligence. He is a regular writer and speaker on smart contract security. Prior to joining ConsenSys, John worked at Coinbase.

Martin Ortner (tintinweb), Security Engineer

breaks your things ❤

A passionate Information Security expert with a background in Software Engineering, Software Quality Management and Automation, Software Vulnerability Research and Exploitation as well as Information Security Management that joined the Blockchain/DLT ecosystem to push for security.

Sergii Kravchenko, Security Engineer

Once you stop learning, you start dying.

—Albert Einstein

Sergii is a very talented hacker, he has been a big fan of math and algorithms since early childhood. Before joining ConsenSys Diligence he spent years developing complex high-frequency trading systems. Sergii was also doing machine-learning research and created a few fully automated hft strategies. While auditing he’s aiming to find the most complex and sophisticated ways to hack the system in order to secure it.

Shayan Eskandari, Security Engineer

The best time to plant a tree was twenty years ago, the second best time is now.

Shayan is a hacker with a thirst for knowledge. While conducting security research at Dilligence, He's doing his PhD in Information systems on blockchain and evolution of crime. He was formely working as Blockchain Engineer building Bitcoin ATM backend services and enterprise wallets. He has been doing research on Bitcoin (and later blockchain tech) since 2012.

Steve Marx, Security Engineer

Programming is typing one thing and if that doesn't work typing a different thing.

—Steve Marx

Steve built programtheblockchain.com and capturetheether.com before joining ConsenSys. He now works primarily on smart contract audits. Prior to his Ethereum work, he worked in various roles at Microsoft and Dropbox and cofounded Site44.

Valentin Wüstholz, Security Researcher

Simplicity is prerequisite for reliability.

Valentin has many years of experience in developing tools and techniques that allow us to produce more reliable and correct software. He received a Ph.D. in Computer Science from ETH Zürich and has been a lead developer for several software analysis tools over the years. Before joining ConsenSys, he built a system for identifying correctness, security, and performance issues in Ethereum smart contracts.