Nethermind is a blockchain research and engineering company with a focus on empowering enterprises and developers globally to innovate within decentralised systems. Headquartered in London, our flagship product, Nethermind Ethereum execution client, has since grown into the largest client securing over 30% of the Ethereum blockchain.
Nethermind offers strategic advisory and expertise to enterprises across Institutional DeFi, Blockchain Engineering, Tokenisation of Assets, Advanced Cryptography Research, Network Infrastructure, and AI Agent Frameworks, from initial concepts to successful implementation.
Founded in 2017 in London, Nethermind delivers advanced blockchain solutions that empower financial institutions globally to build and scale new business models in the digital asset economy. Our flagship product, the Nethermind Ethereum execution client, has grown to become the largest client securing over 30% of the Ethereum blockchain.
Nethermind’s growth has been marked by significant contributions to the digital assets and cryptocurrency ecosystem. We provide essential infrastructure tooling and developer resources while actively participating in community-led initiatives to promote blockchain adoption and innovation. Our partnerships with major industry players have resulted in the design and delivery of enterprise- grade solutions, from institutional DeFi to advanced Layer 2 scaling.
Our achievements include substantial contributions to the Ethereum Merge with the Ethereum Foundation, supporting the transition of the network from Proof of Work to Proof of Stake; developing infrastructure and consensus-layer optimisations for Gnosis Chain; partnering with Flashbots to enhance Ethereum’s fairness and efficiency in transaction processing through MEV- Boost integration; auditing numerous high profile protocols by Nethermindʼs Security team. In addition, Nethermindʼs execution client has expanded to support numerous Layer 2s, including Taiko, Optimism, and Starknet, playing a crucial role in bridging L1 and L2 scalability. Our recent joint venture with Brevan Howard’s WebN group led to the development of Twinstake, a non- custodial staking provider serving enterprises and institutions. In 2024, as part of Nethermindʼs strategic expansion, weʼve established an office in Scotlandʼs capital Edinburgh lead by Nathan Jay, our Head of Hardware Development.
At Nethermind, we deliver trust, expertise, and value to help enterprises navigate and thrive in the evolving digital economy. Nethermindʼs aim is to solve some of the most challenging problems facing the blockchain industry today.
Tomasz Stanczak – Chief Executive Officer
Tomasz founded Nethermind in 2017 and led the development of the Nethermind Ethereum client, which secures over 30% of the Ethereum network. Under his leadership, Nethermind has grown to over 300 employees and established itself as a key infrastructure provider in the Ethereum ecosystem.
Joe Kohler – Chief Legal Officer and Chief Operating Officer
Previously Managing Director at Deutsche Bank where he co-headed Global Markets Legal, overseeing teams across FIC, Equities, Global Credit Trading and Emerging Markets. At Nethermind, he structures the company’s institutional partnerships and oversees regulatory compliance across jurisdictions.
Antonio Sabado – Chief Growth Officer
As Nethermindʼs Chief of Growth, Antonio has scaled Nethermind from its first employee to over 300 people across research, engineering, and business development. His work includes establishing Nethermind’s partnerships with major financial institutions and Layer 2 protocols including Starknet, where he focuses on institutional adoption of ZK-rollups. Antonio is currently leading Nethermind’s expansion into on-chain AI and agentic systems.
Nathan Jay – Head of Hardware Engineering
Nathan Jay has an academic foundation in electronics and 2D materials, holding an MEng from the University of York and an MRes from the University of Cambridge. He pursued a PhD in flexible electronics for neural interfacing at Cambridge before leaving to co-found a bioelectronics startup. His research background includes working with graphene and other 2D materials. Nathan is currently building Nethermindʼs Hardware team in Edinburgh working on projects at the intersection of robotics, AI, identity, and blockchain.
Alvin Su – Head of Enterprise & DeFi Engineering
Architected Nethermind’s institutional DeFi solutions after leading quantitative technology development at BNP Paribas Asset Management. Alvin hosts deep expertise in the traditional financial sector, leading Nethermindʼs institutional and enterprise solutions strategy.
Tomasz Kurowski – Group Manager, DeFi & Enterprise
Tomasz manages Nethermindʼs team working working on DeFi protocol development and enterprise blockchain solutions. He has led the implementation of major institutional features including cross-chain settlement systems and on-chain risk management frameworks. Previously Tomasz developed blockchain solutions for the Polish Ministry of Digital Affairs and Financial Supervision Authority. His current focus includes tokenisation frameworks for traditional financial assets and institutional staking infrastructure.
James Ball – Product Manager, Product & Ventures
Leads product development for Nethermind’s strategic projects and institutional offerings after developing prime services infrastructure at Copper and index products at Alongside. He directs Nethermind’s work with Flashbots on MEV research and block building, and is currently focused on private market solutions using secure compute environments, developing frameworks for institutional trading. In addition, James is responsible for managing Nethermind’s ventures into machine learning, trust-systems and secure hardware. Based in Edinburgh, James lead the establishment of Nethermind’s Scottish office which opened in 2024.
