Demerzel Solutions Limited

To empower enterprises and developers worldwide to access and build on decentralized systems.

Nethermind builds critical infrastructure for Ethereum and Starknet ecosystems. Founded in 2017, the company operates the Nethermind Client, which secures approximately one-third of Ethereum's mainnet validators. With over 200 team members across 66+ countries, Nethermind works with protocols, enterprises, and financial institutions to develop blockchain infrastructure, conduct security audits, and advance cryptography research. The team contributes to core protocol development while providing institutional-grade services for organizations scaling on decentralized networks. Operating fully remote since inception, Nethermind emphasizes open-source development and deep technical work solving complex engineering problems in the web3 space.

Products

The flagship Nethermind Client is a high-performance Ethereum execution client built on .NET that secures a significant portion of the network. For Starknet, the company maintains Juno (a client) and Voyager (block explorer and analytics platform). Developer tools include Sedge for one-click validator setup, Clear for formal verification of Solidity contracts, and the recently launched AuditAgent for AI-powered smart contract auditing. Beyond software, Nethermind provides comprehensive consulting services including smart contract audits, formal verification, infrastructure management, and advanced cryptography research for protocols and enterprises.

Funding

Nethermind received an Ethereum Foundation grant in 2018 to develop its client implementation but has largely grown as a bootstrapped company. The firm generates revenue through blockchain consulting services, smart contract audits, and institutional partnerships rather than traditional venture capital. Beyond its core business, Nethermind operates an investment arm that funds Web3 startups, participating in seed rounds for projects like Valantis and PWN. The company continues to receive ecosystem grants, including recent Ethereum Foundation ZK grants, reflecting steady self-sustaining growth without reliance on external funding.

Recent news

In May 2026, Nethermind launched version 0.2.0 of its Arbitrum plugin, establishing a second independent execution client for the Arbitrum network to strengthen its fraud-proof mechanism.

Technology

Core development centers on .NET and C# for the Ethereum client, with extensive use of Solidity and Cairo for smart contract development and auditing. Go is heavily utilized for Starknet clients and libraries, while Rust powers performance-critical security tools. The team works directly with Ethereum Virtual Machine internals and the Yellow Paper for low-level protocol analysis. Infrastructure relies on Docker for containerization, with TypeScript used across various projects. Zero-knowledge cryptography, formal verification frameworks, and AI-assisted security tools round out the stack for protocol safety and scalability research.

Benefits

Fully remote-first culture with the flexibility to work from anywhere worldwide. Team members can choose their working hours and have the option to receive compensation in either fiat or cryptocurrency. The company provides equity participation, unlimited professional development through expert mentorship and training programs, and opportunities to contribute to open-source initiatives. Employees regularly attend global crypto events and conferences. With colleagues spanning 66+ countries, the collaborative environment emphasizes work-life balance while tackling challenging blockchain infrastructure problems.