Blockchain Protocol Engineering & Upgrade Services

Zondax delivers deep protocol engineering services covering the design, development, and optimization of blockchain protocols for foundations, protocol teams, and DeFi projects requiring low-level systems expertise.

Service Overview

Zondax's protocol engineering practice spans the full stack of blockchain protocol work: core consensus modifications, smart contract VM implementations and SDKs, cross-chain interoperability solutions, protocol upgrade planning, and developer ecosystem tooling. With a track record across 50+ blockchain protocols, Zondax brings unmatched depth in systems-level engineering using Rust, Go, C, C++, TypeScript, AssemblyScript, and more.

What's Included

• Consensus mechanism design and modification
• Smart contract VM implementations and SDKs (e.g., FVM AssemblyScript SDK, FEVM Solidity pre-compiles)
• Cross-chain interoperability adapters and bridges (e.g., ICP-EVM Proxy)
• Filecoin Solidity Libraries enabling smart contracts to call built-in actors natively
• Publicly verifiable randomness integrations (e.g., Drand with threshold cryptography)
• Alternative host node research and implementation (e.g., Polkadot Hybrid Host Node)
• Chain upgrade coordination including hard forks, runtime upgrades, and consensus changes
• Pre-upgrade compatibility assessment across ecosystem tooling
• Coordinated communication with validators, exchanges, and wallet providers
• Technical support during upgrade windows and post-upgrade monitoring

Chain Upgrade Coordination

Blockchain network upgrades require careful coordination across validator sets, wallet providers, exchanges, and other ecosystem participants. Zondax provides technical leadership to manage these complex multi-stakeholder upgrade processes, with experience on networks including Filecoin (NV27 'Golden Week' upgrade) and Polkadot ecosystem chains.

Why Choose Zondax

Founded in 2017 and headquartered in Zug, Switzerland, Zondax has successfully delivered engineering work across more than 50 blockchain protocols for clients including Protocol Labs, Web3 Foundation, Dfinity, Ledger, Zcash Foundation, Cosmos, Tezos Foundation, and Avalanche. Their natively remote team of experienced systems programmers and open-source contributions make them the go-to partner for technically demanding protocol-level blockchain engineering.