Protocol Engineer

Business Area / Department Overview

The Protocol Engineering team at our organization is responsible for the design, implementation, and evolution of the zkSync protocol. This includes both L1 and L2 components, from core contracts and verification systems to the zkSync smart contract platform — a zero-knowledge-friendly virtual machine powering zkSync Era.

Key Responsibilities Of Role

• Design and implement the zkSync smart contract platform (zk-friendly VM).
• Develop system contracts (Solidity, Yul) and server-side components for L1 and L2.
• Conduct independent research, design, prototype, and document solutions.
• Shape the protocol roadmap in collaboration with internal teams and external partners.
• Contribute to cross-functional discussions, ensuring secure and scalable protocol evolution.

Experience, Qualifications & Competencies

• Experience: 3–10 years in protocol, blockchain, or systems engineering depending on level.
• Hands-on experience with Solidity or Vyper.
• Technical Competencies: Strong understanding of blockchain/EVM protocols.
• Familiarity with Yul, Cast tools, Foundry etc is a strong plus.
• Proficiency in strongly typed languages (C++, Scala, Go); Rust experience a plus.
• Knowledge of Merkle Trees and related data structures.
• In-depth knowledge of algorithms, data structures, and computational complexity.
• Experience implementing data structures and algorithms from scratch.
• Understanding of cryptography, high-load systems, or protocol design a plus.
• Core Competencies: Ownership mindset with proven track record of delivering projects.
• Strong collaboration and communication skills.
• Passionate, curious, and motivated to make meaningful contributions.
• Fluent written and spoken English.