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Chainway Labs Logo Chainway Labs · IT - Software Development

Senior Protocol Engineer

· Job Posted December 07, 2025
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Job Description

Chainway Labs is seeking a Senior Protocol Engineer to join our team at Citrea, Bitcoin’s First ZK Rollup. At Citrea, our goal is to secure on-chain finance with Bitcoin. We believe that Bitcoin and its values should be scaled to serve as the standard for decentralized finance. Achieving this vision requires scaling Bitcoin with zero-knowledge proofs, ensuring on-chain verifiability and data availability within the Bitcoin network. This approach makes Citrea the first scaling solution to enable more complex applications without compromising Bitcoin security and changing its consensus rules.

Job Responsibility

  • Design, develop, and maintain cryptographic protocols for Citrea’s rollup and bridge architecture
  • Collaborate with engineering and product teams to ensure seamless protocol integration
  • Build and optimize core bridge components such as state proof generation, verifier binaries, and signature collection
  • Ensure scalability, security, and performance across the bridge and rollup infrastructure
  • Lead testing efforts to validate protocol correctness and bridge reliability

Requirements

  • A minimum of 5 years of hands-on experience in protocol development
  • Proficiency in Rust
  • Exceptional communication skills in English, both written and spoken
  • An aptitude for quick thinking, problem-solving, and clearly and effectively expressing solutions
  • 'That Guy' or 'That Gal' Mindset: We value individuals who exhibit a proactive approach to tasks and challenges, fearlessly conquering any obstacles in their path

Nice to have

  • Knowledge of Bitcoin, Lightning Network, and Ethereum rollups, particularly ZK rollups
  • Understanding of Blockchain and layer 2 architectures
  • Previous start-up experience or demonstrated entrepreneurial spirit

What we offer

  • Competitive compensation package, including equity options
  • Remote work setting
  • Engaging community activities that foster team bonding and collaboration
  • A welcoming atmosphere where every team member's opinion is valued
  • A dynamic team environment filled with bright, young, and dedicated colleagues, offering an enriching collaborative experience
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