About ZetaChain

We're building something ambitious at ZetaChain: the first universal blockchain that connects everything—Bitcoin, Ethereum, every chain. We're backed by top investors, live on mainnet, and building the future of blockchain technology. If you're excited about working on big, meaningful problems with a world-class team, you're in the right place.

We are seeking a Senior Site Reliability Engineer to join our team to help streamline operations and maintain critical infrastructure. You’ll write custom code to automate operational tasks and support a fleet of nodes for multiple blockchain networks. You’ll also provide guidance and expertise to development teams to ensure their applications follow modern best practices. Your work will directly impact the health and stability of our L1.

Why You Want To Work Here

• Impactful Role: Play a pivotal role in shaping the future of a leading blockchain protocol.
• Remote Flexibility: Enjoy the freedom and flexibility of a remote work environment, ensuring a work-life balance with quarterly team meet ups to get to know each other in person.
• Cutting-Edge Technology: Dive deep into the latest advancements in blockchain technology with ZetaChain's innovative protocol.
• Continuous Learning: Stay updated with the rapidly evolving blockchain landscape, ensuring you're always at the forefront of the industry.
• Commitment to Open Source: We are committed to supporting open source software and use high quality open source tools internally when possible.

Find out more about our hiring culture: Culture Of Excellence

Job Description

We are seeking an experienced and dedicated Senior Blockchain Security Engineer to join our Security team and play a crucial role in safeguarding the ZetaChain ecosystem.

This role is focused on securing the broader ZetaChain ecosystem by working hands-on with independent third-party developer teams — from early-stage grant recipients to established partners — to help them build and maintain secure blockchain applications. These teams are critical to our ecosystem’s growth.

The ideal candidate has a strong background in product security, software engineering, and blockchain technology, along with the ability to operate as both a technical expert and a trusted partner to external teams.

Responsibilities

• Work directly with external ecosystem developers to advise on security best practices and help ensure their applications are secure throughout the development lifecycle
• Collaborate with both internal and external development teams to identify high-risk code changes and participate in security-focused code reviews
• Develop and implement innovative security testing methodologies specific to blockchain and DeFi environments
• Analyze new and emerging attack vectors in the Web3 space and assess their potential impact on ZetaChain
• Lead or coordinate security audits and penetration tests for ecosystem projects, and drive timely remediation of findings
• Contribute to and help manage the bug bounty programs by validating and triaging reported vulnerabilities
• Create and maintain security guidelines, best practices, and documentation tailored for ecosystem developers

Requirements

• Location:
  • Hybrid in San Francisco is preferred (2-3 days a week)
  • Open to fully remote for exceptional candidates that align with US Timezones
• 3+ years of experience in cybersecurity, with a focus on blockchain and Web3 technologies
• 2+ years of software development experience working with smart contracts (Ideally Solidity)
• Strong understanding of blockchain fundamentals, smart contract vulnerabilities, and DeFi-specific security risks
• Experience with security tools and techniques specific to blockchain environments
• Deep familiarity with common attack vectors in Web3, such as flash loan attacks, reentrancy, and oracle manipulation
• Strong analytical and problem-solving skills with attention to detail
• Excellent communication skills and ability to explain complex security concepts to both technical and non-technical audiences

Preferred Qualifications

• Experience with Ethereum, Ton, Solana, SUI, and other major blockchain protocols
• Previous experience auditing smart contract code (Solidity, Rust, Func, etc)
• Contributions to open-source blockchain security tools or research
• Active participation in bug bounty programs or capture-the-flag (CTF) competitions
• Experience implementing and managing automated security testi