Staff Security Engineer, Walrus at Mysten Labs

Mysten Labs believes that decentralized and open protocols are the bedrock of the internet of value. This is why at Mysten Labs, we are creating foundational infrastructure to accelerate the adoption of decentralized protocols based on blockchain technologies. The Role: We are hiring a Staff Security Engineer to act as the primary security partner for the Walrus team, providing deep architectural guidance and embedding security practices throughout the development lifecycle, starting from the design phase. What You'll Do: Lead security assessments for new Walrus features while also contributing to security initiatives across the broader Mysten ecosystem, identifying systemic risks and providing actionable remediation plans for complex architectural challenges. Drive a "security-by-design" culture, ensuring that security considerations are front-and-center before code is written, within Walrus and the wider Mysten organization. Leverage AI-driven tools and advanced automation to identify and remediate low-hanging fruit, allowing the team to focus on high-impact, complex security research. Maintain a generalist security perspective, providing strategic oversight on broader infrastructure and product security issues as they impact Walrus and beyond. Collaborate with engineering leadership to prioritize security roadmap items, balancing feature velocity with the security posture of the platform. Mentor senior and junior engineers, setting technical direction for security standards and establishing best practices across the engineering organization. What You'll Have: Minimum Qualifications Bachelor’s or Master’s degree in Computer Science, Computer Engineering, or equivalent experience. 8+ years of industry experience in security engineering, with a proven track record of operating at a Staff (E6) level or equivalent. Extensive experience as a security generalist, capable of navigating infrastructure, application, and cryptographic security domains. Strong proficiency in building, deploying, and managing automated security tooling; demonstrated history of using AI/ML or advanced static/dynamic analysis to improve security outcomes at scale. Deep expertise in collaborating with engineering teams during the design phase to proactively identify and mitigate high-risk design flaws. Excellent communication skills, with the ability to influence technical direction and lead cross-functional security initiatives. What You'll Have Preferred Qualifications Technical understanding of decentralized storage, distributed systems, or the Web3 stack (prior experience is a plus, not a requirement). Experience leading security-focused transformations or implementing security-by-design frameworks in high-growth engineering environments. Ability to balance tactical, hands-on security work with strategic long-term planning and leadership. Employment is contingent upon the successful completion of a background check, which may include verification of employment history, ed