Senior Security Engineer, DeFi

As a Senior Security Engineer, DeFi, you will protect decentralized finance systems and strengthen security across a rapidly evolving blockchain environment. You bring senior-level security expertise to the design, development, and operation of DeFi products and infrastructure. You'll collaborate with engineering and security teams to identify vulnerabilities, improve security practices, and build resilient systems. This remote role offers significant autonomy and the opportunity to work on complex security challenges where technical rigor, proactive risk management, and deep understanding of decentralized systems are essential.

What you'll do

• Design, implement, and continuously improve security measures for decentralized finance applications, protocols, and supporting infrastructure.
• Identify, assess, and mitigate security risks across DeFi systems, smart contract environments, blockchain infrastructure, and related technologies.
• Conduct security reviews, threat modeling, vulnerability assessments, and other technical analyses to identify potential attack vectors and weaknesses.
• Partner closely with engineering teams to integrate security principles throughout the software and product development lifecycle.
• Investigate security incidents and vulnerabilities, supporting remediation efforts and helping strengthen defensive capabilities.
• Develop and improve security processes, tooling, monitoring, and controls to increase the resilience of DeFi systems.
• Contribute technical expertise to security architecture and design decisions for new and existing systems.
• Stay current with emerging blockchain, DeFi, smart contract, and application security threats and translate relevant developments into practical security improvements.
• Collaborate across technical teams to promote secure engineering practices and a strong security culture.

What you bring

• Senior-level experience in security engineering, application security, blockchain security, or a closely related discipline.
• A strong understanding of decentralized finance, blockchain technologies, smart contracts, and associated security risks.
• Demonstrated experience identifying and mitigating vulnerabilities in complex technical systems.
• Strong knowledge of security architecture, threat modeling, vulnerability assessment, secure software development, and security best practices.
• Experience working closely with software engineers and other technical stakeholders on security-focused initiatives.
• The ability to analyze complex systems, identify potential attack paths, and develop practical mitigation strategies.
• Strong programming and technical problem-solving capabilities, with the ability to understand and review complex codebases.
• Excellent written and verbal communication skills, with the ability to explain security risks and recommendations clearly to technical and non-technical stakeholders.
• A high degree of autonomy, ownership, curiosity, and attention to detail.
• Comfort working in a fast-moving environment where technologies, threats, and priorities evolve rapidly.
• A strong interest in emerging technologies and a willingness to continuously develop expertise in blockchain and DeFi security.

What we offer

• US base salary of $165,000-$225,000, with individual compensation determined by skills, experience, education, training, and other job-related factors.
• Additional total compensation through tokens and equity, with eligibility for annual equity and token refresh grants.
• Comprehensive medical, dental, and vision insurance for employees and dependents, plus Health Savings Accounts and Flexible Spending Accounts.
• 18 weeks of paid parental leave.
• Wellbeing programs, including family planning support, gender-affirming care, fitness and nutrition resources, mental health support, counseling, and an Employee Assistance Program.
• Short- and long-term disability, life insurance, accident insurance, and other coverage options.
• Traveler insurance and 401(k).
• Complimentary privacy protection service and wellness stipend.
• Flexible paid time off and 11 paid holidays annually.
• Remote work environment with opportunities for team offsites and an annual company retreat.