Senior Security Engineer

Join Gauntlet, a leading company in the DeFi space, as a Senior Security Engineer. In this role, you will work closely with the Head of Security to build, operate, and scale our security program. You will be responsible for securing the systems that power some of the largest and most sophisticated activities in DeFi, owning security projects across product, infrastructure, and operations. You will also have the opportunity to automate repetitive security work with AI and build reusable AI components.

• Collaborate with the Head of Security to build, operate, and scale the security program, focusing on securing systems in DeFi.
• Lead security projects across product, infrastructure, and operations, designing controls, automation, and detection capabilities.
• Triage vulnerability and bug-bounty findings, drive remediation, and support incident response end to end.
• An adversarial mindset: you think like an attacker and pressure-test assumptions, including your own
• Hands-on experience applying AI and LLMs to automation and building reusable tooling or components that other engineers adopted
• Proficiency in Python, TypeScript, or JavaScript, working with Claude Code, Codex or similar AI tools
• Experience securing high-value or high-throughput transaction systems
• Experience owning security projects end to end, from vendor selection through org-wide rollout, across multiple teams
• Clear communication: you explain risk plainly and drive findings to closure
• 5+ years in hands-on security engineering spanning product or application security and security operations
• Track record of technical security assessments of software and systems, including system hardening, security policy analysis and implementing effective controls
• Crypto/blockchain security experience