Senior Security Engineer (Blockchain Security)
Core
Own the security posture of Nu's crypto operation by applying offensive security, building security tooling, and ensuring regulatory compliance for blockchain products.
Role type
Senior Security Engineer (Blockchain Security)
Builds
Hardened ingress/edge controls, security monitoring and anomaly alerting, secure secret-management, and automated security-review tooling for crypto products.
Domain
Financial services / Blockchain and Cryptocurrency
Deliverable
production ML models | product features | dashboards & analysis | research | client delivery | infrastructure | physical/clinical work
Required skills
Offensive security (penetration testing, vulnerability assessment, attack simulation), Security-by-design and threat modeling, Hands-on software engineering (Clojure preferred, modern languages), Blockchain and cryptocurrency fundamentals, Knowledge of attack vectors and exploits, Security frameworks (OWASP, NIST CSF), AI-assisted engineering, Cloud infrastructure (AWS), Operating systems, networks, and databases
Preferred skills
Smart contract auditing (Solidity), DeFi protocol experience, Third-party crypto custody integration, Regulatory compliance in financial contexts, Bug bounties and CTFs
Technologies
Clojure, AWS, Solidity, Fireblocks, Circle
Responsibilities
Simulate attacks and run penetration tests on crypto products; Embed security into product development lifecycle; Build and operate in-house security services and automation; Ensure crypto operation meets regulatory requirements; Collaborate on secure blockchain architecture; Contribute to security policies and standards; Use AI to enhance security engineering tasks
Seniority
Senior, hands-on IC