Bitcoin Security Engineer
Core
Hands-on offensive security engineer validating and hardening Strategy's Bitcoin custody infrastructure, from cryptographic key material to custodial relationships.
Role type
Senior IC Bitcoin Security Engineer (Offensive Security)
Builds
Adversarial assessments of Bitcoin wallets, signing ceremonies, hardware security modules, and custodian security postures.
Domain
Cryptocurrency / Blockchain Security / Financial Infrastructure
Deliverable
production ML models | product features | dashboards & analysis | research | client delivery | infrastructure | physical/clinical work
Required skills
Penetration testing, Cryptographic system analysis, Hardware security testing, Bitcoin protocol testing, Threat modeling, Exploit development, Security research, Tooling automation, Key management assessment, Custody red-teaming
Preferred skills
OSCP/OSEP/CRTO certifications, Master's degree in relevant field, Experience with MPC/Multisig schemes
Technologies
Python, Rust, C/C++, Go, HSMs, Hardware wallets, Bitcoin nodes, PSBT, Side-channel analysis
Responsibilities
Execute penetration tests on Bitcoin wallet architectures and signing ceremonies; Test hardware wallets, HSMs, and secure elements for vulnerabilities; Assess blockchain-adjacent infrastructure like bridges and oracles; Conduct offensive research on custodian security claims; Develop custom fuzzers and test automation tools; Produce detailed penetration-test reports with PoC exploits.
Seniority
Senior, hands-on IC