Principal Security Engineer
Core
Technical leader setting the bar for security excellence and driving innovative software solutions to complex security problems across Block's core products and infrastructure.
Role type
Principal Security Engineer (Software Security)
Builds
Secure architecture for Block's core products, infrastructure, tokenization platforms, and mobile software across the product ecosystem.
Domain
Financial technology, payments, and cryptocurrency/bitcoin
Deliverable
production ML models | product features | infrastructure
Required skills
System design and architecture, security vulnerability analysis, high-volume real-time transaction processing, security automation scripting, technical strategy definition, cross-functional leadership, Secure SDLC integration, threat modeling, mentorship
Preferred skills
Leading technical initiatives across multiple organizational boundaries, experience in fintech/payments/crypto, building scalable security systems with sub-linear resource growth
Technologies
None explicitly listed
Responsibilities
Define multi-year technical strategy for software security, lead development of common high-leverage security solutions, drive engineering excellence for critical systems, champion security reliability engineering practices, partner with engineering leaders on security architecture reviews and threat modeling, mentor engineers on system design and technology choices
Seniority
Principal, hands-on IC with strategic direction