Hiring: Principal Security Engineer Company: Block Location: New York, NY Job Posted Time: 2026-09-02 18:04:32 Target Skills & Keywords : Clean Architecture About the job Experience: •10+ years of experience developing and shipping production software and critical services, with a minimum of 5 years focused on establishing and scaling security practices in a large, modern technology environment. Required Skills: •As a Principal Security Engineer focused on Software Security Engineering at Block, you will be a technical leader reporting to the CISO responsible for setting the bar for security excellence and driving the creation of innovative, world-class software solutions to complex security problems. You will work across Engineering and Information Security (InfoSec) to champion a "Secure by Design" culture, directly influencing the architecture of Block's core products and infrastructure. Your mandate is to provide deep technical expertise and strategic direction to ensure that security is enabling fast, secure innovation across the business. •Software Security Innovation •: Deliver world-class and innovative software solutions to security problems, tackling Block's top risks such as technology fragmentation and security after-the-fact. •Technical Strategy & Architecture •: Define the multi-year technical strategy for software security at Block, guiding architectural decisions and ensuring alignment with engineering best practices. •Cross-Cutting Solution Leadership •: Identify and lead the development and implementation of common, high-leverage security solutions and infrastructure across Block's business units (Square, Cash App, TBD, etc.) to combat data sprawl and overpermissioning. •Drive engineering excellence •, specifically around security, for critical systems like tokenization platforms, ensuring integrity, performance, and scalability. •Spearhead the security strategy •and engineering excellence for mobile software and platforms across Block's product ecosystem. •Champion security reliability engineering •(SecRelEng) practices to improve the overall resilience and availability of security services and infrastructure. •Execution Excellence •: Lead technical planning and implementation for high-priority security initiatives, acting as a technical decision maker/tie-breaker and upholding high technical standards. Qualifications: •Track record of exemplary technical leadership and decision-making at a Principal or equivalent level (L8+ technical capabilities preferred). •10+ years of experience developing and shipping production software and critical services, with a minimum of 5 years focused on establishing and scaling security practices in a large, modern technology environment. •Mastery of system design and architecture, with demonstrable experience solving ambiguous, domain-heavy problems by str Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!