Senior Security Engineer, Platform Security

Block builds simple, powerful tools that make progress towards an economy that’s truly open to all.

Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we’re helping build a financial system that is open to everyone. Join us.

The Role

The Platform Security team is responsible for securing Block's cloud, compute, and network infrastructure across multiple business units including Square, Cash, and Afterpay.

We discover, track, and enable the business to remediate the most critical security risks across Block's cloud ecosystems (AWS and GCP). We drive the creation of cloud security policy and best practices, measure and aggregate deviations from these policies, and develop capabilities to estimate security risk based on cloud signals and business context. This work drives Block's cloud security strategy and is the lens through which Block measures progress of our cloud security posture over time.

We believe that the secure option should be the easiest option for our users. We're looking for a strong Senior Platform Security Engineer with a deep understanding of securing cloud infrastructure and services at scale to help us execute on this vision.

You Will

• Architect and evolve cloud security guardrails. Design and implement SCPs, GCP org policies, and IAM controls that shape how Block uses cloud infrastructure for years to come.
• Build automation to discover, measure, and contextualize security issues. Develop integrations with CSPM/DSPM tools and internal platforms to surface and prioritize findings.
• Own the cloud security exception lifecycle. Build and maintain the tooling and processes that allow teams to request, review, and track security exceptions at scale
• Partner with platform teams to deliver solutions that permanently eliminate entire categories of cloud security risk.
• Deliver key cloud security assurance functions. Balance the need to remediate critical misconfigurations and sensitive data exposures with being responsible stewards of our developers' time.
• Develop risk-based prioritization. Build data pipelines and dashboards that aggregate security signals and help leadership understand posture trends.
• Respond to and triage cloud security alerts. Support on-call rotations, investigate findings, and help engineers resolve issues quickly.
• Produce quality software that stands the test of time and scales across Block's multi-cloud footprint.
• Think, build and iterate in an AI-au