Secure a multi-cloud data platform remotely from Canada, focusing on tenant isolation, compute boundaries, and high-throughput customer APIs.

In this Lead application security role, you will become the first dedicated security engineer and define priorities across a growing engineering organization. Your work spans AWS, Azure, and GCP, including customer-owned cloud accounts and current regional launches. You will balance security, cost, performance, and data residency.

Key Responsibilities:
Design and refine compute isolation frameworks
Secure multi-region and multi-cloud backend launches
Strengthen access control granularity on public APIs
Detect abuse without blocking legitimate customers




Find and solve highest-leverage architecture problems

Requirements:
Production experience with APIs, distributed systems, or pipelines
Six or more years in security engineering
Experience as one of the first security hires
Multi-cloud or multi-region platform security experience
Ability to explain designs clearly under technical questioning

Bring backend depth and security leadership to cloud boundaries, compute isolation, API protection, and enterprise data residency requirements.
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📌 Lead Cloud Security Engineer Toronto (Canada)
🏢 The French Sourcer
📍 Canada