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Sarah Chen
VP Engineering
Sarah led the distributed systems team at Datadog before joining tracio.ai. She designed their metric ingestion pipeline handling 10M events/second. At tracio.ai, she architects the signal collection and processing infrastructure. She's pragmatic about technology choices — 'Use boring technology unless you have a really good reason not to' — and writes about building reliable systems at scale.
Distributed systemsSignal processing pipelinesStream architectureCross-device trackingPrivacy engineering
Articles by Sarah
Cross-Device Tracking: Linking Sessions Without Login
March 11, 20269 min read
Read article Stopping Credential Stuffing at the Edge
March 2, 20267 min read
Read article Detecting Headless Browsers: Playwright, Puppeteer, and Beyond
February 18, 20269 min read
Read article Device Tracking vs Cookie Tracking: A Technical Comparison
February 10, 20268 min read
Read article The Math Behind Fuzzy Device Matching
January 25, 202615 min read
Read article Chrome Privacy Sandbox: What It Means for Device Fingerprinting
January 5, 20268 min read
Read article Chrome Privacy Sandbox: Impact on Device Fingerprinting
January 5, 202610 min read
Read article Signal Stability Analysis: Which Signals Survive Browser Updates
December 20, 202511 min read
Read article Which Signals Survive Browser Updates? A Stability Analysis
December 20, 202511 min read
Read article Ready to get started?
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