Evan Hsu

I’m a Staff Software Engineer with 10+ years of experience solving technical challenges in distributed systems, high-throughput APIs, workflow orchestration, ML productionization, mobile modernization, and secure platform delivery. I focus on improving reliability, scalability, release velocity, and AppSec posture in complex production environments.

At Amazon, I built platforms across Flex, Sustainability, Prime Now, and Advertising—leading a multi-country driver onboarding architecture with Step Functions-based orchestration and DynamoDB idempotent state tracking. I also created federated internal platform standards (IAM policies, service templates, CI/CD) to turn a 3–4 week setup into a guided 2-day workflow, and automated CI/CD security patching to reduce deployment cycles from ~3 weeks to under 2 days.

I’ve owned end-to-end delivery from inference hosting and API contracts to high-scale eligibility services (5,000–10,000 TPS) and data-quality triage across ~50 certification organizations. On mobile, I modernized Prime Now iOS from Objective-C to Swift (crash rate from ~5% to below 1%) and advanced an Ads SDK using WKWebView, MRAID 2.0, and OMID Viewability with regression coverage.