Amazon’s Omnichannel Metrics (OCM) team in Toronto, Canada seeks an SDE II to own end‑to‑end architecture for large‑scale data pipelines, working across Spark/EMR, AWS, and data modeling. You’ll mentor engineers, drive design reviews, and partner with scientists to productionize ML models for advertiser measurement. The role emphasizes ambiguity, rapid delivery, and impact on real-time insights for hundreds of advertiser studies, with a path to shape OCM’s next generation platform.