At AT-systems, I led data engineering and analytics for an AdTech business, with up to 15 direct reports. I built a BigQuery and PostgreSQL analytics platform and ETL/ELT pipelines serving as the shared source of truth for business metrics.
I replaced isolated manual tests with continuous automated A/B experimentation integrated into traffic allocation, optimizing for conversion, revenue, and profitability. I also trained predictive models in BigQuery ML and built custom ROI and profitability forecasts.
I reduced analytics infrastructure costs by 96%, saving about $20,000 per month without reducing analytical quality. I delivered reporting in Looker and Tableau and designed an RTB bidder architecture with a forecast cost reduction, though implementation wasn't completed before I left.
At LoveLife Co Ltd, I built a data and production-accounting system for food manufacturing and automated internal workflows. In independent projects, I built LLM features in Go, BigQuery anomaly monitoring, and a traffic-event pipeline using Cloudflare, Cloud Run, Pub/Sub, and BigQuery.
