OneCard
Senior Software Engineer
- Re-architected a core data-transformation pipeline, migrating dbt from AWS Glue to PySpark on Kubernetes (EKS), cutting the service cost by 80% and driving a ~50% reduction in overall infrastructure compute costs.
- Built a Python authentication library integrating OAuth2 and AWS Secrets Manager for unified, RBAC-compliant security across sessions and scheduled jobs.
- Shifted compute operations to Trino and rewrote Pandas logic in Polars, reducing compute costs by 40% on scaled workloads.
- Designed a SQLAlchemy query-translation layer to eliminate SQL injection vulnerabilities and syntax errors.
- Deployed a Flask/React monitoring dashboard on Kubernetes (EKS) via ArgoCD for real-time distributed cron visibility.