Tauseef Ahmed

Software Development Engineer 2 @Amazon

Vancouver, BC, CA

Spearheaded the launch of a HIPAA-compliant Amazon Pharmacy payment workflow handling TPS - prevented PHI exposure via an SQS-triggered ECS Fargate service. Led a 3-engineer team to deliver this solution, standardized as a Payments-wide pattern for simplicity, scalability and multi-queue support.* Drove a +100% YoY lift in wallet updates, adding 44M additional card updates annually and scaling to 110M+ issuer events processed per year, by building SQS-buffered, rate-limited consumers to handle burst traffic with DLQ for retries, and AWS AppConfig for configuration management.* Architected the Auto-Apply payment workflow for Health Benefit Accounts (HBA) on Amazon Checkout page TPS), employing a federated, plugin-based architecture to decouple service integrations. This approach solved critical discoverability challenges, driving a 60% increase in HBA card adoption.* Expanded payment processor response‑code handling with per‑code Weblab rollout controls and regional contact‑rate monitoring - delivering ~40% higher account updates (33M+ additional credit‑card updates/year).* Automated cleanup for a large-scale payments data store by building a cron-scheduled job that deletes 1M+ rows daily from AWS Aurora DB restoring low-latency queries, preventing scale-driven outages and eliminating ~8 hours/week of manual ops.