Card Kingdom
Software Engineer III
Card Kingdom buys and sells Magic: The Gathering cards online and is one of North America's largest MTG retailers. I spent five years on the engineering team working across the full stack on e-commerce, administration, fraud prevention, and infrastructure.
I implemented the fraud detection solution that cut credit card losses by more than $100,000 per year, brought the legacy payment codebase into PCI compliance ahead of an audit, and refactored monolithic admin and e-commerce apps into containerizable services. I also redesigned the admin UX around specific job roles, shipped customer-facing e-commerce features, and reduced infrastructure costs through tooling and resource optimization. High-volume e-commerce with real uptime expectations.
Key Achievements
- Implemented fraud detection that eliminated $100,000+ in annual credit card losses
- Brought the legacy payment codebase into PCI compliance
- Monitored system reliability with Splunk: log management, dashboards, alerting
- Refactored monolithic apps into containerizable services for cloud deployment
- Redesigned admin tooling around specific job roles; shipped several customer-facing features