Visa eSolutions
While working at PCCL. eSolutions is a comprehensive management information system designed to enable Visa Purchasing Card users to manage all their card transactions more efficiently and cost-effectively. Back-end was started in Rails 0.9 and upgraded over time to the latest Rails versions. Development primarily in Ruby and Javascript. Supporting services, including a distributed background job runner and PCI-DSS compliant infrastructure were also built. Pioneered several now common-place methods of deploying "enterprise" Rails applications, including supporting multi-tenancy database connections.