Ryan Stenhouse

Re-introducing prawn-graph - it's back! Simple graphing for PDF and Ruby

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.

Visa eSolutions

Back-end web development using Ruby on Rails. Front end development using Javascript. Various modifications over time for this client while working at Tic Toc.

Scottish Society for the Prevention of Cruelty to Animals  (SSPCA)

Designing and building a fully PCI DSS compliant technical infrastructure was a requirement of PCCL's partnership with Visa Europe. I was the technical lead and ensured we achieved the highest level of compliance possible - as a Level 1 Service Provider.

This included hardening network security of our systems, building new networks within our current building, splitting our "at risk" data and processing out into isolated systems and building new compliant interfaces to facilitate communication and compliance between these components.

This included an in-memory one-way card number scrubber and hasher, GPG-enabled file drop-boxes with in-memory encryption. Servers were enhanced with OSSEC FIM and IDS systems and other monitoring tools.

I also designed the development process for handling changes to "in scope" systems.