BPO Collections Ltd
Sept 2025 - PresentFull Stack DeveloperContract
4→1 screen payment flow
Got a four screen payment flow down to one, and led the move off legacy ASP.NET onto a typed Next.js stack.
- Got a four screen payment flow down to one, without dropping any of the compliance steps.
- Integrated the Fiserv gateway end to end: card processing, tokenisation and digital wallets, with an HMAC-SHA256 auth layer on top.
- Built store ID routing for multi merchant transactions and wired in 3D Secure.
- Pulled Open Banking, Direct Debit and bank validation into one flow.
- Looked after a PCI-DSS SQL Server database with over 97 stored procedures while migrating the front end off ASP.NET.