Expiry Logic & Dynamic QR Codes

I already run my loyalty programme on Favecard and it works well, but I now need two specific upgrades. First, every new card must automatically expire exactly 10 weeks after it is issued. I do not need... (Budget: £10 - £20 GBP, Jobs: Agile Development, API Development, Application Performance Monitoring, Backend Development, Cloud Computing, Database Management, Software Development, Web Development)