Discussion
Migrating the Payments Network Twice with Zero Downtime
themafia: This is cool, but a part of me has to be flip, and humanity is kind of hilarious to me. All of this amazing infrastructure and hard work to essentially just very carefully and accurately subtract one number from another in a way that makes auditing easy.
e-dant: A fascinating en dash, used as an em dash, followed by two em dashes.Hmmm.
alberth: Re: transition to micro services (from monolith).I’m surprised a network so sensitive to latency (as are payment networks), was able to achieve their latency SLAs with micro services.Maybe Amex being a closed-loop network helps with latency?
mitchellh: Cmd+F "Kubernetes".Oh Jesus Christ.
mattclarkdotnet: Since when were payment networks latency sensitive? It’s usually 2 or more seconds to even get a payment up on the card terminal from the merchant POST system, then 2-5 seconds more from card presentation to getting approval back.
mikepurvis: "Rebuilding the full payments network from scratch was a significant, multi-year effort. It involves complex processing logic, extensive edge cases, and exception handling."Quite apart from fraud/abuse prevention, I expect part of this is stuff like juggling all the different rewards and points systems plus handling time-based offers ("spend $x at y retailer by z date, get $10 cash back" type thing) plus ensuring that all those things are correctly unwound in the case of refunds being issued.As someone who recently got an Amex card (primarily for Air Canada lounge access), I've been impressed at how nice their app is compared to the five previous bank apps I've been exposed to in recent years (Scotia, BMO, RBC, Tangerine, CIBC). Some nice things I noticed that I haven't previously experienced:- instant alerts on use, even when it was a non mobile pay transaction- up to the minute transaction history in-app, including Aeroplan point accrual; all my other credit cards have a delay before new items appear.- an in-app button to debit my bank for the balance without me having to go to my bank's app to send a bill pay.
3x35r22m4u: Norton Antivirus for Android doesn't allow me to access the site. Hmm.
alberth: I’m fairly certain that’s a POS issue, not the payment network.I’ve heard anecdotally that it’s < 140 ms for payment networks.Anyone, please correct me if you know better.
quesera: Apple Card has the same features, currently issued and operated by Goldman Sachs but will be transferred to Chase within the next two years. Hopefully the features and functionality will survive. I don't think Chase has them today, so I wonder.It's atrocious how bad most bank and card apps are. I'm looking for a new bank, and mobile app quality is a huge criterion. Bank of America and Wells Fargo get zero points from me.
