The Payments Engineer Playbook

The Payments Engineer Playbook

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Why Don't You Use Generics in Ledgers?
It's not you; it's that DRY and KISS are misguided.
 • Alvaro Duran
Money as Metadata
What happens when we ignore the belief that all money is interchangeable?
 • Alvaro Duran
From Stock Markets To Ledgers, Part III: Time
I find Feynman’s quote that “nobody understands quantum mechanics” a bit silly.
 • Alvaro Duran
Raft Consensus in 2,000 words
Understanding the Understandable Consensus Protocol
 • Alvaro Duran
From Stock Markets to Ledgers, Part II: Fault-tolerance
Paxos is Not-Invented-Here consensus. That's why Raft is succeeding.
 • Alvaro Duran
From Stock Markets To Ledgers, Part I: Fairness
Why fairness, not speed, is the ultimate validation of stock markets
 • Alvaro Duran
How To Prevent Cache Stampedes
Think cache invalidation and naming things are hard?
 • Alvaro Duran
CQRS Is Just Balances And Records
Ledgers are hard because you're forced to separate reads from writes
 • Alvaro Duran
Richard Pryor Stole a lot of Half Cents and Bought a Ferrari
Why Floats and Decimals as Money Make Illegal States Representable
 • Alvaro Duran
Caching In the Past Is a Rare Event
How domain knowledge turns caching into an easy problem
 • Alvaro Duran
If Amazon Can't Figure Out How To Make Money From Blockchain Databases, Nobody Can
Amazon is sunsetting QLDB; if you're a user, your only remaining option is to build it.
 • Alvaro Duran
A Tale of Two Ledgers
How the boundaries between the conflicting ledger modes inform the design of a ledger that could do both.
 • Alvaro Duran
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