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UID:pretalx-scbcn2026-M8XKK3@c4p.softwarecrafters.barcelona
DTSTART;TZID=CET:20261017T160000
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DESCRIPTION:Exactly-once semantics is a cornerstone - and often unspoken - 
 rule of many business requirements: we must not charge a user twice for th
 e same product\, deliver the same service twice\, or lose a payment halfwa
 y through.\n\nBut the distributed systems we build on rarely provide exact
 ly-once behavior end to end. As business rules grow more complex and archi
 tectures span services\, queues\, databases\, and third-party APIs\, getti
 ng this right becomes a really hard engineering problem.\n\nIn this talk\,
  we’ll walk through a real fintech case from the initial product promise
  to the technical architecture behind it. We’ll bridge the gap between b
 usiness expectations and the guarantees engineers must build\, examine the
  most important failure modes\, and arrive at a solution that delivers eff
 ectively-once behavior in practice.
DTSTAMP:20260727T075639Z
LOCATION:Track 2
SUMMARY:Exactly-Once Semantics: Getting It Right When Money Is on the Line 
 - Sergei Aleksandrov
URL:https://c4p.softwarecrafters.barcelona/scbcn2026/talk/M8XKK3/
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