Worked Design: Consolidating Three Job Schedulers

Design: One Scheduler for All Scheduled Jobs
Author: platform Staff engineer
Status: approved
Agreed by: VP of Engineering, payments team, data team,
           director of the platform group, finance lead

Problem
  Scheduled jobs run on three schedulers owned by three teams:
  A (payments, 18,000 jobs a day), B (data, 16,000), C (platform, 8,000).
  Last quarter: 4 jobs ran twice (A and B retry after a timeout),
  2 jobs did not run (C never retries). One double run charged
  1,900 sellers twice. No team owns retry behavior across all three.

Goals
  1