Background job scheduling with sidekiq-scheduler

Recurring tasks like cleanup jobs, report generation, or cache warming need reliable scheduling. The sidekiq-scheduler gem extends Sidekiq with cron-like scheduling without requiring separate infrastructure like cron or Kubernetes CronJobs. I define scheduled jobs in config/sidekiq_scheduler.yml with standard cron syntax and optional parameters. Jobs run on only one Sidekiq instance even in multi-process deployments thanks to Redis-based locking. I use scheduled jobs for daily aggregations, weekly email digests, or hourly cleanup of expired records. The key is keeping scheduled jobs idempotent since timing isn't guaranteed to be exact. For critical time-sensitive jobs, I add monitoring to alert when a scheduled job hasn't run recently.