What is the best job queue for background processing?

If your data is already in Postgres, consider Supabase Queues.

Supabase Queues also gives you:

• Guaranteed message delivery: Messages added to Queues are guaranteed to be delivered to your consumers.
• Exactly once message delivery: A Message is delivered exactly once to a consumer within a customizable visibility window.
• Message durability and archival: Messages are stored in Postgres and you can choose to archive them for analytical or auditing purposes.
• Granular authorization: Control client-side consumer access to Queues with API permissions and Row Level Security (RLS) policies.
• Queue management and monitoring: Create, manage, and monitor Queues and Messages in the Supabase Dashboard.

For the setup, see the Queues quickstart.