What is Conveyor?

Conveyor is a multi-backend TypeScript job queue that brings the BullMQ developer experience to any runtime and any database — without requiring Redis.

Why Conveyor?

• BullMQ is great but requires Redis as the sole backend
• Small-to-medium projects don't always have Redis in their infrastructure
• PostgreSQL is often already in the stack — why add Redis just for jobs?
• SQLite is perfect for local dev, CLI tools, and embedded apps
• No existing solution offers a unified multi-backend API with native Deno support

Key Features

Feature	Description
Scheduling	Delays, cron, human-readable intervals ("in 5 minutes", "every 2 hours")
Retry & Backoff	Fixed, exponential, or custom backoff strategies
Concurrency	Per-worker and global concurrency control
Rate Limiting	Sliding window limiter per worker
Deduplication	By payload hash or custom key with TTL
Priority	Numeric priority ordering (lower = higher)
Flows	Parent-child job dependencies with failure policies
Batching	Process multiple jobs as a single unit
Observables	Subscribe to job state changes with cancellation
Groups	Per-group concurrency, rate limiting, round-robin
Events	Real-time lifecycle events for every job state transition
Graceful Shutdown	Wait for active jobs before closing

Supported Stores

Store	Best For
Memory	Testing, prototyping, local development
PostgreSQL	Production workloads, existing PG infrastructure
SQLite	Embedded apps, CLI tools, single-server deployments

Architecture

Conveyor uses an adapter pattern — the core never depends on a concrete driver. Each store implements StoreInterface:

┌──────────────────────────────────┐
│          @conveyor/core          │
│  Queue · Worker · Job · Events   │
├──────────────────────────────────┤
│          StoreInterface          │
│  save · fetch · lock · update    │
├──────────┬───────────┬───────────┤
│  Memory  │ PostgreSQL│  SQLite   │
└──────────┴───────────┴───────────┘

Next Steps

• Getting Started — run your first queue in 2 minutes
• Installation — setup for Deno, Node.js, or Bun
• Concepts — understand the architecture