QTimBackend

QTimBackend is a backend component designed to provide time-based task scheduling and queueing for applications that use the QTim framework. It offers reliable execution of delayed tasks, periodic jobs, and time-based routing, separating scheduling logic from application code to enable scalable, event-driven architectures.

Its architecture is modular, consisting of a scheduler service, a distributed task queue, a storage layer, and an API gateway. It supports pluggable storage backends (SQL and NoSQL) and a pluggable messaging layer. A distributed locking mechanism ensures safe concurrency, and replication or sharding options support high availability. The system exposes REST and gRPC interfaces and provides a lightweight software development kit for integration.

Key features include cron-like scheduling, time zone handling, recurring jobs, durable queues, and configurable retry policies with backoff. It supports dead-letter queues, metrics collection, health checks, and audit logs. The platform is extensible through plugins for authentication, storage, and notification channels (email, Slack, webhooks).

QTimBackend is designed to integrate with the QTim ecosystem but can be used as a standalone service via its standard APIs. It works with common container orchestration environments and includes CLI tools for management and maintenance tasks.

Development and governance are community-driven, with an open-source license and regular releases that improve scheduling precision, scalability, and operator experience. The project provides documentation, API references, and usage examples to help teams adopt and extend the backend.