Another good library for this is Graphile Worker. Uses both listen notify and advisory locks so it is using all the right features. And you can enqueue a job f

Another good library for this is Graphile Worker. Uses both listen notify and advisory locks so it is using all the right features. And you can enqueue a job from sql and plpgsql triggers. Nice! Worker is in Node js. https://github.com/graphile/worker https://github.com/graphile/worker