Walmart Inc. is committing to build four automated ecommerce warehouses to speed deliveries, hiring about 4,000 workers, and making extensive use of an automated system to facilitate processing of orders.

The new facility will allow Walmart’s total fulfillment operation to reach 95% of the US population with next or two-day shipping according to the company’s announcement Friday. Presently their system can only supply such shipping speed to 75% of the US population.

Walmart is bolstering its shipping operations in a bid to keep up with Amazon.com and other online rivals.

The new facilities were designed with technology partner Knapp to ease the workload on employees by streamlining what is presently a 12-step fulfillment process to just five steps, which will mean less walking and lifting for individual workers.

Walmart said in a statement, the new facilities will combine “people, robotics, and machine learning to set an entirely new precedent for us on the speed of fulfillment,”

The company has not revealed how much the new additions will cost. The first warehouse to open will be in Joliet Illinois, this summer. After that, over the next three years, warehouses will open in Indiana, Pennsylvania, and Texas.

Walmart says it has already begun rolling out and fine-tuning the new technology which will be used, in their existing warehouse in Pedricktown, New Jersey.