Walmart chief technology officer Jeremy King is set to leave the business at the end of the month, according to an internal memo.

King is set to depart on March 29 and his full-time replacement has yet to be found, according to the memo seen by Reuters.

In the message, King’s tenure at Walmart was praised by US chief executive Greg Foran and ecommerce chief Marc Lore.

It said: “The operations decisions made during [King’s] time were key to the success of our technology team and led to more agile ways of working.”

King joined the company in 2011 and has revamped the American grocery giant’s ecommerce technology platform and overseen the transformation of 4,700 stores.

He also led the company’s technology arm Walmart Labs and was central to its push to compete digitally with Amazon in the USA.

King has been central to the world’s largest retailer’s pivot from purely bricks-and-mortar retail towards becoming a genuinely multichannel business. It is now the third-largest IT spender in the world.

Senior vice president of customer technology at Walmart Labs, Fiona Tan, will reportedly take on some of King’s role while his long-term replacement is being found.

Reuters said “it was not immediately clear” what King would do next once he has left the retailer.