Walmart, the US retail giant behemoth, has operated a business in Dublin since 2017, which at its peak last year employed almost 100 people. This month, however, the $400 billion valued retailer is quietly closing the office, which focuses on data science and software development. The office was originally home to Jet.com, an e-commerce platform co-founded by the Irish businessman Mike Hanrahan and the Wexford entrepreneur played an important role in the decision to locate the business in Dublin. Walmart acquired Jet.com for $3 billion in 2016, and later set up its Walmart Labs and Intelligent Retail Lab in the…