AIM-listed software provider Escher has been signed up by Irish coffee retail chain Insomnia Coffee to provide a fully managed mobile wallet service at its outlets. The contract, which was awarded in July and went live in 81 locations last week, "further underpins Escher's growing success in diversifying into mobile commerce solutions", the company said. Its service division has developed a range of in-store software that enables retailers to offer customer "engagement" such as interactive loyalty, coupons and Apple's iBeacon technologies and payments through a mobile wallet and other card-based programs. Shares in Escher were up 4.2% to 310p to 13:45 on Tuesday.OH