India's top IT service providers are going slow on hiring as clients cut back spending and defer projects due to macroeconomic challenges, in a U-turn from the excesses of the past few years made in anticipation of further growth. Tata Consultancy Services, Infosys and HCLTech have seen employee headcount reducing in the second quarter as they reported weak results. Infosys and HCL trimmed their full-year revenue outlook.