In a major overhaul of its human resources (HR) function, the E-commerce giant, Flipkart is likely to appoint former Tata Communications finance chief Sanjay Baweja as its new chief financial officer (CFO), sources said. Tata Communications Thursday confirmed that Baweja was leaving the company to pursue another opportunity. Flipkart's previous CFO, Karandeep Singh, had left the company early last year.