Tiger Global-backed Hong Kong start-up SleekFlow, whose software helps retailers manage chats and orders coming from social media platforms, is targeting a valuation of up to US$300 million in its next round of financing, as it sees strong growth in an expanding social e-commerce market. SleekFlow’s revenue grew eight times last year compared to the previous year, and is on track to grow at least four times this year “even during a recession”, 27-year-old founder and CEO Henson Tsai told the Post in an interview. The company offers a platform that lets merchants integrate messages, orders and transactions coming from…