Go-Jek, Indonesia’s first billion-dollar startup, is looking to expand its ride-hailing services to three to four countries in Southeast Asia, escalating its rivalry with Grab and Uber Technologies.Co-founder and Chief Executive Officer Nadiem Makarim didn’t specify the countries or services that Go-Jek will target, but said in an interview they will be places with a large population and where cash rules, hinting that Go-Jek’s digital payment service will be a key part of its push into new ma