Singapore may not be the best locale for Functional Specification job offers. Right now, Jobspotting counts only 2. Maybe, you could try slightly farther afield. Frontend Development or HTML5 jobs are overarching themes worth a look, as these are the main categories the job offers can be broken down to. Topics like Business Requirements, Requirement analysis, and Requirements Management come up a lot in job offers in this area.
While it can sometimes be difficult to find a junior position, that's not right now the case. On Jobspotting, 50% of advertised job opportunities don't require many years of experience. If you have your heart set on a specific type of internship, why not sign up to Jobspotting? We'll let you know as soon as one comes available. Bear in mind that 100% of employers seeking aspiring pros with Functional Specification skills are right now startups. Why not have a look at job opportunities in another country to compare and contrast opportunities. Just use the Explore tab.