...but don't have any formal qualifications for.
The job is something like a web page troubleshooter. I'm supposed to look for and fix bugs on a company's website. (It's a sort of community site)
The only problem of course, how do I explain in my letter to them that I'm fit for the job, so that it'll catch their attention? If I just get to the interview, I'll probably be able to convince, for example by asking to demonstrate my skills live in front of their eyes. But actually getting them that interested is probably my culprit.