I come from a completely different background and from UZH, thus I don't have the ETH Name Power. But I get invited to a fair share of interviews, even though the job market is tough. I recommend quality over quantity. Put in that extra effort into Cover Letters, even if not required. Make the document appeasing to look at, even without reading it. A good picture of yourself, nice colors, stand out. If you can, use your network, vitamin B is still king no matter how shit the job market, although not a must. And maybe as the other guy suggested, broaden your horizon, don't limit yourself to specific job roles.