If an IT veteran comes to Singapore job market from silicon valley, he is welcome by Singapore employers, but if he comes from Wall Street, he is more valued.
Singapore positions itself more as a financial center than a technology hotbed. In many arenas, Singapore is playing catch-up with world leaders. Singapore is more successful pushing to the forefront in oil, air transportation, freight logistics (best sea port), medical services, and financial services, esp. commodities trading.
Singapore is somewhat less successful in electronics (once successful), life science, research, telecom…
A technology hotbed requires more resources — more talent, more research, more funding … than city state Singapore has.
One of the wall st experiences/know-hows needed most is real experience in trading system architecture.