AWS, Azure and maybe Salesforce
if you can master any of these three, there will be plenty of jobs worldwide and Singapore. With the recent covid 19, both AWS and Azure and quickly expanding their rack space in DC to cater for the increase in data for people WFH. Microsoft Teams, Skype for Business do not just happen, there are cloud integration to do to get company moving. Imagine, a simple Windows 10 Implementation through the cloud, is a mammoth task already.
Salesforce integration from front end to back end, is also a mammoth task. Some companies swear by it and some company staff hated it. Like it or not, there is no other CRM as popular like Salesforce.