Do you work with agencies and US or EU time zones?

Yes on both. Around a third of my work is white-label development for agencies in the US, UK, EU, and Australia: your client never sees my name unless you want them to. I work from IST (UTC+5:30), which gives a morning overlap with EU teams and an end-of-day overlap with the US; async handoffs are covered with recorded Loom walkthroughs and daily written updates. Ongoing upgrade slots and retainers can be scheduled around your release calendar.