Gdansk, Poland. For the next six months, the weather will be great (warm/hot, but practically never exceeds 26-28 C) and days will be long. Good public transport. You can live close to the beach. Good amount of IT around, and educated people who do speak English. Internet is not a problem (300 MBit/s at $20 a month). Charming nature/lakes/villages for hundreds of miles outside the city (the Kaszuby region). At $1500 a month, you’ll be living very comfortably.

The November-March part of the year is a bit dreary, but April-October is glorious for the most part. Just the right kinds of temperatures, and sun. If you’re from Europe, I’d say it’s probably better here (and in places in Europe with similar climate) than in SEA during spring and summer.

I’d recommend a few other Polish cities as well, but they’re not on the coast and so they can get hotter in the summer.