[shibby]

The best places to look are on Meetup and Eventbrite, there are groups that meet fairly regularly for most languages/technologies. Such as Leeds Ruby Thing - https://twitter.com/leedsrubything , Leeds DevOps -http://www.leedsdevops.org.uk, Leeds JS - http://www.meetup.com/LeedsJS, and there are many others, even one dedicated to AWS I think.

Sky have recently started big investment in the area, as you're probably aware, and do a Tech Event most months with various guest speakers, the next one of those is focusing on JS if that's your thing - https://www.eventbrite.co.uk/e/leedstechhub-javascript-ticke...

There's a Code Dojo - http://www.meetup.com/Leeds-Code-Dojo

There is also a Hack Space if that interests you - https://leedshackspace.org.uk

An annual Hack Day takes place, but that's usually later on in the year - http://leedshack.org - but other hack days have appeared at other times during the year (they tend to be corporate sponsored ones but if you get past the recruitment element of them, they can be fun.)