Slack, the San Francisco firm behind the fastest-growing business app of all-time, aims to employ 180 people in its European headquarters in Dublin by the end of the year, filling its brand new base to capacity.

The company opened its first office outside North America in Dublin's Digital Hub as recently as 2015 and has just cut the ribbon on its new European headquarters in One Park Place.

Founder and chief executive Stewart Butterfield told the Irish Independent that its love affair with the capital is only growing.

"Dublin is ahead," he said, when comparing it to other major European cities. "It's part of Europe, has a good ecosystem and has good people to hire. And when we hire them, they often have connections to people we can steal."

Butterfield said that the decision was looking even better post-Brexit vote.

While saying that it was "a little bit sad to see" the UK deciding to leave the EU, he noted at the Dublin office opening that it had made him "doubly happy" that Slack chose the Irish capital over London.

Despite this, a London-based sales office will be coming down the line. Extending its European influence, Slack is also looking at building a data centre in Germany at some point "because that's where it seems a lot of the policy is made". 

The workplace messaging service is primed to launch in French, German and Spanish, as well as Japanese, so it anticipates its number of European users to significantly increase.

It currently gets roughly four million daily users, with over a million users paying to use the platform. Some 42% of the company's revenue now comes from outside North America.

Slack also took the opportunity to announce that Johann Butting has been hired as its head of sales for Europe, the Middle East and Africa. He had previously worked as the head of sales for Dropbox, located a floor above Slack in the Hatch Street office building in Dublin 2.