Workplace messaging platform Slack is to create 80 jobs in Dublin over the next two years, bringing to 180 the numbers employed in the capital by the rapidly growing company.
Last May the US firm announced it was opening its European headquarters Ireland, and would be creating 100 jobs in the process.
However, strong demand has meant the business is now planning to take on a further 80 people.
The new roles will be in customer experience and account management.
The growth coincides with the company’s move to a 29,000 square foot office space in One Park Place in Dublin city centre which can accommodate the extra staff.
Slack, which has 2.7 million active daily users and 430 employees around the world, has raised $540m in funding from some of the world’s best recognised technology investors.
It is estimated to be worth $3.8 billion, despite being just three years old.
Slack makes a messaging app which helps teams within businesses and organisations to collaborate and communicate more easily.
"Our user base grew tenfold last year and we’re seeing strong demand across all industries and from businesses of all sizes, for more efficient and effective team communications," said James Sherrett, Slack’s Dublin-based senior manager of accounts.
As well as Dublin, the company has offices in San Francisco, Vancouver and Melbourne, where it opened its Asia Pacific headquarters at the end of March.
The new investment is supported by the Department of Jobs, Enterprise and Innovation through IDA Ireland and has been welcomed by Minister for Jobs Richard Bruton and IDA boss Martin Shanahan.