Irish software firm Datalex has reported a 55% rise in profit after tax on the back of strong growth in the company's revenue.

The company made a profit of $4.2m last year, while its revenue rose by 13% to $46.6m. 

Datalex develops software for international travel companies to help them improve the amount they can earn from customers.

Its clients include Aer Lingus, Virgin Atlantic, JetBlue and Air China.

Datalex shares closed up 2.96% in Dublin trade today.

Aidan Brogan, the company's chief executive of  Datalex, said that 2015 was another year of strong performance for Datalex. 

"We continued to deliver double digit growth in our revenues, adjusted EBITDA and cash and short term investments, while undertaking significant investment in key scaling capabilities, including our product and our people," he added.

The company said it was recommending a dividend of four cents per share, up 33% on the 2014 dividend.

During the year it said it added a number of new airlines live to its platform, including JetBlue Airways, Beibu Gulf Air - a member of the Hainan Group of airlines - Abacus Travel Systems of Singapore and Edelweiss Air, a member of the Lufthansa Group airline.

Datalax said the full year impact of these carriers, as well as the go-live of its fourth Chinese carrier in March of this year and Swiss International Airlines in the middle of 2016 will help drive its growth in platform revenue and earnings this year and beyond.

Looking ahead, the company said that growth this year will be driven by three strands - customers due to go live during 2016, the full year impact in 2016 of customers that went live during 2015, and organic growth at existing customers.

Datalex said it was confident that this will again deliver adjusted EBITDA growth of 20-25% this year.

"We see an ever-increasing market opportunity for Datalex, as growing numbers of large airlines acknowledge that the digital commerce system is now the primary channel for customer engagement. As a result we expect to maintain this adjusted EBITDA growth trajectory over the medium term," it added.