For Canberra technology entrepreneurs Phillip Williamson and Michelle Melbourne, it has been a more than two decade labour of love, propelled by one of the most important products you probably don't realise you use all the time.

Co-founders of software technology company Intelledox, the pair have built a roster of clients including federal departments, state and territory governments, ASX top 200 firms and large international companies, selling their unique Infiniti software.

With 15 million users worldwide, Infiniti uses data-driven technology to improve customer service and engagement.

Fresh from signing a multi-million dollar deal with one of the world's largest investment banks in New York this week, Ms Melbourne said anyone who has bought an insurance policy online, enrolled at university, negotiated a mortgage or renewed their drivers' licence has probably benefited from Infinity one way or another.

"We're a company out in Wiluna Street in Fyshwick, we're not in Bridge Street in Sydney, and we're providing world-class technology to tier-one financial services firms around the world," she said.

"You wouldn't really expect to find that kind of thing out the back of Canberra. Everything we've been doing here for years now has been leading to the moment of securing the biggest names on Wall Street."

"You don't just show up and land that deal, ahead of about 15 other competitors."

Intelledox is already established in overseas markets including New York, Dallas and London. The next step? More expansion efforts overseas.

The pair studied science at Australian National University in the late 1980s and have leveraged success in Australia and Asian markets including Singapore to crack the US.

"It really helps Australian companies to export via Asia. It's a great first step on the world stage, it's closer, it's a more friendly time zone and potentially easier to support for technology products," Ms Melbourne said.

"It hasn't been such a step for us to go to the US after cutting our teeth in Asia."

The deal will see Intelledox double its staff of nine in the US in coming months, and Ms Melbourne said she expects it will lead to bigger deals in future.

"We have a razor-sharp focus on North American growth in the financial services sector.

"The homework we have done in Canberra in the past five to 10 years has given us the grit and the courage to be successful in the US, and that's seen a lot of clients taking a punt on a start-up software company, which has made us really strong through collaboration that would only happen in Canberra," she said.