Airwallex co-founder Lucy Liu says the international payments giant is on track to double revenue to more than $3 billion in the next 12 months and is focused on growth before pursuing a sharemarket listing.

The payments services provider founded in Melbourne a decade ago is valued at $9.5 billion and said it had increased its annual recurring revenue to $US1 billion ($1.5 billion), up from $US500 million in last year thanks to strong growth in international markets.