Challenging the world’s biggest banks with its low-cost money-transfer service, TransferWise is rapidly expanding its geographic reach and headcount.

One of London’s rising $1bn financial technology (FinTech) stars just poached Google’s UK head of sales finance as it prepares for further international expansion.

Founded in London by Estonians Kristo Käärmann and Taavet Hinrikus (pictured),TransferWise is challenging some of the world’s biggest banks with tech that promises to save you up to 90% when sending money abroad, compared to traditional money transfers.

This morning TransferWise confirmed Google’s Matt Briers, who previously worked at Lloyds Banking Group as head of strategy for asset finance, started on Monday as its new finance director.

“Matt will help drive business growth across the 400 existing currency routes TransferWise offers, as well as facilitating expansion into new markets,” a TransferWise spokesperson told The Memo.

TransferWise now helps users send over £500m every month between 52 countries. In January it raised £38.6m in funding (valuing the group as one of London’s $1bn small digital businesses) to accelerate its global expansion and offices have since been opened up in the US, Germany and Australia.

The group is also currently in a massive hiring spree with upwards of 50 available positions on its website, including a full-time country manager for Japan.

Matt Briers move to TransferWise was first reported by Business Insider.