Claudia Bate arrived at Bell Pottinger as a partner in March from the London office of tech agency Hotwire.
Earlier this year, Bell Pottinger began working with CoInvestor, a platform for investing in non-listed stocks, on a project including brand identity and web user experience elements. It has now been given an ongoing retainer for media relations and digital marketing support.
Last month, it was given a retained brief as European agency for Ripple – a San Francisco-headquartered provider of Blockchain digital transaction support to a number of banks including Santander in the UK.
Bate said: "There is huge opportunity in this sector, and with our expertise and full-service offer, we are confident we can provide a market-leading service to both start-ups and established brands."
She pointed to 2015 data from fintech industry group Innovate Finance that showed global investment in fintech-related activity had tripled in the previous year from $4bn (£3.1bn) to $12bn (£9.2bn) across more than 730 deals, with the sector employing 135,000 people in the UK alone in 2014.
Bate told PRWeek that the agency was also close to reaching agreements to work with several other fintech clients. She also said that in developing the fintech offering she expected to work closely with the firm's Singapore office.
Of Bell Pottinger's 266 staff, 201 are UK-based, according to PRWeek's Global Agency Business Report. It is the world's 30th largest PR firm, and alongside the UK HQ, has bases in Abu Dhabi, Bahrain, Hong Kong, Kuala Lumpur and Singapore.