Series A Fintech companies in London

Companies modernising banking, payments, lending, and financial infrastructure. Filtered to Series A-stage companies headquartered in London.

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Built from a search like: “Top Series A Fintech companies in London”

Ranked by current headcount across Series A Fintech companies in London. Refreshed monthly.

1
Paymentology· London, England, United Kingdom
Paymentology is a global issuer processor that enables fintechs, digital banks and retail banks to launch, manage and scale card programmes around the world. Built on Lume, the platform for growth, Paymentology processes billions of transactions for clients globally, across 65+ countries and 14 time zones. With a deep understanding of local markets and the scale of a truly global operating footprint, Paymentology combines regional expertise with the flexibility clients need to build momentum, enter new markets and unlock unstoppable growth.Protect yourself against recruitment fraud. Here are the FAQs to assist in how to navigate such: https://www.linkedin.com/redir/suspicious-page?url=https%3A%2F%2Fwww%2epaymentology%2ecom%2Fen%2Fabout-us%2Fcareers
- Series A
- 411 employees
- Founded 2015
2
R3· London, England, United Kingdom
R3 is a leading provider of RWAs and digital asset on Solana. For more information, visit www.r3.com.
- Series A
- 329 employees
- Founded 2015
3
BCB Group· London, England, United Kingdom
BCB Group is a leading provider of regulated payments infrastructure for global businesses, delivering payment accounts, FX and trading, digital asset services and 24/7/365 instant settlement through its proprietary network, BLINC. Serving institutional clients worldwide — from payments businesses and fintechs to exchanges, funds and financial institutions — BCB Group is authorised and regulated in the UK, France and Switzerland.Our mission is to deliver trusted infrastructure for global payments. Our vision is to advance money movement.Regulated. Reliable. Real-time.Important Notice: We will never contact you about job opportunities through unofficial LinkedIn profiles or personal accounts. All legitimate recruitment activity comes only from our verified BCB Group company page and official @bcbgroup.io email addresses. If you've been approached by anyone claiming to represent BCB Group outside of these channels, please disregard the message and report the profile to LinkedIn.
- Series A
- 221 employees
- Founded 2017
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4
Mojo Mortgages· London, England, United Kingdom
Mojo is the UK's fastest-growing digital mortgage broker of scale.We use cutting-edge tech and expert in-house advisers to make getting a mortgage feel less like the 1980s and more like the 21st Century.That means no taking time off work for appointments in a stuffy broker’s office, no waiting on hold for updates on your application, no piles of paperwork and, most importantly, no fees.At Mojo Mortgages we can compare thousands of deals from across the entire market giving you a personalised mortgage recommendation and a Mortgage in Principle in 15 minutes. What’s more, we’ll handle your entire application for you – making all the necessary phone calls and arrangements for you until your mortgage is in place.Whether they write code or help customers, everyone in our fast-growing team is united by a belief that getting a mortgage doesn’t have to be a headache.For mortgage advice without fees and an application process without fuss, visit us at mojomortgages.comWe are part of RVU - a group of online brands with a mission to empower people and transform industries. For more information, please visit: https://www.rvu.co.uk/
- Series A
- 208 employees
- Founded 2016
5
Deblock· London, England, United Kingdom
The first crypto wallet integrated with a current account.
- Series A
- 162 employees
- Founded 2022

6
Blink Payment· London, England, United Kingdom
Blink Payment is an all-in-one payment platform that helps UK businesses get paid faster, reduce admin, and reconcile with ease, whether it's online, in person, or over the phone, all from one dashboard.We serve SMEs across industries with complex payment needs – including, but not limited to, property management, solicitors, builders and timber merchants, storage and removals, tool and plant hire, and waste management – where getting paid on time genuinely matters.Beyond direct merchants, we partner with software providers to embed our payment infrastructure directly into their platforms. Through our API, software businesses can offer their customers a seamless, fully integrated payment experience, without building it from scratch.Our platform supports cards, open banking, digital wallets, and Direct Debit payments, paylinks, virtual terminals, batch payments, and repeat payments, with integrations into Xero, QuickBooks, and Sage.Trusted by thousands of UK businesses. UK-based support that answers in 6 seconds on average.For merchants: blinkpayment.co.uk/for-merchantsFor referral partners: https://www.blinkpayment.co.uk/referral-partnersFor integration partners: blinkpayment.co.uk/integrations-partners
- Series A
- 134 employees
- Founded 2012
7
Novatus· London, England, United Kingdom
We enable financial services firms to meet their most complex regulatory requirements through specialist technology and expert-led advisory services.
- Series A
- 131 employees
- Founded 2019
8
wamo· London, England, United Kingdom
wamo is a European fintech company focused on making banking, finance, accounts and admin faster, simpler and more human for small businesses.Licensed and regulated by the Finnish Financial Supervisory Authority as a pan-European electronic money institution, wamo delivers the speed and simplicity entrepreneurs demand from a digital bank, plus personalised insight and hands-on human support to make life a little easier when things get complicated.Founded in 2021, wamo has headquarters in Helsinki and London.
- Series A
- 128 employees
- Founded 2021
9
Titanbay· London, England, United Kingdom
Titanbay is the only firm that structures, launches, runs, and trades private markets funds in one place, on purpose-built technology that didn't exist until they built it.Asset managers use Titanbay to bring private markets funds to market and run them at scale. Wealth managers access those funds and trade them through the systems they already have. Titanbay's tech and regulatory infrastructure connects both sides, automating the operational complexity that traditionally fragments the industry.
- Series A
- 110 employees
- Founded 2019
10
S64· Greater London, England, United Kingdom
S64 is the preeminent alternatives fintech and solutions partner to the wealth management industry across EMEA and APAC.We enable private banks, wealth managers and intermediaries to deliver private markets with institutional grade robustness and repeatability. We also enable private markets managers to scale private wealth distribution across these regions through best-in-class structuring, lifecycle execution and enterprise technology. A significant proportion of what we deliver is white labelled and sits behind the brands, systems and processes of our partners. S64 is a privileged strategic partner to many of the world’s leading banks, GPs and financial institutions. Many of these institutions could build similar capabilities in house. They choose S64 for speed to market, execution certainty and repeatable scale in complex, multi-jurisdictional programmes.
- Series A
- 109 employees
- Founded 2021

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Find engineers at Series A Fintech companies in London

Searching for “engineers at top Series A Fintech companies in London” surfaces this slice of the market. The list above ranks Fintech companies headquartered in London whose latest disclosed round is Series A, by current headcount, drawn from public LinkedIn and Crunchbase records. With 84 matching companies in Refolk’s index, this is a tight read on where the Fintech talent in London is heating up.

Three filters at once narrows the field hard. The companies that survive all three - Series A, Fintech, in London - are usually the most targeted recruiting pool a hiring manager can ask for. Senior engineers, founding designers, and product leads here are about to become Fintech’s next operators and angel investors.

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Refolk pulled Fintech companies headquartered in London whose latest disclosed funding round is Series A from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 3 employees. The list refreshes monthly.

Last refreshed: Fri, 18 Sep 2026 05:52:55 GMT

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