In 2024, the Fintech market size is expected to exceed USD 340 billion, according to Fortune Business Insights. Because of its growth, it is a perfect time to enter or strengthen your position in this profitable niche that heavily relies on cutting-edge digital solutions.  

As an experienced Fintech software development services provider, we created a list of Fintech custom software development companies that drive innovation and elevate the industry with groundbreaking software. In this list, we focus on the software development firms from the United Kingdom, however, with the power of outsourcing and leveraging dedicated development team services it would still be wise to consider them for the development processes regardless of your main business entity location.

Thanks to this article and the additional tips we provide, you can choose a custom software development agency best suited for your specific project requirements and business needs. 

UK’s Best Fintech Software Development Companies

Find out who are the most influential software development market players in London, United Kingdom, and choose the right tech vendor for your strategic collaboration! 

SPD Technology


  • Location: London, United Kingdom
  • Number of employees: 700+
  • Pricing: $25-$49/hr
  • Founded: 2006
  • Clients: Poynt, PitchBook, BlackHawk Network
  • Clutch Rating: 4.8

SPD Technology is a London-based top fintech custom software development company serving global clients for over 18 years. The company stays at the forefront of digital transformation by delivering the latest tech expertise in:

The main focus of SPD Technology is delivering disruptive innovation and accelerating client growth. The vendor leverages the latest technologies to help its clients unlock the transformative power of digital innovation and get tangible value in their projects.

SPD Technology is a global software product development company with top-skilled engineering teams distributed across the US, UK, Spain, Poland and Ukraine. We are focusing on strategic innovation development and far-reaching business goal alignment for our clients. We specialize in engineering, implementing, and supporting high-end software solutions tailored to meet diverse needs and resolve complex challenges of rapidly growing companies operating in dynamic business environments. 

During our long-lasting partnerships with our customers, we developed an extensive understanding of different business domain specifics, with a particular emphasis on the Financial, Legal, Insurance, and eCommerce technology industries.

Our experts are certified by top organizations including Oracle, Amazon Web Services, Project Management Institute, and Scrum Alliance. 

Technology:

  • Java
  • Spring
  • Python
  • GraphQL
  • SQL
  • C#
  • MySQL
  • Kafka
  • JavaScript (React, Vue.js)
  • Express.js
  • Redis
  • Scala
  • React
  • Nest.JS
  • Elastic Search
  • Kotlin

Project: Poynt

Poynt is among the Fintech business leaders with 10,000+ employees all over the world, providing innovative solutions in online and offline payments. One of those solutions is the Poynt platform, a revolutionary all-in-one commerce solution founded in 2013 and backed by prominent banking institutions, investment funds, and technology vendors that included Elavon, Google Ventures, Matrix Partners, National Australia Bank, NYCA Partners, Oak HC/FT Partners, Stanford-StartX Fund, and Webb Investment Network.

We, at SPD Technology, have a long history of working with this company, providing several dedicated development teams to cover business-critical areas. This particular partnership has been continuing for over 5 years now and is set to extend with further development of new AI/ML-powered features and functionality.

Oleksandr Boiko: Delivery Director at SPD Technology

Oleksandr Boiko

Delivery Director at SPD Technology

“Probably, one of the biggest achievements for this client is developing an entirely new direct-to-merchant, Poynt Processing all-in-one omnicommerce payment solution in 5 months. In the first 10 months following the launch of Poynt Processing, the number of active merchants exceeded 200, and relatively soon the number increased to thousands.”

Project: BlackHawk Network

BlackHawk Network Inc. (BHN), is a U.S.-headquartered, globally leading provider of branded payment technology solutions, including services like issuing prepaid gift cards, digital payment solutions, rewards programs, and financial technology solutions. This E-commerce development leader employs around 4,000 people and serves 28 countries. BHN has thousands of clients and partners, including such market leaders and iconic brands as Kroger, Simon, Disney, Staples, iTunes, BestBuy, Target, and eBay.

Oleksandr Boiko: Delivery Director at SPD Technology

Oleksandr Boiko

Delivery Director at SPD Technology

“We have been working with this client for over 7 years, and currently have nearly 80 experts dedicated to this client in total, providing advanced E-commerce development services including enterprise-grade consolidated platform development, data migration, and reconciliation, as well as introducing microservices architecture. As a part of our collaboration with BHN, we also developed an Aggregated Merchant Portal (AMP), which now aggregates more than 8000 businesses in the US and a powerful Merchant Settlement Platform.”

Project: PitchBook

PitchBook is a leading financial data provider that covers global venture capital, private equity, and public markets. SPD Technology joined this client over 15 years ago, as software developers for the flagship product – PitchBook Platform. During our partnership, we have grown from a small software development team to a primary full-cycle technology provider and business partner, offering over 200 dedicated experts to this project.

We deliver sophisticated custom software development expertise, as well as our Artificial Intelligence and Machine Learning proficiency for the products including:

  • PitchBook Platform
  • PitchBook Mobile (iOS, Android)
  • PitchBook Excel Plugin
  • PitchBook API
  • PitchBook Data Feeds
  • CRM Integration
  • Chrome Extension
  • PitchBook’s Marketing Website. 

GoodCore Software

  • Location: London, United Kingdom
  • Number of employees: 50-250
  • Pricing: $25-$49/hr
  • Founded: 2005
  • Clients: The Securities Commission of Malaysia
  • Clutch Rating: 5.0

GoodCore Software is a financial software development company based in London. GoodCore Software designs, develops and implements solutions across financial institutions and organizations. The company succeeds in offering such comprehensive services as mobile and internet banking applications, custom CRM systems, and corporate portals. The company also provides regulatory compliance monitoring software, bank branch tracking, and internal communication systems as its key software solutions.

Technology:

  • Java
  • PHP
  • JavaScript
  • ReactJS
  • .Net Core
  • MySQL

Project:

The company developed software to automate processes of unlisted capital market investment products. For many years, wholesale funds, private debt securities, and structured products were managed via Excel sheets and other documentation.

The main challenge for the company was to adapt respective financial calculations, industry rules, and operational needs in an application. The team managed to build robust bespoke software that allows smooth flow and fast operations.

Transparity (ex.Ballard Chalmers)

  • Location: East Grinstead, West Sussex
  • Number of employees: 10-50
  • Pricing: $100-$150/hr
  • Founded: 2005
  • Clients: Ipes, Lighthouse Group, Square Marble Technology
  • Clutch Rating: 4.8

Ballarch Chalmers (recently bought by Transpartity) is one of the UK’s custom software development companies. It holds many years of expertise in enterprise applications on the Microsoft Platform. The company is a Microsoft Gold Partner and delivers high-quality products in the niche market.

Technology:

  • Microsoft .NET
  • Azure
  • SQL Server
  • BizTalk Server
  • SharePoint Server
  • Xamarin

Project:

Ipes is an independent private equity fund services provider that decided to invest in the development of its own platform – CapitalTracker. It aims at providing significant advantages to clients and internal operations.

Ballard Chalmers designed the system with an architecture design and implementation on the Microsoft Application Platform. The team developed the first entirely web-based system in the field. It had an app-based architecture that allowed customizing views of data in real time to every user.

Miquido

  • Location: UK, Poland
  • Number of employees: 50-250
  • Pricing: $50-$100/hr
  • Founded: 2011
  • Clients: TUI, BNP Paribas, Herbalife Nutrition, Skyscanner
  • Clutch Rating: 4.8

Miquido is one of the software development services companies from London, United Kingdom, and Kraków, Poland. The company solves business challenges by applying the latest technology and data-driven research. It offers complex solutions for mobile app development, web development, strategy, and product design. Among the core technologies they use areArtificial Intelligence, Machine Learning, Data Science, and Computer Vision.

Technology:

  • Java
  • Spring
  • PostgreSQL
  • Angular
  • Kotlin
  • Swift
  • Python
  • AWS

Project:

Miquido is known for developing several systems for cloud banking solutions, including web and mobile internet banking, custom AI solutions for credit scoring, cloud core banking, and agency banking. In addition, the company used Machine Learning technology to build an automated scoring engine to process loan applications faster.

Kelton

  • Location: United Kingdom, Poland, USA
  • Number of employees: 50-250
  • Pricing: $50-$100/hr
  • Founded: 2008
  • Clients: Alpha Blue Ocean, NATO ISMERLO, UN
  • Clutch Rating: 4.9

Kelton is a software development company specializing in agile web development and delivering mobile app development services. Their dedicated teams help clients get custom software and improve their critical business processes in order to scale them up. The company operates in the United Kingdom, Poland, and the United States of America, managing to effectively organize offices in three different countries to deliver a comprehensive range of services.

Technology:

  • Python
  • Node.js
  • Angular
  • Polymer
  • React
  • Java

Project:

Kelton provided full-stack software engineering, project management, and User Experience/User Interface design services developing a custom Fintech project for Best Egg.

This platform disrupted the consumer lending industry. The project’s significant loan transactions and expanding customer base to over 600,000 qualified applicants contributed to substantial revenue growth for the client. The high customer satisfaction and positive reviews strengthened its brand reputation, attracting even more borrowers and investors.

Vention

  • Location: United Kingdom, USA, Austria, Poland, Ukraine
  • Number of employees: 3000+
  • Pricing: $50 – $99
  • Founded: 2002
  • Clients: Coca-Cola, PayPal, Vimeo, IBM
  • Clutch Rating: 5.0

Vention has 20+ years of experience in providing custom software development services for technological enterprises, successful startups, and AI-empowered companies worldwide. The company claims to have over 500 award-winning clients with $600,000+ annual savings on average, due to the partnership with a company.

Clients are highly satisfied with the quality of Web and mobile app development, QA, Cloud & DevOps, AR/VR, and AI development, as well as the ability of the software development company to keep pace throughout all planned sprints. Vention has a strong team of engineers across the globe with dedication and technical skill sets acknowledged by the clients.

Technology:

  • React.js
  • Redux
  • AWS
  • C#
  • .NET
  • JavaScript
  • Angular 7

Project:

Vention’s mobile engineers joined StoneX’s in-house team to build native iOS and Android applications for the Forex.com brand, entrusted to make all crucial architecture and tool choices as well as execute them. As a result, StoneX is now able to serve more than 330,000 active retail accounts across 180 countries.

TatvaSoft

  • Location: USA, United Kingdom, Canada, Australia, and India
  • Number of employees: 250-1000
  • Pricing: <$25/hr
  • Founded: 2001
  • Clutch Rating: 4.9

TatvaSoft offers diverse software engineering and development solutions for the Fintech industry, covering areas including but not limited to consumer finance, banking, and insurance. The company heavily relies on its core expertise with Microsoft.Net, Kotlin, and Typescript to provide competitive products in the market and deliver outstanding services for middle and small businesses.

Technology:

  • Microsoft .NET
  • Kotlin
  • TypeScript
  • Java
  • Node
  • PHP
  • Angular
  • React

Project: 

Relying on their web development services expertise, TatvaSoft had to develop a web-based application for an insurance company. After initial research and evaluating possible options, the team offered a .NET-based web solution to provide significantly better management of large scopes of data, claims, accounts, and various types of insurance. The delivered customized solution helped with streamlined project management, increased efficiency in deliveries and services, as well as significantly improved customer satisfaction.

Theodo

  • Location: The UK
  • Pricing: n/a
  • Founded: 2009
  • Clients: BNP Paribas, Societe Generale, Cleo
  • Clutch Rating: 4.7

Theodo provides web, mobile, and software development services. The company states that its mission is to change the way its clients work and help them deliver greater value to their markets through designing and building web, data & mobile applications. Additionally, Theodo offers digital transformation services, as well as generative AI and cloud development services. 

Technology:

  • React Native
  • Firebase
  • Fastlane
  • Testflight
  • Redux
  • Circleci
  • Branch.IO
  • Codepush

Project:

Theodo joined forces with a well-known company, Cleo, and improved the current features of their mobile apps, as Cleo wanted to move away from the technical constraints of Facebook. Therefore, Theodo built a stand-alone mobile application that allowed Cleo to grow. As a result, the company increased the number of new users across the App Store and Play Store, significantly improving business outcomes and achieving the goals of the project.

Tremend Software Consulting

  • Location: United Kingdom, Romania, USA
  • Number of employees: 200
  • Pricing: $25-50
  • Founded: 2005
  • Clients: ING, FirstBank, Raiffeisen Bank, Vodafone
  • Clutch Rating: 4.8

Tremend Software Consulting, a development company based in London, United Kingdom, offers advanced software engineering solutions and integrates robust systems for companies around the globe. The company is client-oriented and stays in touch with clients at every stage of project development, demonstrating deep involvement in the operations of each client.

Technology:

  • Java
  • NodeJS
  • Angular.js
  • Jenkins

Project: 

Tremend showcased its mobile app development expertise, as it integrated Apple Pay Wallet enrollment, InAppProvisioning, and Google Pay Push Provisioning for fast online transactions and payment processing. The client also requested several brand-new features to develop within the mobile applications to resend PIN, renew a card, or suspend any account in case of any malicious actions or fraudulent attempts. As a result, users’ private data becomes better protected, elevating the overall level of security for the client.

One Beyond

  • Location: United Kingdom, USA, Austria, Poland, Ukraine
  • Number of employees: 1000-10,000
  • Pricing: $50-$100/hr
  • Founded: 2007
  • Clients: Augustus Martin, Maxis GBN
  • Clutch Rating: 4.9

One Beyond is a custom software development company that provides Fintech software engineering and builds intuitive, cost-effective solutions for intelligent automation. The company pays close attention to their custom software proficiency, as they put in additional effort to ensure effective coding and smooth work of their software.

Technology:

  • ASP.Net
  • MVC
  • C#
  • HTML5
  • Kendo
  • UI
  • RESTful
  • API
  • SQL Server

Case: 

One Beyond developed a comprehensive Augmented Reality portal system for Thornbridge entirely from scratch. The company used technologies including ASP.NET Core, with SQL Server at the back end and unobtrusive JavaScript (uJS) at the front end. The portal is available across multiple devices so that users can complete different operations in just a few clicks. This solution empowers Thornbridge by offering a seamless and efficient user experience, and reduced time and effort for key tasks, as well as increased productivity and additional cost savings.

Questions to Ask a Specialized Fintech Dev Company to Succeed with the Project

According to Statista, as of March 2024, there were a total of 3,168 Fintech companies in the United Kingdom. With this massive competition, it is super important to ask the right questions, when you approach a custom software development company to build a project that will make a significant impact on the market. Based on our experience, we assembled the most important questions you should ask custom software development agencies. 

How do you ensure your development efforts align with our business goals?

You need to understand how the software development firm integrates your business objectives into its development process and ensures that the final product will meet your strategic needs. 

Look for:

  • Their approach to gathering requirements
  • Their involvement in the initial planning stages
  • How they maintain alignment throughout the project lifecycle
  • Whether they offer any strategy consulting services

How do you handle changing business requirements or pivoting strategies?

Business environments are very dynamic, and your project may need to adapt to new information or market conditions after the development process starts. Ask about their approach to flexibility and the methodologies they use for managing changes and ensuring the project remains on track despite evolving requirements. A flexible approach to project management is crucial to secure success in the modern environment.

How do you stay updated with the latest Fintech trends and innovations?

Speaking of changes, the Fintech industry is evolving rapidly, and staying current with the latest trends and technologies, for example, the implementation of Machine Learning and NLP for businesses is vital. Ask Fintech software development companies about their ongoing training programs, participation in industry conferences, involvement in professional networks, and other strategies they use to keep their knowledge and skills up to date.

Can you provide examples of innovative solutions you’ve implemented for other clients?

Specific examples of past projects can illustrate the software development company’s ability to deliver creative and effective solutions. Look for case studies that demonstrate their problem-solving skills, innovation, and the impact of their work on clients’ businesses, making sure that they are not just completing projects and delivering comprehensive services in the traditional ways.

How do you address security concerns specific to fintech applications and ensure compliance with relevant regulations (e.g., GDPR, PCI-DSS)?

Since this industry works with highly sensitive personal and financial information, it is impossible to overestimate the importance of this question. It is critical to get as many details as you can about the security aspects of their development processes.

Fintech software development companies should provide you with clear answers about:

How do you ensure that the solutions you develop are scalable and can handle increased loads?

While working, for example, with international money transfers in a constantly growing environment, scalability is essential. Don’t be shy about getting detailed answers from custom software development agencies on some critical aspects of scalability, including:

  • Strategies for delivering scalable architectures
  • Experience in the usage of cloud services
  • Load testing practices and experience handling high-traffic applications. 

How do you facilitate collaboration and ensure both parties are aligned throughout the partnership?

Effective collaboration is key to any successful project, so make sure that you are on the same page with software companies. Every company is different in its approach to this but make sure to check their communication tools, frequency of meetings, and how they ensure transparency during the development cycle. 

How do you ensure that the solutions you develop are future-proof and adaptable to new technologies?

Just like the market itself, the technologies are always evolving. What was trending about Machine Learning in Finance yesterday, may not be just as relevant today. So, you need to make sure that bespoke software development vendor ensures that the product remains relevant as the technology progresses. You can get some perspective on this if you ask about:

  • The approach to modular design
  • The usage and development of custom APIs
  • Strategic roadmap for incorporating new technologies as they emerge. 

How do you identify and mitigate potential risks in Fintech projects?

Last but not least, risk mitigation is another critical aspect of custom software development. It is important to know the history of the risks the potential vendor encountered in the past, and even more important, what strategies they implemented to minimize potential risks. 

How To Choose The Right Partner for Software Development

Here are some more tips on how to choose a suitable Fintech software development company for your business needs.

Prioritize Industry Experience

When selecting a Fintech development company, proven industry experience is paramount. Custom software development companies with a history in this industry will more likely understand the unique challenges and opportunities that might come up. The seasoned expertise of established businesses in Fintech development allows them to navigate regulatory complexities, anticipate market trends, and leverage proven project management methodologies to deliver robust solutions according to the most complex requirements. 

So, it makes sense to look for Fintech software development companies that have successfully launched multiple projects in this industry, and have a deep understanding of specifics for web development and mobile app development.

Check References and Case Studies

A reputable Fintech company will have a portfolio of references and case studies showcasing their completed work. Carefully reviewing these materials will provide valuable insights into the Fintech development company’s capabilities, quality of work, and the business impact of their solutions. 

Pay close attention to projects similar to yours, noting how they addressed specific challenges and delivered results. Ensure that the software development firm will be able to handle the project of your scale and is not exclusive to small businesses. 

It will also be a good idea to get in touch with previous clients of your potential software development vendor and discuss their first-hand experiences shedding light on the company’s reliability, professionalism, communication, and problem-solving skills.

Focus on Innovation and Future Readiness

Fintech is one of those industries that is constantly evolving, driven by fast technological advancements and sometimes mind-blowing innovations. The market size of Artificial Intelligence in Fintech alone is valued at 44.08 billion U.S. dollars in 2024 and is expected to grow to 50 billion U.S. dollars in 2029 if Statista is to be believed. 

It makes sense to partner up with a company that drives innovation and focuses on digital transformation by actively using disruptive technologies including Artificial Intelligence, Machine Learning for advanced Data Analytics and security features. It is hard to overestimate the business impact of Big Data, as well, so focus on software development firms that are constantly exploring their involvement in cutting-edge technologies. Companies that invest in research and development, participate in technology conferences, and continuously upgrade their skill sets are more likely to provide solutions that are not only relevant today but also adaptable to future changes.

Pay Attention to Tangible Business Results They Delivered

Ultimately, the effectiveness of a Fintech company is measured by the tangible business results they provide for the clients. Assess the track record of the potential software development vendors in terms of measurable outcomes, such as:

  • Increased revenue
  • Improved user engagement
  • Enhanced security and operational efficiency.

Look for case studies and testimonials that highlight specific metrics and ROI achieved through their solutions. A custom software development company that can demonstrate a consistent ability to drive significant business improvements will be a valuable partner in achieving your goals. Take a look at the case study below to discover some tangible business results we delivered as a part of this project for one of the leading asset management companies in the US.

# AWS infrastructure, # Data Analytics, # Fintech, # Web development
Developing an AI-Enabled Web Crawler Tool for the Premier U.S. Asset Management Company

Highlights Client Our client is one of the premier U.S. asset management companies that employs more than 12 000…

Explore Case

One Last Thing

The ten custom software development companies highlighted in this article are not just the Fintech market players but pioneers in delivering modern digital solutions that enhance and secure user experiences for financial institutions worldwide. Their contributions are helping to democratize access to financial services, empower businesses with new tools, and redefine the boundaries of what’s possible with advanced financial technology.

At SPD Technology, we stand at the forefront of this revolution, delivering innovative solutions and intelligent automation services to clients across diverse business sectors, including Fintech. Our bespoke software development solutions are designed to help our customers drive sustainable growth, exchange their business profitability while mitigating possible risks, ensure operational stability and get predictable returns on investment.Our 700+ team has the technical skills to proudly consider us one of the top software development companies, in London, United Kingdom. If you need any help with custom software products, software integration, business analysis, and strategy consulting, you are always welcome to get in touch!