Honestly, it is crazy how the finance world in the UK is moving faster than ever, and customers aren’t willing to wait around for clunky systems or outdated tools. People now expect payments to be instant, apps to be intuitive, and security to be a given. Off-the-shelf software rarely ticks all those boxes.
That’s why more banks, startups, and even established financial firms are turning to custom fintech applications. These aren’t the one-size-fits-all products type. They’re built around real business models, regulatory needs, and the kind of user experience that keeps people coming back. In this article, we’ll look at the UK companies leading the charge in fintech app development and how they’re helping businesses stay ahead in a highly competitive market.
At Lengreo, we work with companies in different locations in including the UK that need more than just an app built. Our focus is on creating digital products that actually solve problems and fit into the way a business runs. In fintech, that usually means designing apps and platforms that are easy for customers to use but also tough enough to deal with all the security and compliance requirements in the background. We like to get involved early, shaping the idea with our clients in the UK before moving into design and development.
We also spend a lot of time helping companies modernize what they already have. Not everyone needs to start from scratch, and often it’s faster and smarter to upgrade existing systems and connect them to newer tools. And once a product is out in the world, we don’t just hand it over and vanish. We stick around to handle updates, improvements, and whatever new challenges come along as the industry shifts.
Key Highlights:
- We build fintech apps and platforms that balance usability and security
- We help modernize older systems instead of replacing them entirely
- We get involved early to shape ideas into workable products
- We focus on long-term support, not one-off projects
- We combine strategy, design, and engineering in one process
Services:
- Fintech app design and development
- Mobile and web applications
- Legacy system upgrades and integrations
- Product strategy and consulting
- Ongoing support and maintenance
Contact Info:
Hedgehog lab is a digital product studio that works with businesses to design and build software, including fintech applications. They usually start with strategy and user research, making sure the final product doesn’t just function but actually makes sense for the people using it. Their projects range from mobile banking apps to wider financial platforms, often built with a strong focus on usability and clean design.
They also have a track record of supporting companies beyond the initial build. Whether it’s iterating on existing products, scaling up platforms, or helping clients adapt their apps to new technologies, hedgehog lab tends to stick around for the long haul. Their team is based in the UK but collaborates with organizations in different industries, finance being one of the areas where they’ve put a lot of focus.
Key Highlights:
- UK-based digital product studio with a global client base
- Strong focus on design and usability for fintech apps
- Works on both new builds and modernization of existing tools
- Provides long-term support and iteration on products
- Experience across finance and other industries
Services:
- Fintech app design and development
- Mobile and web application development
- Product strategy and user research
- Cloud integration and platform scaling
- Ongoing product maintenance and updates
Contact Info:
- Website: hedgehoglab.com
- Email: info@hedgehoglab.com
- Phone: 0333 2423132
- Address: One Strawberry Lane, Newcastle Upon Tyne, NE1 4BX UK
- LinkedIn: www.linkedin.com/company/hedgehog-lab
- Twitter: x.com/hedgehoglab
- Instagram: www.instagram.com/hedgehog_lab
- Facebook: www.facebook.com/hedgehoglabhq
Infinum is a product development company that builds software for different industries, fintech included. They usually come in at the early stage of a project, helping teams figure out what they actually need before writing a single line of code. Their work tends to cover both design and development, which means they look after the interface as much as the technical side. That combination is useful in finance where apps have to feel simple for users but also meet tough technical and compliance demands.
They don’t only focus on new apps either. Infinum often steps in to upgrade or expand existing systems, tying them into newer technologies so they can keep up with changing business needs. They also provide ongoing support after launch, which is important for fintech where rules, security, and user expectations change quickly. Their approach is fairly straightforward: make sure the software is reliable, easy to use, and capable of adapting over time.
Key Highlights:
- Covers both design and development in fintech projects
- Works on new apps as well as upgrades to existing systems
- Focus on usability alongside compliance and security needs
- Provides support and updates after launch
- Experience across multiple industries, including finance
Services:
- Fintech app design and development
- Mobile and web applications
- System integration and modernization
- Product strategy and consulting
- Ongoing maintenance and support
Contact Info:
- Website: infinum.com
- Email: hello@infinum.com
- Phone: +44 7989 564993
- Address: 8 Devonshire Square London EC2M 4PL UK
- LinkedIn: www.linkedin.com/company/infinum
- Twitter: x.com/infinum
- Facebook: www.facebook.com/infinumcom
- Instagram: www.instagram.com/infinumcom
Appinventiv is a software company that works with businesses to design and build digital products, including a fair amount of fintech projects. They usually get involved early, helping teams shape ideas into something practical before diving into development. Their focus tends to be on making apps that don’t just tick the technical boxes but actually feel natural for people to use, which matters a lot in finance where trust and clarity are everything.
They also take on projects where existing systems need an overhaul. Instead of scrapping everything, Appinventiv often modernizes old platforms, connects them with newer tools, and makes sure they can handle growing demands. They’re not the kind of team that hands over an app and disappears either. Ongoing support and updates are a normal part of their work, especially important in fintech where regulations and user expectations shift quickly.
Key Highlights:
- Works on both new fintech products and upgrades to existing systems
- Balances technical needs with usability and design
- Provides early-stage strategy and consulting support
- Handles integration with newer platforms and tools
- Offers long-term support after launch
Services:
- Fintech app development
- Mobile and web application design and build
- System modernization and integration
- Product strategy and consulting
- Ongoing maintenance and updates
Contact Info:
- Website: appinventiv.com
- Email: sales@appinventiv.com
- Phone: + 44 – 753 – 900 – 0641
- Address: 3rd Floor, 86-90 Paul Street EC2A 4NE London, UK
- LinkedIn: www.linkedin.com/company/appinventiv
- Twitter: x.com/appinventiv
- Instagram: www.instagram.com/appinventiv
GoodCore is a UK-based software development company that works with businesses on custom applications, including plenty of fintech projects. They tend to take a straightforward approach: start by understanding how a company actually runs, then build tools that fit into that setup instead of forcing new workflows. Their projects often include financial platforms, mobile apps, or internal systems that need to handle sensitive data securely without being a pain to use.
They also do a lot of work updating older systems. Many financial firms still rely on outdated platforms, and GoodCore often steps in to modernize those while keeping the parts that still work. They stick with clients after launch too, offering support and improvements so the software can keep up with changes in the business and the industry.
Key Highlights:
- UK-based company with experience in fintech applications
- Focus on tailoring software to fit existing workflows
- Works on both new builds and modernization of legacy systems
- Pays attention to usability alongside security and compliance
- Provides long-term support after delivery
Services:
- Fintech app design and development
- Mobile and web applications
- Legacy system modernization
- Product strategy and consulting
- Ongoing maintenance and support
Contact Info:
- Website: www.goodcore.co.uk
- Email: contact@goodcore.co.uk
- Phone: 020 8781 6903
- Address: Airport House, Purley Way, Croydon CR0 0XZ UK
- LinkedIn: www.linkedin.com/company/goodcore-software
- Facebook: www.facebook.com/goodcoresoftware
Ciklum is one of those companies that doesn’t just show up to write code and leave. They usually work alongside businesses as an extra set of hands (and brains), building fintech products that cover both the flashy stuff customers see and the less glamorous but critical backend systems. Their teams get involved in shaping the idea, designing the product, and then actually making it work. For finance projects, that usually means juggling things like security, compliance, and a lot of moving data.
They also tend to stick around after launch. Instead of doing a quick build and disappearing, Ciklum often sets up dedicated teams that handle ongoing updates and new features as regulations or tech shift. That approach suits financial companies that need constant development but don’t necessarily want to grow huge internal tech departments.
Key Highlights:
- Builds both customer-facing fintech apps and backend systems
- Provides dedicated teams for ongoing development
- Mixes strategy, design, and engineering under one roof
- Focus on compliance and security for financial products
- Works with businesses that need scalable, long-term support
Services:
- Fintech app design and development
Backend system integration and scaling - Dedicated software engineering teams
- Product strategy and consulting
- Ongoing maintenance and feature updates
Contact Info:
- Website: www.ciklum.com
- Email: hello@ciklum.com
- Address: 5th Floor Standon House, 21 Mansell Street, London, United Kingdom, E1 8AA UK
Solusent is a software outfit that works with companies to build digital tools, and a chunk of that work falls into fintech. They don’t just dive straight into coding though. Most projects kick off with them sitting down to figure out what the client actually needs, then shaping apps or platforms around that. In the finance world, that usually means balancing two big things: keeping the user experience simple and making sure the backend is solid enough to handle sensitive data without issues.
They’re also pretty practical when it comes to older systems. Instead of telling clients to throw everything out and start over, Solusent often tweaks or connects existing setups so they work better with new tech. And once something goes live, they don’t just disappear. They hang around to handle updates, fixes, and whatever changes come with shifting rules or new customer expectations.
Key Highlights:
- Builds fintech products that focus on real user needs
- Puts equal weight on usability and secure data handling
- Improves or connects existing systems instead of replacing them outright
- Sticks around after launch for updates and fixes
- Works across industries but has fintech experience
Services:
- Fintech app design and development
- Mobile and web apps
- System upgrades and integrations
- Product planning and consulting
- Ongoing support and maintenance
Contact Info:
- Website: solusent.com
- Email: contact@solusent.com
- Phone: 0203-1938-835
- Address: 31 Balham Hill, London, SW12 9DX UK
- LinkedIn: www.linkedin.com/company/solusent
- Facebook: www.facebook.com/Solusent
- Instagram: www.instagram.com/solusent.io
KindGeek is a software development company that often works with fintech businesses, from startups testing an idea to larger firms looking to scale. They usually get involved early, helping shape the product vision before moving into design and development. Their work covers both customer-facing apps, like mobile banking tools, and the behind-the-scenes platforms that keep financial services running smoothly.
They’re also big on partnerships rather than quick one-off projects. Many of their clients keep them around for ongoing updates, improvements, and support as the product grows. In fintech, where regulations, security demands, and user expectations shift constantly, that kind of long-term collaboration makes a lot of sense.
Key Highlights:
- Experience with fintech apps and financial service platforms
- Works with both startups and established firms
- Focus on long-term collaboration, not just one-time projects
- Handles design and development from early stages
- Balances usability with technical and regulatory needs
Services:
- Fintech app design and development
- Web and mobile applications
- Backend systems for financial services
- Product strategy and consulting
- Ongoing support and maintenance
Contact Info:
- Website: kindgeek.com
- Email: sales@kindgeek.com
- Address: 79018 45 Oleny Stepanivny Str, Lviv, Ukraine
- LinkedIn: www.linkedin.com/company/kindgeek
- Twitter: x.com/kindgeeks
- Facebook: www.facebook.com/kindgeek
- Instagram: www.instagram.com/kindgeeks
Intellectsoft is a software development company that works with businesses to design and build custom digital products, and fintech is one of the areas they’ve put a lot of energy into. They usually step in early, helping companies map out what kind of app or platform actually makes sense before moving into the technical side. Their work often covers both the user-facing side, like mobile apps for payments or banking, and the backend systems that keep financial services reliable and compliant.
They also get involved in modernizing older setups. A lot of financial firms already have systems in place that just need upgrading or connecting to new tools, and Intellectsoft handles that without forcing a complete rebuild. Once a product goes live, they stay on board to help with updates, fixes, and adjustments, which is pretty important in fintech since regulations and customer expectations never really stop changing.
Key Highlights:
- Works on both new fintech apps and backend systems
- Helps companies define product needs before development starts
- Supports modernization of existing platforms
- Focus on usability alongside compliance and security
- Provides long-term support after launch
Services:
- Fintech app design and development
- Mobile and web applications
- System modernization and integration
- Product strategy and consulting
- Ongoing maintenance and updates
Contact Info:
- Website: www.intellectsoft.net
- Email: info@intellectsoft.net
- Phone: +44 20 3887 0078
- Address: 500 Fashion Ave Fl 8A New York City NY 10018, USA
- LinkedIn: www.linkedin.com/company/intellectsoft
- Twitter: x.com/Intellectsoft
- Facebook: www.facebook.com/Intellectsoft
Artkai is an end-to-end development agency that builds and improves digital products for enterprises, making experiences human-centric. They also works with companies in the financial space to build the kind of apps and platforms people actually use every day. Their projects cover a bit of everything from banking apps that need to be simple enough for customers to trust, to bigger systems that sit in the background handling payments, compliance, and all the less visible but critical stuff. They usually take a collaborative approach, shaping the product with clients instead of just building something in isolation.
They’re also not the type to hand over an app and walk away, because the fintech sphere never really stays still. They stick around after launch to keep things updated, patched, and ready for whatever new rules or customer demands come up. That way, the software doesn’t just work at launch but keeps working as the industry changes.
Key Highlights:
- Fintech app design and development
- Works closely with clients to align tools with real operations
- Handles both customer-facing products and backend systems
- Stays involved after launch with updates and improvements
- Keeps compliance and security in focus throughout projects
Services:
- Fintech app design and development
- Focuses on building around how businesses actually operate
- Payment and transaction systems
- System integration and modernization
- Ongoing support and maintenance
Contact Info:
- Website: artkai.io
- Email: hello@artk.ai
- Phone: +44 (738) 967-25-07
- LinkedIn: www.linkedin.com/company/artkai
- Facebook: www.linkedin.com/company/artkai
- Instagram: www.instagram.com/artkaiteam
11. Konstant Infosolutions
Konstant Infosolutions works with companies to build custom digital products, and fintech is one of the spaces they’ve been active in. Their projects usually cover the whole range; Mobile apps, web platforms, and backend systems that keep the financial side of things secure and reliable. They spend a lot of time making sure what they build fits into the client’s business without forcing a bunch of awkward changes to how people already work.
They also help companies deal with the not-so-glamorous side of tech: old systems that still run parts of the business but need a serious upgrade. Konstant often steps in to modernize those setups or tie them into newer platforms. And once a product is out the door, they stick around to handle updates and ongoing support so things don’t break the moment regulations or customer needs shift.
Key Highlights:
- Works on fintech apps, platforms, and backend systems
- Focuses on building around how businesses actually operate
- Helps modernize outdated systems and connect them to new tools
- Balances usability with reliability and security
- Provides long-term support after launch
Services:
- Fintech app development
- Mobile and web applications
- System upgrades and integrations
- Product consulting and strategy
- Ongoing maintenance and updates
Contact Info:
- Website: www.konstantinfo.com
- Email: sales@konstantinfo.com
- Phone: +44-203-239-7253
- LinkedIn: www.linkedin.com/company/konstant-infosolutions-pvt-ltd
- Twitter: x.com/konstantinfo
- Facebook: www.facebook.com/konstant.info
Endava works with financial companies that need their software to actually keep up with the pace of change. They’re usually brought in by banks, payment providers, or fintech firms that want apps and platforms that feel modern on the surface but can also handle the heavy lifting in the background. Their teams mix design, engineering, and strategy, so the end result isn’t just functional but something people actually find easy to use.
A lot of their work also revolves around fixing what’s already there. Many financial firms still run on older systems that can’t easily adapt, and Endava often helps breathe new life into them instead of ripping everything out. They also don’t just ship the product and leave. Their teams stick around, updating and adjusting things so the software can evolve alongside new rules, new tech, and new customer expectations.
Key Highlights:
- Works closely with banks, payment providers, and fintech companies
- Builds both customer-facing apps and complex backend platforms
- Helps modernize legacy systems rather than replace them outright
- Blends design, engineering, and strategy in their approach
- Offers long-term support and updates after launch
Services:
- Fintech app design and development
- Mobile and web applications
- Legacy system modernization
- Payment and transaction platforms
- Product strategy and consulting
- Ongoing support and maintenance
Contact Info:
- Website: www.endava.com
- Phone: +44 20 7367 1000
- Address: 125 Old Broad Street, London, EC2N 1AR, UK
- LinkedIn: www.linkedin.com/company/endava
- Twitter: x.com/endava
- Instagram: www.instagram.com/endava
- Facebook: www.facebook.com/endava
Suffescom works with businesses to create digital products, and fintech has become one of the areas they’ve built up experience in. Their projects often cover mobile and web apps that need to be simple enough for everyday users but also tough enough to handle sensitive financial data. They usually get involved in shaping the product from the start, working with clients to figure out what makes sense before moving into design and development.
They’re also the kind of company that doesn’t just build something and vanish. A big part of their work is tied to supporting products after launch, whether that’s rolling out new features, fixing issues, or adapting systems when regulations or customer needs change. For clients who already have legacy systems, they step in to modernize and connect the old with the new, so businesses don’t have to start from scratch.
Key Highlights:
- Builds fintech products for both customers and internal operations
- Focus on balancing user experience with secure data handling
- Helps modernize and connect legacy systems
- Provides long-term support after launch
- Works across industries but has fintech expertise
Services:
- Fintech app design and development
- Mobile and web applications
- Legacy system upgrades and integrations
- Product planning and consulting
- Ongoing support and maintenance
Contact Info:
- Website: www.suffescom.com
- Email: idea@suffescom.co
- Phone: +44-808-164-8700
- Address: 18 King William St, London EC4N 7BP, United Kingdom
- LinkedIn: www.linkedin.com/company/suffescom
- Twitter: x.com/suffescom
- Facebook: www.facebook.com/SuffescomSolutions
- Instagram: www.instagram.com/suffescom_solutions
Vention works with businesses that need extra engineering power to get their products built, and fintech is one of the areas they’ve spent a lot of time on. Instead of just handling one-off tasks, they usually embed dedicated teams into a client’s setup so development feels more like an extension of the in-house crew than a separate vendor. That’s useful for fintech projects where apps need to scale fast, stay secure, and handle plenty of moving parts behind the scenes.
They also help companies modernize what they already have. Not every project starts from scratch, and Vention often steps in to upgrade legacy platforms or tie them into newer systems. Once products go live, their teams stick around for the ongoing stuff too; updates, fixes, and new features that keep software aligned with regulations and customer expectations.
Key Highlights:
- Provides dedicated engineering teams for fintech projects
- Works on both new builds and modernizing older systems
- Blends into client teams instead of working in isolation
- Balances usability, scalability, and security needs
- Offers ongoing support after launch
Services:
- Fintech app design and development
- Mobile and web applications
- Legacy system upgrades and integration
- Dedicated engineering teams
- Long-term product support and maintenance
Contact Info:
- Website: ventionteams.com
- Email: contact@ventionteams.com
- Phone: +442071172842
- Address: 30 Churchill Place London E14 5RE, UK
- LinkedIn: www.linkedin.com/company/ventionteams
- Twitter: x.com/ventionteams
- Instagram: www.instagram.com/ventionteams
15. Robosoft Technologies
Robosoft Technologies is a digital product company that often works with financial services firms to design and build apps that people actually want to use. They don’t just focus on the shiny customer-facing side, though. Their teams also build the backend systems that keep everything secure and running smoothly. In fintech, that balance between simplicity for users and reliability behind the scenes is pretty much the whole game, and that’s where Robosoft tends to put its energy.
They also take on projects where existing systems need a refresh. Instead of pushing companies to throw out everything, they usually help modernize and connect what’s already there so businesses can keep moving without major disruption. And once something goes live, they don’t just check out. Robosoft stays around to handle updates, improvements, and the ongoing work that comes with changing regulations and customer expectations.
Key Highlights:
- Works on both fintech apps and backend platforms
- Balances usability with compliance and security
- Helps modernize legacy systems rather than replace them completely
- Provides long-term support and product improvements
- Experience across finance and other industries
Services:
- Fintech app design and development
- Mobile and web applications
- System upgrades and modernization
- Backend development and integration
- Ongoing product maintenance and support
Contact Info:
- Website: www.robosoftin.com
- Email: samip.mutha@robosoftin.com
- Address: Floor 9 Appold Street, London, EC2A 2AP, United Kingdom
- LinkedIn: www.linkedin.com/company/robosoft-technologies
- Twitter: x.com/Robosoft
- Instagram: www.instagram.com/robosoft_technologies
- Facebook: www.facebook.com/RobosoftCorpCom
Evoqins is a software team that spends a lot of its time working on fintech projects. They don’t just dive in with a ready-made solution, most of the work starts with sitting down to understand how a business actually runs and what the end users really need. From there, they design and build apps and platforms that balance ease of use on the front end with the kind of reliability and security finance systems can’t do without.
They’re also the kind of crew that knows not every company can toss out their old systems and start fresh. Evoqins often steps in to upgrade and connect existing setups, giving them a new lease of life without creating unnecessary headaches. And once a product is out the door, they don’t disappear. They stick around to keep things updated and working smoothly as new rules, technologies, and customer demands inevitably roll in.
Key Highlights:
- Builds fintech apps with a focus on real user needs
- Balances simple interfaces with secure, reliable backends
- Upgrades and connects existing systems instead of replacing everything
- Works closely with clients instead of pushing generic solutions
- Provides ongoing support after launch
Services:
- Fintech app design and development
- Mobile and web applications
- Legacy system upgrades and integration
- Product strategy and consulting
- Long-term maintenance and support
Contact Info:
- Website: evoqins.com
- Email: connect@evoqins.com
- Phone: +447586183532
- Address: Evoqins, 1 Emperor Way, Exeter EX1 3QS, United Kingdom
- LinkedIn: www.linkedin.com/company/evoqins
- Twitter: x.com/evoqins
- Instagram: www.instagram.com/evoqins
Conclusion
Fintech in the UK isn’t just about banks trying to keep up with digital trends anymore. There’s now a wide mix of companies shaping everything from sleek customer apps to the solid backend systems that keep the money moving. Some focus on building products from the ground up, while others step in to modernize what’s already there, making sure older platforms can handle today’s demands.
What stands out is the range of ways these teams work. You’ll find companies that embed themselves into your setup as if they were part of your own staff, and others that take on the whole project end to end. Some lean heavily into design and usability, while others are more about scaling and technical depth. The upside is choice, businesses can find a partner that matches their way of working instead of having to force a fit.
If you’re exploring fintech development in the UK, a smart move is to start small. A pilot project or feature build is often enough to test how a team works with you. From there, you’ll know whether they’re the kind of partner who can keep pace with your business as both tech and customer expectations keep shifting.
