Banking applications sit at the intersection of mobile product development, financial infrastructure, security, compliance, and data engineering. A typical project may involve customer onboarding, identity verification, card controls, account management, payments, lending workflows, open banking APIs, fraud monitoring, and integration with existing banking systems.
The companies below work across different parts of this stack. The list includes UK-based development firms as well as international engineering companies delivering banking and fintech software for the UK market.
1. Itexus
Itexus develops custom fintech software across digital banking, payments, lending, wealth management, trading, and personal finance. Its banking work covers mobile and online banking platforms, digital wallets, customer onboarding and KYC, card management, money transfers, account aggregation, transaction monitoring, and financial dashboards.
Mobile products can be built with Swift, Kotlin, Flutter, and React Native, alongside web interfaces based on React and Angular and backend systems using Java, .NET, TypeScript, and Python. The company also handles core banking integrations, cloud infrastructure across AWS, Azure, and Google Cloud, legacy modernisation, QA, security testing, and AI-enabled financial functionality. Its portfolio includes a mobile product for SME lending in the UK and Ireland developed with React Native and connected to GDPR-compliant analytics.
Key Highlights:
- Native and cross-platform banking application engineering
- Core banking, payment, and third-party financial integrations
- Cloud architecture and legacy system modernisation
- AI capabilities for fraud, risk, analytics, and personalisation
Services:
- Banking app development
- Digital wallets and payment applications
- KYC and customer onboarding
- Lending and card management software
- Open banking and account aggregation
- Banking system integration and modernisation
Contact Information:
- Website: itexus.com
- Email: [email protected]
- Facebook: www.facebook.com/itexus
- Twitter: x.com/ItexusSoft
- LinkedIn: www.linkedin.com/company/itexus
- Instagram: www.instagram.com/itexus.soft
- Address: Żurawia 6/12/lok 766, 00-503 Warszawa, Poland
2. Waracle
Waracle is a UK digital product company with operations in London, Glasgow, Edinburgh, and Dundee. Its financial services practice works across retail banking, commercial banking, insurance, and wealth products, combining mobile engineering with product strategy, experience design, and data-driven digital services.
Its teams develop native iOS and Android applications, customer-facing banking journeys, digital self-service tools, and mobile experiences connected to existing financial infrastructure. Banking projects have included work for Virgin Money and CYBG, covering mobile banking and financial wellbeing experiences alongside broader digital transformation programmes.
Key Highlights:
- Native iOS and Android product development
- Digital banking UX and customer journey design
- Integration with existing financial platforms
- Product optimisation after launch
Services:
- Mobile banking applications
- Financial product design
- Digital transformation
- Data and analytics solutions
- Application support and optimisation
Contact Information:
- Website: waracle.com
- Phone: 0330 808 4436
- Email: [email protected]
- Facebook: www.facebook.com/waracle
- Twitter: x.com/WaracleUK
- LinkedIn: www.linkedin.com/company/waracle
- Instagram: www.instagram.com/waracle
- Address: 7 Harp Lane, London, EC3R 6DP
3. A-listware
A-listware provides software engineering and development teams for financial services projects, including banking systems, customer applications, payment products, and other fintech platforms. Its financial software scope covers mobile banking, money transfer applications, BNPL products, loan processing, mortgage systems, P2P lending, investment software, and personal finance tools.
The company supports projects through architecture, UI development, backend engineering, integrations, testing, maintenance, and dedicated development teams. It also works with banking infrastructure, payment processing, data-heavy financial applications, and security-focused systems. A-listware maintains a UK presence in St Leonards-on-Sea.
Key Highlights:
- Banking and financial application engineering
- Mobile, web, and hybrid software delivery
- Dedicated development team models
- Payment and lending system development
Services:
- Mobile banking software
- Payment and money transfer applications
- Lending and mortgage platforms
- Investment and personal finance software
- Financial system integration
Contact Information:
- Website: a-listware.com
- Phone: +44 (0)142 439 01 40
- Email: [email protected]
- Facebook: www.facebook.com/alistware
- LinkedIn: www.linkedin.com/company/a-listware
- Address: St. Leonards-On-Sea, TN37 7TA, UK
4. Apadmi
Apadmi develops digital products for banks, fintech businesses, wealth companies, and insurers. Its financial services work includes digital onboarding, KYC, biometric verification, account servicing, payments, investment products, trading tools, and secure customer self-service applications.
The company combines mobile development with product strategy, UX design, systems integration, legacy transformation, analytics, and ongoing application management. It has also developed financial mobile products such as Ebury’s iOS application for managing multi-currency transactions and international payments.
Key Highlights:
- Digital onboarding and identity workflows
- Payment and transaction functionality
- Legacy financial system integration
- Continuous application monitoring and support
Services:
- Banking and fintech app development
- KYC and biometric onboarding
- Payments and transaction platforms
- Wealth and trading applications
- Product support and optimisation
Contact Information:
- Website: www.apadmi.com
- Phone: +44 (0)208 050 1945
- Email: [email protected]
- LinkedIn: www.linkedin.com/company/apadmi-ltd
- Instagram: www.instagram.com/apadmi
- Address: Hamilton House, Mabledon Place, London, United Kingdom, WC1H9BB
5. hedgehog lab
hedgehog lab is a digital product consultancy headquartered in Newcastle upon Tyne. Its financial services work covers mobile fintech products, investment and portfolio platforms, customer-facing applications, and software connected to payment and lending infrastructure.
The development practice includes native iOS and Android engineering as well as Flutter-based cross-platform applications. Financial products can incorporate payment providers, loan origination systems, payment gateways, ERP software, and other business systems, with product discovery, UX, cloud engineering, and application development handled within the wider delivery process.
Key Highlights:
- Native and Flutter mobile development
- Financial platform integration
- Product discovery and UX engineering
- Experience with regulated digital products
Services:
- Fintech mobile applications
- Investment and portfolio software
- Payment system integration
- Product design and prototyping
- Cloud and application engineering
Contact Information:
- Website: hedgehoglab.com
- Phone: 0333 2423132
- Facebook: www.facebook.com/hedgehoglabhq
- Twitter: x.com/hedgehoglab
- LinkedIn: www.linkedin.com/company/hedgehog-lab
- Instagram: www.instagram.com/hedgehog_lab
- Address: 5 St Thomas Street, Newcastle Upon Tyne, NE1 4LE
6. Net Devs
Net Devs is a software engineering company working across enterprise applications, fintech systems, cloud platforms, and AI engineering. Its fintech practice focuses on high-reliability software with auditability, encryption, access controls, data residency requirements, and engineering patterns designed for recoverable financial transactions.
Backend development spans .NET, JVM technologies, Node.js, Python, and Go, while frontend projects use React, Angular, Vue, and TypeScript. The company also works with Azure, AWS, Google Cloud, Terraform, and Kubernetes, alongside legacy modernisation, platform engineering, dedicated development teams, and AI systems based on RAG, agents, and LLM operations.
Key Highlights:
- Reliability patterns for transaction-heavy systems
- Encryption, audit trails, and access-control engineering
- Cloud-native and infrastructure-as-code delivery
- Modernisation of legacy financial applications
Services:
- Fintech software engineering
- Backend and frontend development
- Cloud and platform engineering
- Legacy application modernisation
- Dedicated engineering teams
Contact Information:
- Website: net-devs.com
- Phone: +48 571 282 759
- Email: [email protected]
- LinkedIn: www.linkedin.com/company/net-devs
- Address: Obrzeżna 1D, 02-691 Warszawa
7. Magora
Magora operates a London-based software development practice covering fintech applications, mobile products, and custom financial platforms. Its fintech engineering work includes open banking applications, digital wallets, lending products, investment and trading systems, card functionality, KYC and AML workflows, and payment processing.
Mobile development includes Swift, Kotlin, React Native, and Flutter. Financial integrations can involve providers such as TrueLayer, Plaid, GoCardless, Stripe, Marqeta, and Adyen, while identity workflows can connect to external verification services. The company also works with backend architecture, real-time data, analytics, and cloud infrastructure.
Key Highlights:
- Open banking API implementation
- Native and cross-platform mobile engineering
- Payments, cards, and identity integrations
- Real-time financial data processing
Services:
- Mobile banking applications
- Open banking software
- Digital wallets
- Lending and investment platforms
- KYC and AML integration
- Payment and card systems
Contact Information:
- Website: magora-systems.com
- Phone: +44 20 7183 5820
- Email: [email protected]
- LinkedIn: www.linkedin.com/company/magora-systems
- Address: Office 4.01, 4th Floor, 56 Shoreditch High St, London E1 6JJ
8. Sonin
Sonin is a UK digital product agency with operations in Surrey and Edinburgh. Its financial application work includes software developed for FCA-regulated environments, with projects spanning banking, fintech, insurance, and personal finance.
The company’s banking capabilities cover account dashboards, open banking functionality, card management, financial data access, and customer-facing mobile products. Delivery can include product discovery, UX and UI design, mobile and web development, systems integration, security controls, data residency planning, audit trails, and continued product development.
Key Highlights:
- Experience with FCA-regulated product environments
- Open banking and card-management functionality
- Auditability and controlled access to financial data
- Product delivery from discovery through support
Services:
- Financial app development
- Banking application development
- Open banking functionality
- Product strategy and UX
- System integration and maintenance
Contact Information:
- Website: sonin.agency
- Phone: 01737 45 77 88
- Email: [email protected]
- LinkedIn: www.linkedin.com/company/sonin
- Address: Sonin, 34 Bell Street, Reigate, Surrey, RH2 7SL
9. Vention
Vention provides software engineering services for banks and fintech companies, with a UK operation in London. Its mobile banking work includes consumer banking applications, business banking products, personal finance tools, payment applications, investment software, and digital services for younger banking customers.
Financial projects can incorporate open banking, Strong Customer Authentication, payment flows, account management, budgeting, transaction history, and integrations with existing banking infrastructure. Engineering teams cover native and cross-platform mobile development, backend systems, cloud technology, QA, data engineering, and application security.
Key Highlights:
- London-based UK delivery presence
- Consumer and business mobile banking systems
- Open banking and SCA implementation
- Backend, mobile, cloud, and QA engineering
Services:
- Mobile banking development
- Business banking applications
- Payment and personal finance apps
- Banking software engineering
- Cloud and data development
Contact Information:
- Website: ventionteams.com
- Phone: +442071172842
- Email: [email protected]
- Twitter: x.com/ventionteams
- LinkedIn: www.linkedin.com/company/ventionteams
- Instagram: www.instagram.com/ventionteams
- Address: 30 Churchill Place, E14 5RE
10. Scott Logic
Scott Logic is a UK software consultancy with extensive work across banking and financial services. Its engineering teams develop customer applications, trading and investment technology, open banking APIs, digital savings products, and software used alongside established financial platforms.
Projects combine software engineering with experience design, cloud architecture, data, and legacy modernisation. Its work for Newcastle Building Society included a cross-platform savings application and supporting cloud infrastructure, while other financial projects have involved mobile payments, banking APIs, and complex enterprise platforms.
Key Highlights:
- UK-based financial software consultancy
- Open banking API engineering
- Cross-platform savings and banking applications
- Cloud and legacy transformation capability
Services:
- Banking application development
- Financial platform engineering
- Open banking APIs
- Cloud modernisation
- UX and product design
Contact Information:
- Website: www.scottlogic.com
- Phone: +44 20 3787 4085
- LinkedIn: www.linkedin.com/company/scott-logic-limited
- Address: 6th Floor, The Lumen, St James Boulevard, Newcastle Helix, Newcastle upon Tyne, NE4 5BZ
11. Brightec
Brightec is a UK mobile app development company based in Shoreham-by-Sea. Its financial application work covers pension, investment, retirement, and money-management products built around mobile access to complex account and financial data.
The company provides product strategy, UX and UI design, iOS and Android development, cross-platform engineering, testing, and post-launch improvement. Financial projects have included applications developed with Willis Towers Watson for pension and benefits-related services.
Key Highlights:
- Mobile-first financial product development
- Financial data visualisation and customer UX
- iOS and Android engineering
- Continued app maintenance and iteration
Services:
- Finance mobile apps
- Finance app development
- Product and UX design
- Mobile QA and testing
- Application support
Contact Information:
- Website: www.brightec.co.uk
- Phone: (+44) 1273 625959
- Email: [email protected]
- Facebook: www.facebook.com/BrightecApps
- Twitter: x.com/brightec
- LinkedIn: www.linkedin.com/company/brightec
- Instagram: www.instagram.com/brightecapps
- Address: Unit 1 Ground Floor, Riverside Business Centre, Brighton Road, Shoreham-by-Sea, BN43 6RE
12. Infinum
Infinum is a digital product development company with a London office in the City and a registered UK entity. Its banking work covers mobile banking applications, digital account opening, payments, card management, transaction tracking, personal lending, investment functionality, and customer-facing financial services.
The company handles product strategy, UX and UI design, iOS and Android development, backend architecture, quality assurance, analytics, and ongoing product development. Its banking projects have included native mobile applications for Croatian Postal Bank and Raiffeisenbank, incorporating PSD2-compliant payment functionality, digital onboarding, wallet integrations, microservices architecture, loan workflows, and connections with enterprise banking systems.
Key Highlights:
- Native iOS and Android banking engineering
- PSD2-compliant payment and authentication functionality
- Microservices architecture for banking platforms
- Digital onboarding and account-opening workflows
Services:
- Mobile banking app development
- Digital account opening
- Payment and card functionality
- Banking UX and product design
- Backend and API development
- Banking application QA and optimisation
Contact Information:
- Website: infinum.com
- Phone: +44 7989 564993
- Email: [email protected]
- Facebook: www.facebook.com/infinumcom
- Twitter: x.com/infinum
- LinkedIn: www.linkedin.com/company/infinum
- Instagram: www.instagram.com/infinumcom
- Address: 8 Devonshire Square, London EC2M 4PL
13. Endava
Endava provides technology consulting and software engineering across banking, payments, insurance, and capital markets. Its retail banking work includes digital banking products, customer mobile applications, core system modernisation, payment transformation, and integration between new digital channels and established financial infrastructure.
Engagements can cover strategy, experience design, architecture, development, cloud migration, data, testing, and managed services. Banking projects include modernisation of online and mobile services, new digital-bank capabilities, lending workflows, and replacement or integration of core financial systems.
Key Highlights:
- Core banking and payments modernisation
- Digital and mobile banking engineering
- Integration of new channels with legacy platforms
- Cloud, data, and quality engineering
Services:
- Digital banking development
- Mobile financial applications
- Core system modernisation
- Payments transformation
- Cloud and data engineering
Contact Information:
- Website: www.endava.com
- Facebook: www.facebook.com/endava
- LinkedIn: www.linkedin.com/company/endava
- Instagram: www.instagram.com/endava
- Address: 125 Old Broad Street, London, EC2N 1AR, UK
14. The Distance
The Distance is a UK app development agency with offices in London and York. Its services cover mobile and web product development, product strategy, UX and UI, systems integration, automation, QA, and continued application optimisation.
The company develops digital products in financial services alongside projects in other regulated and transaction-heavy sectors. Its portfolio includes work with PayStream on fintech applications, with delivery extending from product planning and interface design through engineering, integration, testing, and ongoing platform development.
Key Highlights:
- UK-based mobile product teams
- Product strategy combined with application engineering
- API and business-system integration
- Long-term product maintenance
Services:
- Mobile app development
- Fintech product development
- UX and UI design
- Systems integration
- QA and application optimisation
Contact Information:
- Website: thedistance.co.uk
- Phone: 01904 21 71 71
- Email: [email protected]
- Twitter: x.com/thedistancehq
- LinkedIn: www.linkedin.com/company/the-distance
- Instagram: www.instagram.com/thedistancehq
- Address: 90 York Way, London, N1 9AG
15. Andersen
Andersen provides custom software development with a representative office in London and a dedicated financial technology practice. Its fintech portfolio includes digital banking, personal finance, payment and card platforms, treasury systems, digital wallets, lending software, and compliance-related applications.
The company develops native and cross-platform mobile products alongside backend services, web platforms, cloud systems, data solutions, and integrations. Financial projects published by Andersen include mobile banking, card issuing and payment infrastructure, treasury management, cryptocurrency wallets, and loan-management software.
Key Highlights:
- London delivery presence
- Mobile banking and personal finance engineering
- Payment, card, and treasury system experience
- Full-stack and cloud development capability
Services:
- Banking software development
- Mobile fintech applications
- Payment and card platforms
- Lending software
- Financial data and cloud engineering
Contact Information:
- Website: andersenlab.com
- Phone: +44 207 048 6755
- Email: [email protected]
- Facebook: www.facebook.com/AndersenSoftwareDev
- Twitter: x.com/AndersenLabs
- LinkedIn: www.linkedin.com/company/andersen-europe
- Instagram: www.instagram.com/andersen.global
- Address: 1 St Katharine’s Way, 6th floor, London E1W 1YL, UK
16. 10Pearls
10Pearls develops digital banking and fintech software through its UK operation and wider engineering organisation. Its financial services capabilities cover web and mobile banking, digital onboarding, KYC, fraud detection, payment gateways, lending, wallets, wealth technology, and regulatory technology.
Delivery spans product strategy, experience design, mobile and web development, core system integration, cloud engineering, data, AI, and quality assurance. Banking systems can incorporate account servicing, payment processing, identity verification, fraud controls, financial analytics, and interfaces to existing banking platforms.
Key Highlights:
- Digital banking and fintech engineering
- KYC and fraud-management functionality
- Payments, wallets, and lending applications
- AI, cloud, and data capabilities
Services:
- Mobile and web banking development
- Digital onboarding
- Payment software
- Lending and wealth platforms
- AI and data engineering
Contact Information:
- Website: 10pearls.com
- Phone: +44 7957 620104
- Email: [email protected]
- Facebook: www.facebook.com/10Pearls
- Twitter: x.com/TenPearls
- LinkedIn: www.linkedin.com/company/10pearls
- Address: 2 Kingdom Street, Paddington, London, W26BD
17. Zudu
Zudu is a digital product company based in Edinburgh. Its development practice covers custom mobile applications, web products, software integrations, cloud technology, and digital transformation for sectors that include financial services and other regulated industries.
Financial projects can involve secure data systems, customer-facing applications, workflow digitisation, integration with existing business platforms, and replacement or extension of legacy software. Zudu also provides product design, mobile development, cloud enablement, automation, AI implementation, and continued software improvement.
Key Highlights:
- Edinburgh-based digital product team
- Secure application and data engineering
- Legacy system integration and modernisation
- Mobile, cloud, and automation capabilities
Services:
- Mobile application development
- Financial software development
- Systems integration
- Cloud enablement
- Product design and support
Contact Information:
- Website: zudu.co.uk
- Phone: +44 (0) 20 3154 7570
- Email: [email protected]
- LinkedIn: www.linkedin.com/company/zudu
- Instagram: www.instagram.com/zuduofficial
- Address: Clockwise, Commercial Quay, 84 Commercial St, Leith, Edinburgh EH6 6LX
18. Thoughtworks
Thoughtworks is a technology consultancy with a UK and Ireland operation and a dedicated banking practice spanning digital banking, lending, payments, core platforms, and financial technology modernisation. Its banking engineering work includes omnichannel platforms, connected banking, app consolidation, composable architectures, digital lending systems, and integration between customer-facing products and existing financial infrastructure.
The company also develops mobile banking products and supports digital banks from product strategy through engineering and platform evolution. Its work has included the retail banking app for Allied Irish Bank and the development of B-Social, a UK digital banking product combining mobile expense management with debit-card functionality. Banking engagements can also involve cloud migration, core system transformation, architecture remediation, data platforms, security, and continuous delivery.
Key Highlights:
- Mobile and omnichannel banking product engineering
- Composable and connected banking architectures
- Core banking and cloud modernisation
- Digital lending platform development
Services:
- Mobile banking application development
- Digital banking platforms
- Banking app consolidation
- Core system modernisation
- Digital lending solutions
- Cloud and platform engineering
Contact Information:
- Website: www.thoughtworks.com
- Email: [email protected]
- Facebook: www.facebook.com/Thoughtworks
- Twitter: x.com/thoughtworks
- LinkedIn: www.linkedin.com/company/thoughtworks
- Instagram: www.instagram.com/thoughtworks
- Address: Endeavour House, 3rd Floor, 179-199 Shaftesbury Avenue, London, England, WC2H 8JR
19. DeepInspire
DeepInspire develops mobile and digital banking software from its UK operation in London. Its banking services cover native iOS and Android applications, cross-platform products, digital banking platforms, neobank applications, business banking tools, payment and wallet systems, and API integrations.
Banking applications can include account and transaction management, payments and transfers, card controls, budgeting tools, multi-user approvals, customer onboarding, identity verification, and biometric authentication. DeepInspire also implements Open Banking integrations, multi-factor authentication, encryption, role-based access controls, transaction monitoring, fraud-detection functionality, security testing, and post-launch application maintenance.
Key Highlights:
- Native and cross-platform banking application engineering
- Open Banking and banking API integrations
- Multi-layer authentication and security architecture
- Retail, corporate, and digital-only banking products
Services:
- Mobile banking app development
- Digital and neobank platforms
- Open Banking integration
- Payment and transfer functionality
- Card and account management
- Banking application support and maintenance
Contact Information:
- Website: deepinspire.com
- Phone: +44 20 4577 1162
- Email: [email protected]
- Facebook: www.facebook.com/deepinspire
- Twitter: x.com/DeepInspireCom
- LinkedIn: www.linkedin.com/company/deepinspire
- Instagram: www.instagram.com/deepinspire_com
- Address: 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ, UK
Conclusion
Banking application development usually extends well beyond the mobile interface. Architecture decisions affect identity management, transaction processing, integrations, data security, auditability, performance, and the ability to introduce new financial products without repeatedly restructuring the platform. Open banking connectivity, payment infrastructure, core banking APIs, fraud controls, and operational monitoring may also sit inside the same delivery scope.
The selection process should therefore start with the systems and workflows the product has to support. A new digital banking product may require discovery, UX, mobile and backend engineering, cloud infrastructure, and compliance work from the beginning, while an established bank may place more emphasis on legacy modernisation, API layers, mobile-channel replacement, data migration, and gradual integration with existing core systems.