Businesses looking for fintech software development companies in London can choose from financial technology specialists, product development teams and larger engineering consultancies. This list covers companies with a London presence alongside providers serving the UK from other locations, with those differences identified in each entry. Compare their financial software experience, project focus and delivery services to find a suitable match for your requirements.
1. Itexus
Itexus develops financial software for banks, brokers, investment firms and fintech businesses. Its work covers digital banking, trading platforms, wealth management, payments and lending, including the integrations that connect these products to financial infrastructure. The company is headquartered in the United States, has development offices in Europe and serves the UK market.
Projects can include product discovery, interface design, backend development, testing and ongoing support. Itexus also handles legacy modernisation and project recovery, making its services relevant to businesses extending an existing platform as well as those building a new financial product.
Key Facts
- Core services: Fintech software development, mobile applications, integrations, testing and maintenance.
- Financial domains: Banking, trading, wealth management, payments, lending and insurance.
- Project focus: New products, complex integrations and legacy system modernisation.
- Geographic coverage: US headquarters and European development offices, serving the UK market.
Contact Information
- Website: itexus.com
- E-mail: moc.suxeti@ofni
- Facebook: www.facebook.com/itexus
- Twitter: x.com/ItexusSoft
- LinkedIn: www.linkedin.com/company/itexus-fintech-software
- Instagram: www.instagram.com/itexus.soft
- Address: 8, The Green, STE road, Dover, DE 19901
2. GoodCore
GoodCore builds bespoke financial software from its UK base in Croydon, Greater London. Its services include fintech product development, cloud migration, API integration and upgrades to existing systems. The company has developed a loan management system for a UK loan provider, giving lenders a relevant example to review during supplier selection.
Its delivery process runs from discovery and design through development, deployment and maintenance. Alongside new applications, GoodCore works on business-critical platforms that need to remain operational while their underlying technology changes. Its broader engineering services also cover integrating AI into existing systems.
Key Facts
- Core services: Bespoke development, cloud migration, API integration and ongoing support.
- Financial domains: Banking, lending, investing and payments.
- Relevant project: Loan management software for a UK loan provider.
- Location: Croydon, Greater London, UK.
Contact Information
- Website: www.goodcore.co.uk
- E-mail: ku.oc.erocdoog@tcatnoc
- Facebook: www.facebook.com/goodcoresoftware
- LinkedIn: www.linkedin.com/company/goodcore-software
- Address: Airport House, Purley Way, Croydon CR0 0XZ
- Phone: 020 8781 6903
3. Scott Logic
Scott Logic works with investment banks and capital markets businesses on complex financial systems. Its UK-based consultants develop trading applications, modernise legacy platforms and build data pipelines, analytics tools and reporting workflows. The company has a London office alongside other UK locations.
Its financial services portfolio includes work on the HTML5 charting component of SaxoTraderGO. That experience gives buyers a concrete example of its work on interfaces used by traders. Scott Logic also supports operational resilience and the controls surrounding financial software, including auditability and regulatory reporting requirements.
Key Facts
- Core services: Bespoke engineering, data platforms, legacy modernisation and testing.
- Specialisation: Capital markets and investment banking technology.
- Relevant project: HTML5 charting for SaxoTraderGO.
- Location: London office with additional UK teams.
Contact Information
- Website: www.scottlogic.com
- E-mail: moc.cigolttocs@snoitacilppa
- LinkedIn: www.linkedin.com/company/scott-logic-limited
- Address: Office 0109, Cannon Green, 27 Bush Lane, London, EC4R 0AN
- Phone: +44 20 3787 4085
4. A-listware
A-listware provides custom financial software development and dedicated engineering teams. Its financial services offering covers web applications, mobile products and systems combining both, with work across banking, insurance, lending and investment. Its UK location is St Leonards-on-Sea, East Sussex, so it offers an option outside London for businesses considering distributed delivery.
Beyond application development, A-listware provides quality assurance, infrastructure support and cybersecurity services. Buyers can consider it for projects requiring additional engineering capacity or a combination of software development and technical support. Its team model also allows businesses to bring external specialists into their development operations.
Key Facts
- Core services: Financial software development, dedicated teams, QA and technical support.
- Product types: Web applications, mobile applications and custom fintech systems.
- Financial domains: Banking, insurance, lending and investment.
Contact Information
- Website: a-listware.com
- E-mail: moc.erawtsil-a@ofni
- Facebook: www.facebook.com/alistware
- LinkedIn: www.linkedin.com/company/a-listware
- Address: St. Leonards-On-Sea, TN37 7TA, UK
- Phone: +44 (0)142 439 01 40
5. GFT Technologies
GFT Technologies supports financial institutions with core banking modernisation, cloud technology, data platforms and software engineering. Its London office provides a local point of contact within a wider international delivery organisation. The company's financial services work includes credit risk technology for Deutsche Bank and digital banking delivery for Salt Bank.
GFT's focus is particularly relevant to established institutions replacing or extending major systems. Projects may involve changes across applications, infrastructure and data rather than a single customer-facing app. Its services also include AI-supported modernisation and automation within existing technology environments.
Key Facts
- Core services: Core banking modernisation, cloud delivery, data engineering and AI implementation.
- Project focus: Enterprise financial systems and banking transformation.
- Relevant clients: Deutsche Bank and Salt Bank.
Contact Information
- Website: www.gft.com
- Facebook: www.facebook.com/gfttechnologies
- Twitter: x.com/gft\_tech
- LinkedIn: www.linkedin.com/company/gft-technologies
- Instagram: www.instagram.com/gft\_tech
- Address: 9th floor, 107 Cheapside, London. EC2V 6DN
- Phone: +44 20 3372 9200
6. Kindgeek
Kindgeek combines custom fintech development with pre-built financial software and dedicated teams. Its platform offering covers areas such as neobanking, payments, personal finance management and lending. London and Lviv form part of its business presence, with a separate sales contact for London.
The company gives buyers a choice between commissioning a bespoke product and adapting existing fintech infrastructure. Its work includes banking and payment applications, with Jaja Finance among its portfolio examples. Kindgeek also handles integrations with banking APIs, payment processors and card networks, alongside advisory services and AI implementation.
Key Facts
- Core services: Custom fintech development, white-label platforms, dedicated teams and consulting.
- Financial domains: Banking, payments, lending and personal finance management.
- Delivery options: Bespoke software or adaptation of pre-built platforms.
- Geographic presence: London and Lviv.
Contact Information
- Website: www.kindgeek.com
- E-mail: moc.keegdnik@selas
- Facebook: www.facebook.com/kindgeek
- Twitter: x.com/kindgeeks
- LinkedIn: www.linkedin.com/company/kindgeek
- Instagram: www.instagram.com/kindgeeks
7. Endava
Endava provides engineering and technology services across retail banking, commercial banking and capital markets. Based in London, it helps financial institutions modernise core systems, improve data use and develop customer-facing services. Payments form another part of its industry offering.
Its financial services work includes organisational dashboards and cloud-based workflow systems. The breadth of its services makes it relevant to programmes where software development must sit alongside infrastructure changes, data engineering and operational improvement. Endava also works as an extension of banking teams, supporting institutions that retain internal ownership of their technology strategy.
Key Facts
- Core services: Software engineering, core modernisation, data solutions and cloud delivery.
- Financial domains: Retail banking, commercial banking, capital markets and payments.
- Project focus: Financial institution transformation and enterprise delivery.
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
8. DataArt
DataArt develops and modernises software for financial services organisations, with a London office supporting its UK presence. Its work spans banking, lending, asset management, capital markets, insurance and payments. Services include core platform upgrades, onboarding and KYC workflows, reporting systems and financial data infrastructure.
The company also handles cloud development, quality engineering and ongoing support. Its portfolio includes Invesco's Basecamp platform for financial advisers. For buyers comparing providers, DataArt is especially relevant where a project depends on consolidating data, integrating multiple systems or improving the reliability of an established financial platform.
Key Facts
- Core services: Custom software, legacy modernisation, data engineering and cloud development.
- Financial domains: Banking, asset management, capital markets, insurance and payments.
- Relevant project: Invesco Basecamp.
- UK presence: London office.
Contact Information
- Website: www.dataart.com
- E-mail: moc.traatad@selas-ku
- Facebook: www.facebook.com/dataart
- Twitter: x.com/DataArt
- LinkedIn: www.linkedin.com/company/dataart
- Address: 55 King William Street, London, EC4R 9AD, United Kingdom
- Phone: +44 (0) 20 7099 9464
9. Andersen
Andersen develops custom platforms for banks, fintech startups, neobanks and other financial institutions. Its services cover product consulting, web and mobile applications, interface design, MVP development and long-term maintenance. The company has a representative office in London and delivery operations in other countries.
Its fintech development work includes payment processing, lending platforms, wealth management tools and third-party integrations. Andersen also provides security testing and tools supporting compliance workflows. Businesses can engage it for a new product or bring additional engineers into an existing programme through its dedicated team and staff augmentation services.
Key Facts
- Core services: Fintech development, UX/UI design, integrations, testing and maintenance.
- Financial domains: Banking, payments, lending and wealth management.
- Engagement options: Project delivery, dedicated teams and staff augmentation.
Contact Information
- Website: andersenlab.com
- E-mail: moc.balnesredna@tcatnoc
- Facebook: www.facebook.com/AndersenSoftwareDev
- Twitter: x.com/AndersenLabs
- LinkedIn: www.linkedin.com/company/andersen-softwaredev
- Instagram: www.instagram.com/andersen.global
- Address: 1 St Katharine's Way, 6th floor, London E1W 1YL, UK
- Phone: +44 207 048 6755
10. ELEKS
ELEKS builds financial applications for banks, asset managers, fund administrators and trading businesses. Its services cover the investment lifecycle, including portfolio operations, trading and post-trade workflows, reporting and risk analysis. The company also develops banking applications and payment platforms, with a London office supporting its international delivery organisation.
Its technical offering extends to software re-engineering, cloud migration, data science and quality assurance. That combination is relevant when financial product development involves both a user application and substantial work on the systems behind it, such as data processing, transaction handling or integration with existing software.
Key Facts
- Core services: Financial application development, re-engineering, cloud migration and QA.
- Financial domains: Banking, investment management, trading, cards and payments.
- Product types: Desktop, web and mobile software.
Contact Information
- Website: eleks.com
- Facebook: www.facebook.com/ELEKS.Software
- Twitter: x.com/ELEKSSoftware
- LinkedIn: www.linkedin.com/company/eleks
- Address: Moor Place, 1 Fore Street Avenue, London, UK, EC2Y 9DT
- Phone: +44-20-4583-0843
11. Softwire
Softwire helps financial services businesses modernise software, improve data infrastructure and turn AI prototypes into operational systems. Its London team works within a UK consultancy whose services include digital product development, systems engineering and customer experience design.
Financial services examples include work with Starling Bank, Railpen and Tax Systems. These projects give buyers a range of references across digital banking delivery, pension data and tax software. Softwire's focus on existing systems and data foundations is useful for organisations that need to introduce new capabilities while continuing to operate established platforms and reporting processes.
Key Facts
- Core services: Systems engineering, digital product development, data platforms and AI implementation.
- Project focus: Legacy modernisation and financial data infrastructure.
- Relevant clients: Starling Bank, Railpen and Tax Systems.
Contact Information
- Website: www.softwire.com
- E-mail: moc.eriwtfos@ofni
- Address: 315 Highgate Studios, 53-79 Highgate Road, London NW5 1TL
- Phone: +44 (0)20 7485 7500
12. Intellectsoft
Intellectsoft offers financial software development covering online banking, mobile financial applications, payments and blockchain systems. It combines application engineering with product design, system integration and dedicated development teams. The company has a London presence within its international operations.
Its banking services include custom online platforms, mobile interfaces and connections to existing banking systems. Intellectsoft also builds AI-based financial tools and provides data and business intelligence services. Its range is relevant to businesses looking for a product engineering partner that can handle both customer-facing software and the supporting application architecture.
Key Facts
- Core services: Custom software, mobile development, system integration and dedicated teams.
- Financial domains: Online banking, payments and digital financial services.
- Additional capabilities: AI development, data analytics and product design.
- UK presence: London.
Contact Information
- Website: www.intellectsoft.net
- E-mail: ten.tfostcelletni@ofni
- Facebook: www.facebook.com/Intellectsoft
- Twitter: x.com/Intellectsoft
- LinkedIn: www.linkedin.com/company/intellectsoft
- Address: 500 Fashion Ave Fl 8A, New York City, NY 10018, USA
- Phone: +44 20 3887 0078
13. Computools
Computools develops digital banking platforms, payment systems, investment software and financial risk management tools. Its London office is on St Bride Street. The company's broader services include software engineering, modernisation, data engineering, cloud migration and dedicated development teams.
Its financial portfolio includes a banking platform integrated with Visa card processing, with features such as transaction controls, spending limits and parental approvals. That gives buyers an example of work combining customer interfaces with payment infrastructure. Computools also develops financial analytics software, supporting projects where data processing is a central part of the product.
Key Facts
- Core services: Financial software, system modernisation, data engineering and cloud migration.
- Financial domains: Banking, payments, investment and risk management.
- Relevant capability: Banking platform integration with Visa card processing.
Contact Information
- Website: computools.com
- E-mail: moc.slootupmoc@so
- Address: London, Second Floor Office, 10 St Bride Street, EC4A 4AD
- Phone: +48 516 280 275
14. 10Pearls
10Pearls provides custom fintech development alongside product design, software modernisation and quality assurance. Its financial services offering includes risk management systems, regulatory technology and insurance software. The company has a London office in Paddington as part of its international operations.
Its services also cover AI and machine learning, including fraud detection, risk monitoring dashboards and automated financial workflows. A finance and procurement platform modernisation project illustrates its work on established enterprise software. Buyers can consider 10Pearls when the brief combines application development with changes to architecture, testing or software delivery processes.
Key Facts
- Core services: Fintech development, product design, modernisation and QA.
- Financial specialisations: Risk management, regulatory technology and insurance software.
- Additional capabilities: AI, machine learning and workflow automation.
Contact Information
- Website: 10pearls.com
- E-mail: moc.slraep01@ofni
- Facebook: www.facebook.com/10Pearls
- Twitter: x.com/TenPearls
- LinkedIn: www.linkedin.com/company/10pearls
- Address: 2 Kingdom Street, Paddington, London, W26BD
- Phone: +44 7355 204066
15. Synechron
Synechron provides software engineering and consulting for financial services organisations, with an office in London. Its financial sector work spans investment banking, capital markets, wealth management, retail banking and payments. Services include product engineering, legacy modernisation, cloud delivery and data integration.
The company also implements and upgrades established financial platforms, including Murex. That capability is relevant to institutions combining custom development with third-party trading or banking systems. Its engineering work includes test automation and DevOps, giving financial businesses support across implementation and the processes needed to maintain and release software.
Key Facts
- Core services: Software engineering, systems integration, modernisation, cloud and DevOps.
- Financial domains: Banking, capital markets, wealth management and payments.
- Platform experience: Murex implementation, upgrades and testing.
- Geographic presence: London office within a global delivery network.
Contact Information
- Website: www.synechron.com
- LinkedIn: www.linkedin.com/company/synechron
- Instagram: www.instagram.com/synechroninc
- Address: Level 7, 95 Gresham Street, London - EC2V 7NA, United Kingdom
- Phone: +44 203 866 3888
Conclusion
London offers a broad choice of fintech software development companies, from specialist teams focused on financial products to large engineering consultancies serving banks and investment organisations. The companies on this list cover digital banking, payments, lending, trading, wealth management, financial data and legacy modernisation, with different combinations of local presence and international delivery.
The right provider depends on the project's technical scope, financial domain and delivery requirements. Businesses should compare relevant portfolio experience, integration capabilities, security and compliance expertise, team location, and ongoing support before selecting a development partner. This helps narrow the 15 companies to those best aligned with the product's architecture, development stage and long-term needs.