Fintech software development companies work across a demanding mix of financial workflows, integrations, security requirements, data processing, and regulatory constraints. The providers below cover different areas of financial technology, including digital banking, payments, lending, investment management, trading, wallets, and modernization of existing financial platforms.
1. Itexus
Itexus focuses on software engineering for financial services, with experience across banking, trading, wealth management, lending, payments, and investment technology. Its development scope includes mobile and online banking platforms, digital wallets, trading interfaces, portfolio dashboards, automated underwriting, fraud monitoring, and core banking integrations.
The company also handles product discovery, architecture, legacy modernization, project rescue, UI/UX, DevOps, QA automation, and ongoing support. This broad lifecycle coverage is particularly relevant for financial organizations managing regulated products with complex integrations or high transaction volumes. Itexus reports more than 300 fintech projects delivered for over 250 clients across 23 countries.
Key Facts
- Best for: Complex and regulated fintech platforms
- Core services: Fintech software development, custom fintech development, mobile and web apps, AI, DevOps, QA, modernization
- Specialization: Banking, trading, wealth management, payments, lending
- Delivery: Product discovery through production support
- Geographic coverage: North America, Europe, UK, MENA, and other international markets
Contact Information
- Website: itexus.com
- Email: [email protected]
- Address: 8, The Green, STE road, Dover, DE 19901
- Facebook: www.facebook.com/itexus
- Instagram: www.instagram.com/itexus.soft
- LinkedIn: www.linkedin.com/company/itexus-fintech-software
- Twitter: x.com/ItexusSoft
2. OSKI Solutions
OSKI Solutions develops custom financial software for banking, payments, lending, insurance, and wealth management use cases. Its approach centers on adapting software to existing financial workflows rather than requiring organizations to reshape processes around a standard platform.
Relevant capabilities include payment-related platforms, loan management systems, investment and asset management software, budgeting applications, financial reporting tools, system integrations, and workflow automation. OSKI also provides broader custom engineering across cloud infrastructure, web and mobile development, AI, analytics, QA, and DevOps, which can be useful when a fintech project spans more than one technical layer.
Key Facts
- Best for: Custom financial systems built around specific workflows
- Core services: Fintech development, integrations, web and mobile development, cloud, AI
- Specialization: Banking, payments, lending, insurance, wealth management
- Technologies: .NET, React, Node.js, Python, Azure, AWS
- Location: Tallinn, Estonia
Contact Information
- Website: oski.site
- Email: [email protected]
- LinkedIn: www.linkedin.com/company/oski-solutions
- Address: Kaupmehe tn 7-120, Tallinn, 10114, Estonia
- Phone: +48571282759
3. A-Listware
A-Listware combines software development outsourcing with dedicated engineering teams for fintech, banking, payments, lending, investment, and insurance businesses. Its service portfolio covers custom software, application development, modernization, cloud development, mobile apps, testing, cybersecurity, data analytics, and infrastructure support.
The company can therefore fit fintech organizations that already own the product roadmap but need additional development capacity, as well as teams outsourcing larger parts of implementation. Its technical coverage includes .NET, Java, Python, Node.js, React, Angular, mobile technologies, major cloud platforms, databases, machine learning, and DevOps tooling.
Key Facts
- Best for: Fintech engineering team extension
- Core services: Custom development, team augmentation, QA, cloud, cybersecurity
- Industries: Fintech, banking, payments, lending, investment, insurance
- Engagement model: Outsourcing and dedicated development teams
- Technical coverage: Web, mobile, cloud, data, AI, DevOps
Contact Information
- Website: a-listware.com
- Email: [email protected]
- Phone: +44 (0)142 439 01 40
- Address: St. Leonards-On-Sea, TN37 7TA, UK
- Facebook: www.facebook.com/alistware
- LinkedIn: www.linkedin.com/company/a-listware
4. Gilzor
Gilzor develops web and mobile software for fintech companies, with work covering customer-facing financial applications and the backend systems that support them. Its fintech offering addresses transaction-heavy software, identity verification, wallets, transfers, trading functionality, application modernization, and integration with existing financial infrastructure.
One published fintech project involved a cryptocurrency exchange application with real-time trading, a multi-currency wallet, withdrawals, wallet-to-wallet transfers, and Sumsub identity verification. Gilzor also supports product validation, business analysis, UX/UI design, engineering, testing, and post-launch maintenance, giving clients a single team across most of the product lifecycle.
Key Facts
- Best for: Web and mobile fintech products
- Core services: Product development, UX/UI, engineering, QA, support
- Specialization: Trading, wallets, transfers, financial integrations
- Locations: Warsaw and Limassol
- Project model: Full-cycle software delivery
Contact Information
- Website: www.gilzor.com
- Email: [email protected]
- Address: Poland, Warsaw, Office 58, street Adama Mickiewicza 37, 01-625
- LinkedIn: www.linkedin.com/company/gilzor-softwaredevelopment
5. Mobian
Mobian focuses on mobile and AI development and lists fintech among its core industry areas. For financial companies, the team develops mobile products for iOS and Android, including applications supporting financial management, lending and credit workflows, and customer-facing digital services.
Its delivery models include both outsourcing, where Mobian manages implementation, and outstaffing, where engineers join an existing product team. This makes the company particularly relevant to fintech businesses where mobile is the primary customer channel or where an internal engineering group needs additional mobile expertise rather than complete product outsourcing.
Key Facts
- Best for: Mobile-first fintech products
- Core services: Mobile development, software engineering, dedicated teams
- Specialization: iOS and Android financial applications
- Industries: Fintech, healthcare, IT, logistics
- Engagement models: Outsourcing and outstaffing
Contact Information
- Website: mobian.studio
- Email: [email protected]
- Address: Harju maakond, Tallinn, Kesklinna Linnaosa, Masina tn 22, 10113
- LinkedIn: www.linkedin.com/company/mobian-studio
6. SoftPro
SoftPro develops custom software, web applications, cloud systems, and AI solutions using technologies including .NET, ASP.NET Core, React, Azure, and AWS. The company has also positioned its development teams for fintech projects involving payment platforms, financial services divisions, integrations, and platform modernization.
Its offering is broader than that of fintech-only firms, which can be useful when financial functionality is part of a larger business platform. Services cover greenfield software development, legacy modernization, cloud-native applications, customer portals, internal tools, AI integration, and ongoing maintenance.
Key Facts
- Best for: Microsoft-stack fintech and business software
- Core services: Software development, web apps, cloud, AI
- Technologies: .NET, ASP.NET Core, React, Azure, AWS
- Engagement: New development and modernization
- Location: Warsaw, Poland
Contact Information
- Website: soft-pro.pl
- Address: Poland, Warsaw Mazowieckie Voivodeship, 13 Erasmus Ciołka St. 401
7. Net-devs
Net-devs provides senior-led software engineering for fintech companies working with regulated, security-sensitive systems. Its fintech practice covers software designed around auditability, reliability, data security, and compliance requirements. The company also handles enterprise development, AI engineering, cloud infrastructure, platform engineering, modern front-end development, and legacy modernization.
For fintech projects, NetDevs places particular emphasis on audit trails, access controls, encryption, data residency, fault recovery, and reliable transaction processing. Its broader engineering stack includes .NET, JVM technologies, Node.js, Python, Go, React, Angular, Vue, Azure, AWS, and GCP.
Key Facts
- Best for: Regulated fintech and financial software
- Core services: Fintech engineering, enterprise development, cloud, AI, platform engineering
- Technologies: .NET, JVM, Node.js, Python, Go, React, Angular, Vue
- Cloud platforms: Azure, AWS, GCP
- Location: Warsaw, Poland
Contact Information
- Website: net-devs.com
- Email: [email protected]
- Phone: +48 571 282 759
- Address: Obrzeżna 1D, 02-691 Warsaw, Poland
- LinkedIn: www.linkedin.com/company/net-devs
8. 21century.tech
21century.tech is an AI-native software development studio built around senior-led engineering and AI-assisted delivery. Its services cover MVP development, full-stack features, third-party integrations, legacy refactoring, testing, documentation, CI/CD, and deployment.
For fintech product teams, this model can suit projects that need custom applications, backend functionality, integrations, or rapid product iteration. Senior engineers remain responsible for architecture, business logic, security decisions, and code review, while AI is used for implementation tasks such as code generation, testing, documentation, and refactoring.
Key Facts
- Best for: Fintech startups and product teams needing custom development
- Core services: Custom software, MVP development, integrations, refactoring
- Development model: AI-assisted engineering with human review
- Project types: Full-stack products, features, integrations, modernization
- Location: Miami, USA, with remote-first delivery
Contact Information
- Website: 21century.tech
- Email: [email protected]
Conclusion
The right fintech development partner depends on what is being built and how complex the financial workflows are. A digital banking platform, payment system, lending product, or investment application can require very different expertise, especially when integrations, security, compliance, and scalability come into play.
The companies on this list cover a broad range of needs, from full-cycle product development to dedicated engineering teams, mobile fintech apps, legacy modernization, and specialized financial infrastructure. Before choosing a provider, compare relevant fintech experience, technical capabilities, delivery model, and experience with the regulatory requirements that apply to your product.
A strong fit is ultimately the company that understands both the technology and the financial processes behind it, and can support the product as those requirements change.