Banking software projects often combine customer-facing applications with payment infrastructure, security controls, compliance requirements, legacy systems, and third-party integrations. The companies below cover different parts of that work, from mobile banking and core system modernization to lending platforms, open banking, data engineering, and financial software maintenance.
1. Itexus
Itexus focuses heavily on software for banking, fintech, trading, investment, and wealth management businesses. Its banking capabilities cover mobile and online banking platforms, digital account opening, KYC workflows, lending, payments, wallets, card management, open banking integrations, fraud monitoring, and core banking modernization. The company also handles DevOps, cybersecurity, QA, product discovery, and ongoing software support.
This makes Itexus particularly relevant for financial organizations that need more than a standalone app. Its work extends into backend architecture, third-party financial integrations, regulated workflows, legacy modernization, and high-load systems.
Key Facts
- Best for: Banks and fintech companies building or modernizing complex financial platforms
- Core services: Banking software development, fintech development, mobile banking, integrations, legacy modernization
- Specialization: Regulated financial software and integration-heavy platforms
- Industries: Banking, fintech, payments, lending, trading, wealth management
- Location: United States headquarters with European development offices
- Notable strength: Experience across banking applications, financial integrations, security, and production support
Contact Information
- Website: itexus.com
- Email: info@itexus.com
- 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 software for businesses that need web, mobile, financial, CRM, cloud, and AI capabilities. Its finance offering covers tailored financial software rather than limiting clients to a fixed banking platform, giving the team room to work around existing processes and technical requirements.
For banking projects, OSKI is more relevant to organizations seeking custom engineering, modernization, integrations, or customer-facing applications than institutions looking for a prebuilt core banking product. Its broader software development service includes product design, engineering, deployment, ongoing operations, and maintenance.
Key Facts
- Best for: Custom financial applications and banking-related product development
- Core services: Custom software, mobile apps, financial software, cloud development, AI integrations
- Specialization: Custom business software and product engineering
- Technologies: React, Node.js, .NET, Flutter
- Notable strength: Covers development from product concept through deployment and ongoing maintenance
Contact Information
- Website: oski.site
- Email: contact@oski.site
- LinkedIn: www.linkedin.com/company/oski-solutions
- Address: Kaupmehe tn 7-120, Tallinn, 10114, Estonia
- Phone: +48571282759
3. A-listware
A-listware provides financial software development across banking, insurance, investment, cryptocurrency, and related BFSI areas. Its banking work includes modernization of existing banking applications as well as web, mobile, backend, UI/UX, testing, and post-launch maintenance.
The company can also provide dedicated engineering resources, making it relevant to financial organizations that already have internal technical leadership but need more delivery capacity. A-listware’s published finance portfolio includes classical banking projects and broader custom financial software development.
Key Facts
- Best for: Banks needing development teams or modernization support
- Core services: Financial software, web development, mobile development, testing, dedicated teams
- Specialization: BFSI software engineering and outsourced development
- Financial domains: Banking, payments, lending, investment, insurance
- Notable strength: Flexible development and team-extension models
Contact Information
- Website: a-listware.com
- Email: info@a-listware.com
- 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 and modernizes fintech web and mobile products, including financial applications, banking interfaces, wallets, trading applications, transaction workflows, identity verification, and operational dashboards. Its work can cover product discovery, UX/UI, mobile and backend development, QA, integrations, launch, and support.
The company is especially relevant when a financial application already exists but has performance, architecture, reliability, or maintenance problems. Gilzor also works on new fintech products and can extend internal teams with developers, QA specialists, and designers.
Key Facts
- Best for: Mobile banking, fintech apps, and modernization of existing products
- Core services: Mobile development, web development, backend engineering, integrations, QA
- Specialization: Transaction-heavy fintech products
- Locations: Warsaw and Limassol
- Notable strength: Combination of new product development and application modernization
Contact Information
- Website: www.gilzor.com
- Email: contacts@gilzor.com
- Address: Poland, Warsaw, Office 58, street Adama Mickiewicza 37, 01-625
- LinkedIn: www.linkedin.com/company/gilzor-softwaredevelopment
5. Mobian
Mobian is a European software development studio working across mobile, AI, fintech, healthcare, logistics, and other software-intensive industries. Its fintech development service is aimed at startups, SMBs, banks, and financial institutions, with development teams that can integrate into an existing technical organization or take responsibility for an outsourced project.
Mobian is most suitable for mobile-focused banking and fintech products rather than large core banking replacement programs. Its software delivery model includes dedicated engineering teams, application development, product scaling, and support for existing systems.
Key Facts
- Best for: Mobile banking and fintech applications
- Core services: Mobile development, AI development, dedicated engineering teams
- Specialization: Mobile and fintech product engineering
- Location: Registered in Estonia with engineers in Ukraine
- Delivery models: Outsourcing and outstaffing
Contact Information
- Website: mobian.studio
- Email: info@mobian.studio
- Address: Harju maakond, Tallinn, Kesklinna Linnaosa, Masina tn 22, 10113
- LinkedIn: www.linkedin.com/company/mobian-studio
6. Net-devs
Net-devs provides fintech software engineering for regulated, high-reliability systems. Its fintech work emphasizes auditability, security, uptime, payment and trading infrastructure, and development within compliance programs such as SOC 2, ISO 27001, and PCI. The company also handles legacy modernization, cloud-native development, dedicated engineering teams, and enterprise software projects.
For banking and financial technology projects, NetDevs is particularly relevant when software needs to integrate security and compliance requirements into the architecture from the beginning rather than treating them as post-development tasks.
Key Facts
- Best for: Regulated fintech and financial software projects
- Core services: Fintech engineering, enterprise software development, legacy modernization, dedicated teams
- Specialization: High-reliability and compliance-sensitive software
- Location: Warsaw, Poland
- Notable strength: Engineering focused on audit, security, reliability, and regulated environments
Contact Information
- Website: net-devs.com
- Email: contact@net-devs.com
- Phone: +48 571 282 759
- Address: Obrzeżna 1D, 02-691 Warsaw, Poland
- LinkedIn: www.linkedin.com/company/net-devs
7. SoftPro
SoftPro develops custom business software using .NET, ASP.NET Core, React, Azure, AWS, and related technologies. Its services cover custom software development, web applications, cloud systems, legacy modernization, AI integration, and ongoing technical support.
The company has also positioned its engineering services for fintech projects, including work involving product development, integrations, and platform modernization. For banking organizations, SoftPro is better considered for custom applications, portals, cloud modernization, and supporting systems than as a provider of an off-the-shelf core banking platform.
Key Facts
- Best for: Custom financial applications and modernization projects
- Core services: Custom software, web applications, cloud development, AI integration
- Technologies: .NET, ASP.NET Core, React, Azure, AWS
- Location: Warsaw, Poland
- Notable strength: Microsoft-stack development and modernization of existing business systems
Contact Information
- Website: soft-pro.pl
- Address: Poland, Warsaw Mazowieckie Voivodeship, 13 Erasmus Ciołka St. 401
8. 21Century Tech
21Century Tech is an AI-native software studio that develops production software with senior engineers supported by AI-assisted development workflows. Its capabilities include software architecture, business logic, code review, QA, security decisions, automated testing, documentation, CI/CD, third-party integrations, and legacy refactoring.
Key Facts
- Best for: Custom software, integrations, and legacy refactoring
- Core services: Full-stack product development, architecture, QA, CI/CD, integrations
- Delivery model: AI-assisted development led and reviewed by senior engineers
- Location: Miami, remote-first
- Notable strength: Senior-led engineering with AI-assisted development and human code review
Contact Information
- Website: 21century.tech
- Email: kirill@oski.site
Conclusion
The right banking software development company depends heavily on what needs to be built or improved. A bank replacing legacy infrastructure has very different requirements from a fintech launching a mobile banking product, while projects involving payments, lending, open banking, or fraud prevention bring their own technical and compliance demands.
The companies on this list cover a broad mix of banking software services, from core system modernization and complex integrations to mobile apps, cloud migration, data engineering, and dedicated development teams. Before choosing a partner, it makes sense to look closely at relevant banking experience, security practices, integration capabilities, and the team’s ability to support the product after launch.
For organizations looking for a development partner with a strong focus on fintech and banking software, Itexus is one option worth considering. Its experience spans digital banking, payments, lending, financial integrations, and modernization projects, making it suitable for both new product development and improvements to established financial systems.
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