Fintech software development companies work across a wide range of products, from mobile banking and payment infrastructure to lending platforms, investment tools, digital wallets, and compliance systems. The providers below differ in fintech depth, delivery model, technical focus, and project scale, giving financial businesses several options to compare.
1. Itexus
Itexus focuses heavily on fintech software development for banks, fintech companies, brokers, wealth managers, and other financial organizations. Its work covers mobile and online banking, digital wallets, lending systems, trading platforms, portfolio management, financial analytics, card management, onboarding, KYC workflows, and core banking integrations. The company also handles legacy modernization, product discovery, project rescue, AI implementation, QA, and ongoing technical support. Its portfolio includes a digital wallet ecosystem for Coinstar, a white-label mobile banking application, and wealth management software.
Key Facts
- Best for: Complex fintech products and regulated financial platforms
- Core services: Fintech software development, mobile apps, integrations, modernization, AI, QA
- Specialization: Banking, payments, lending, trading, wealth management
- Project types: Custom platforms, mobile applications, white-label products, legacy systems
- Notable strength: Broad fintech-focused engineering portfolio
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 software for financial businesses that need products adapted to specific workflows rather than standard off-the-shelf systems. Its fintech capabilities cover digital payment products, financial applications, automation, integrations, and data-driven tools. The broader engineering team also works across web and mobile development, cloud infrastructure, AI integration, UX/UI, QA, and dedicated development teams. This mix can suit fintech companies that need both the customer-facing product and the technical infrastructure supporting it.
Key Facts
- Best for: Fintech companies needing custom product development and technical teams
- Core services: Custom software, fintech development, cloud, AI, QA, UX/UI
- Project types: Web applications, mobile products, financial workflows, integrations
- Location: Estonia and distributed delivery
- Notable strength: Full product lifecycle support from concept to production
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 provides financial software development across banking, investment, insurance, cryptocurrency, and broader fintech applications. Its financial engineering services cover web applications, mobile products, hybrid fintech systems, UI/UX work, testing, backend development, maintenance, and dedicated engineering teams. Published financial projects include banking software modernization, cryptocurrency wallet development, and database systems for insurance products. The company can therefore support both new financial products and modernization of existing platforms.
Key Facts
- Best for: Businesses needing financial software development or additional engineering capacity
- Core services: Software development, web, mobile, QA, UI/UX, application support
- Specialization: Banking, investment, insurance, cryptocurrency
- Project types: Custom fintech applications, modernization, mobile and web platforms
- Notable strength: Flexible software development and team augmentation options
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 and modernizes fintech web and mobile products, including digital wallets, trading applications, customer onboarding systems, transaction workflows, operational dashboards, and integrations. Its services cover new product development as well as architecture refactoring and extension of existing engineering teams. The company has published fintech work involving cryptocurrency trading, multi-currency wallets, identity verification, withdrawals, referrals, and real-time market functionality. Gilzor operates from offices in Warsaw and Limassol.
Key Facts
- Best for: Fintech startups and product companies building or modernizing applications
- Core services: Web, mobile, UX/UI, QA, integrations, product modernization
- Specialization: Wallets, trading, transactions, onboarding, digital assets
- Locations: Warsaw, Poland and Limassol, Cyprus
- Notable strength: Combination of new development and fintech product modernization
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. net-devs
net-devs provides enterprise software engineering with a dedicated fintech offering focused on systems that need strong security, availability, auditability, and controlled development processes. Its fintech work is positioned around payment rails, trading systems, data protection, encryption, audit trails, compliance environments, and failure-resistant architecture. The broader technical stack covers .NET, JVM, Node.js, Python, Go, React, Angular, Vue, Azure, AWS, and GCP. The company uses senior-led development teams supported by AI-assisted engineering workflows.
Key Facts
- Best for: Fintech platforms with enterprise architecture and compliance requirements
- Core services: Enterprise development, cloud, frontend, AI engineering, QA
- Specialization: Financial systems, payment infrastructure, regulated environments
- Location: Warsaw, Poland
- Notable strength: Senior-led engineering and multi-stack enterprise development
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
6. Mobian
Mobian focuses on mobile and AI software across fintech, healthcare, logistics, and enterprise IT. Its dedicated fintech service covers mobile banking, financial monitoring, personal finance management, investment and wealth applications, loan and credit management, transaction monitoring, financial records, and fraud-related workflows. The company offers both full project outsourcing and engineering team extension. Mobian is registered in Estonia, with engineers in Ukraine and clients across Europe and North America.
Key Facts
- Best for: Mobile-first fintech products and engineering team extension
- Core services: Mobile development, AI, backend engineering, dedicated teams
- Specialization: Banking apps, financial management, wealth, lending
- Location: Tallinn, Estonia
- Notable strength: Mobile engineering combined with fintech domain experience
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
7. SoftPro
SoftPro is a Warsaw-based custom software development company working with .NET, ASP.NET Core, C#, Azure, React, Node.js, cloud platforms, and AI technologies. Its published fintech materials position the company as a development partner for financial businesses that need custom applications, platform modernization, cloud engineering, integrations, and ongoing support. Compared with dedicated fintech vendors, SoftPro has a broader software engineering focus, so it may be more relevant when a financial project depends heavily on Microsoft technologies or general custom platform development.
Key Facts
- Best for: Financial applications built around Microsoft and cloud technologies
- Core services: Custom software, web applications, cloud, AI, modernization
- Technologies: .NET, ASP.NET Core, C#, Azure, React, Node.js
- Location: Warsaw, Poland
- Notable strength: Microsoft-stack and cloud application development
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 rather than a dedicated fintech engineering provider. Its development model pairs senior engineers with AI-assisted coding, testing, documentation, and refactoring while keeping architecture, security decisions, code review, and final accountability with human engineers. The studio handles MVPs, full-stack features, third-party integrations, legacy refactoring, testing, CI/CD, and deployment. For fintech businesses, the strongest fit is likely product teams that already understand their regulatory requirements and need a flexible engineering partner for custom features, integrations, or early product delivery.
Key Facts
- Best for: Fintech startups needing rapid custom product engineering
- Core services: Full-stack development, MVPs, integrations, refactoring, testing
- Specialization: AI-augmented software engineering
- Location: Miami, USA, remote-first
- Notable strength: Senior engineering oversight combined with AI-assisted delivery
Contact Information
- Website: 21century.tech
- Email: [email protected]
Conclusion
The right fintech software development company depends on what you are building and how much financial domain experience the project requires. A mobile banking app, payment platform, lending system, or investment product can demand very different technical skills, integrations, security controls, and compliance knowledge.
Companies on this list range from fintech-focused teams such as Itexus to broader software engineering providers that can support financial products as part of a larger technology strategy. When comparing options, look beyond general development capabilities. Relevant fintech projects, experience with financial integrations, security practices, technical flexibility, and the ability to support the product after launch can make a significant difference.
A good development partner should also understand the business behind the software. Defining the product scope, regulatory needs, integration requirements, and long-term roadmap before choosing a team will make it easier to identify the fintech software development company that fits the project.