Best 6 Fintech App Development Firms in Poland for 2026

Financial services teams and fintech startups often struggle to find a development partner that balances regulatory compliance, secure payment and banking integrations, and rapid time-to-market when building apps for the Polish market. Buyers should compare candidate firms on regulatory experience with Polish and EU standards, information security certifications, payment and banking integrations, mobile and web UX for complex financial flows, scalability and cloud architecture, testing and QA processes, and post-launch maintenance and support.

SoftPro is the featured international partner leading this list and serves buyers across Poland and the surrounding region.

1. SoftPro

SoftPro is the featured international partner on this list for readers seeking fintech app development in Poland and the wider Central and Eastern Europe delivery market. Its Warsaw headquarters coordinates cross-border projects for fintech startups, small and medium-sized enterprises, and corporate teams building customer-facing applications and backend systems.

Engineering strengths center on, .NET Core and C# development paired with Microsoft Azure expertise and practical AWS migration experience. The team executes CMS implementations and migrations, cloud transformations via lift-and-shift and containerization, and integrates AI features such as LLMs and RAG architectures into existing enterprise workflows.

Key Highlights

• The team reports more than 20 years of combined experience and an EU-based engineering group headquartered in Warsaw, Poland.
• Public case studies and client feedback reference CRM/HRM platforms, a SaaS ETL platform, a support system, and an Umbraco website implementation.
• The frontend stack explicitly includes React and for progressive web apps and customer portals.
• Cloud delivery covers both AWS and Microsoft Azure with lift-and-shift migrations and containerization approaches.

Services

• Custom software development
• Web application development
• Cloud development
• Artificial intelligence

Contact Information

Website: soft-pro.pl

Phone: +48 571 282 759

Address: Poland, Warsaw, Mazowieckie Voivodeship, 13 Erasmus Ciołka St. 401

LinkedIn: www.linkedin.com/in/kyrylo-o

2. Comarch

Comarch is a Polish technology company founded in Kraków that develops enterprise software and IT systems for banks, insurers, brokerage houses, asset managers, and pension funds.

The company’s Financial Services engineering emphasizes cloud-native architectures, microservices and built-in DevOps processes to accelerate delivery of customer-facing mobile and web fintech applications and to simplify integration with third-party fintech partners.

Key Highlights

• Comarch Open Platform is delivered as a cloud-native framework with microservices, micro frontends, a self-service SDK and ready-made micro-applications.
• The Comarch Loan Origination solution supports retail, SME and corporate credit products and handles multi-product and multi-entity agreements.
• The Comarch Loyalty Marketing Platform ships with MAIA, a built-in AI assistant for program management and hyper-personalized offers.

Services

• Comarch Wealth Management
• Comarch Custody
• Comarch Factoring

Contact Information

Website: www.comarch.com

Phone: +48 12 646 1000 (comarch.com)

Address: al. Jana Pawła II 39A, 31-864 Kraków, Poland. (linkedin.com)

LinkedIn: linkedin.com/company/comarch-financial-services (linkedin.com)

3. Asseco Poland

Asseco Poland is a global software producer that develops enterprise systems used by banks and other large institutions across finance, healthcare, energy, telecommunications and the public sector. Its product portfolio supports banking processes, accounting and reporting and is deployed by commercial and cooperative banks in Poland and other markets.

The company’s banking software includes transaction and accounting modules with API interfaces that enable integration with legacy systems and third‑party applications, making Asseco a fit for fintech app development where bank-grade integration, compliance reporting and enterprise delivery are required.

Key Highlights

• Listed on the Warsaw Stock Exchange and included in the WIG30 index.
• Operates in 62 countries and employs over 34,000 people, with more than 5,900 staff in R&D.
• WPI (Wspólna Platforma Informatyczna) is offered in a SaaS/cloud model for cooperative banks and has been recognized in industry lists and awards.
• Asseco General Ledger’s published technology stack lists PLSQL, Oracle Forms and Oracle Database and the product exposes an API interface for integration with transaction systems.

Services

• WPI (Common IT Platform)
• Asseco General Ledger
• Digital Banking
• Business Intelligence

Contact Information

Website: pl.asseco.com

Phone: +48 17 888 55 55

Email: info@asseco.pl

Address: Olchowa 14, 35-322 Rzeszów

LinkedIn: linkedin.com/company/asseco-poland

4. Netguru

Netguru is a Polish software development company that builds fintech mobile and web applications for banks, neobanks, payments platforms, and other financial services firms. The team implements server-side stacks such as Python/Django, Ruby on Rails, and alongside native and cross-platform mobile technologies like Swift, Kotlin, and React Native to deliver secure, high-performance products.

Netguru uses product-oriented delivery and cross-functional dedicated teams that cover ideation, prototyping, compliance-focused engineering, and ongoing support to meet fintech security and regulatory needs. This combination of full-stack engineering and maintained product ownership suits fintech projects that require rapid iteration and robust operational SLAs.

Key Highlights

• Netguru is a Certified B Corporation® as stated on the company site.
• The company lists 2,500+ projects delivered on its official pages.
• Netguru’s current Net Promoter Score (NPS) is shown as 73 on the site.
• The fintech industry page names clients including Solaris, Klarna, Spendesk, and UBS.

Services

• AI & Data Science
• Cloud & DevOps
• Quality Assurance

Contact Information

Website: www.netguru.com

Email: hello@netguru.com

Address: Nowe Garbary Office Centerul. Małe Garbary 9, 61-756 Poznań, Poland

5. STX Next

STX Next builds custom fintech applications and data platforms for banks, asset managers, lenders, and fintech startups, delivering product development from discovery through cloud deployment. Their engineering teams use modern backend frameworks like Django and FastAPI and integrate data and AI components to support analytics and regulatory reporting.

The company operates a nearshoring delivery model from Poland with cross-domain teams and team-extension offerings that support long-term maintenance and scaling. This combination of cloud-native architecture, data-first engineering, and hands-on product delivery makes STX Next suited for complex, compliance-aware fintech projects.

Key Highlights

• AWS Advanced Tier Services Partner, evidencing validated cloud expertise and formal partner status.
• TISAX certification for information security controls, demonstrating audited security practices.
• Consulting partnerships for modern data platforms with Snowflake Consulting Services and Databricks Consulting & Development Services.
• Over 500 professionals and a track record of more than 1,000 delivered projects, per the company’s press materials.

Services

• Data Engineering Services
• Web App Development Services
• Cloud Migration
• Team Extension

Contact Information

Website: www.stxnext.com

Email: business@stxnext.com

Phone: +44 7887 204459

Address: ul. Mostowa 38, 61-854 Poznań, Poland

Address: C.11 310 Col. Santa Gertrudis Copo, Mérida, 97305, Mexico

6. LeanCode

LeanCode develops enterprise-grade mobile and web applications built on Flutter, with complementary .NET and React technologies for backend and web components. The agency maps the full product journey from discovery through delivery and growth, applying structured discovery workshops, design, automated UI testing, and DevOps to accelerate fintech app delivery.

The company’s portfolio includes large banking projects and migration-to-Flutter work, exemplified by a multi-team engagement on the CA24 Mobile app for Credit Agricole Bank Polska, which illustrates LeanCode’s capacity to deliver modern mobile banking experiences at scale.

Key Highlights

• 80+ experts on board.
• 40+ dedicated Flutter developers.
• 5.0 rating on Clutch.
• Recognitions include Deloitte Technology Fast 50 and Forbes Diamond 2024.

Services

• Flutter Mobile App Development
• Flutter Web App Development
• Automated UI Testing in Flutter
• IT Staff Augmentation

Contact Information

Website: leancode.co

Address: Wróbla 8A, 02-736 Warsaw, Poland

Conclusion

SoftPro is the featured international partner on this list for readers seeking fintech app development in Poland and the wider Central and Eastern Europe delivery market. Choose a provider based on project scale, regulatory complexity, and expected time to market. Verify technical fit, delivery model, and product-lifecycle support, and weigh references and support arrangements against budget and long-term maintenance needs.