FinTech Software Development
We design, build, and launch custom fintech software. From core systems to customer-facing apps - we turn your financial ideas into working technology.
Start your projectWhat We Offer in terms of FinTech Software Development
End-to-end fintech product development
We handle everything - from architecture to deployment - with full ownership and transparency.
Backend & API engineering
We build scalable, secure, and integration-ready APIs for payments, KYC, lending, wallets, and more.
Frontend & mobile apps
We create modern user interfaces for B2B and B2C use - responsive, fast, and compliant.
Integration with fintech ecosystems
We connect your software with PSPs, banks, regtech tools, and external services to make it all work together.
How We Work?
Product scoping
We align on the idea, business goals, and target users. Together, we define what to build — and why it matters.
Technical planning
We design the architecture, choose the right stack, and outline all core integrations. Every decision is aligned with scalability and compliance.
Development & testing
Our team delivers the software in short cycles, with full QA and review at every step. You stay involved throughout the process.
Launch & scale
We support deployment, track performance, and prepare your platform for scale. Post-launch, we offer ongoing development and optimization.
Trusted by Leading Companies
Custom-built fintech software - without the guesswork
Whether you're building a neobank, wallet, lending app or embedded finance solution - we know what it takes. Our developers, architects, and consultants work as one team to make sure your product is secure, user-friendly, and ready for market. No shortcuts, no bloat - just the features you really need.
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We speak finance, code, and compliance
Our strength lies in combining software expertise with fintech domain knowledge. We understand AML, PSD2, open banking, and KYC/KYB standards - and we bake that into the software from day one. You get a solution that works not just technically, but also legally and commercially.
What Our Clients Say
The z3x team provided comprehensive support throughout the design and development process of our new mobile application - from the initial concept, through product strategy development, to the final implementation. The collaboration covered both the technological and business aspects, with every stage carried out with great attention to detail and quality. The team demonstrated an excellent understanding of our needs, high flexibility, and the ability to efficiently address emerging challenges. The implementation of payments was just one of many well-executed components in this complex project.
Piotr Pszczolkowski
CEO
Working with the z3x team on auditing our processes proved to be very valuable. We received a detailed analysis of existing solutions, reliable research, and specific recommendations for changes and improvements. The team demonstrated extensive knowledge of the industry and the ability to combine business and technological perspectives. The entire process ran smoothly, and the materials prepared provided a solid basis for further optimization activities.
Piotr Birski
Chief Product Officer
The z3x team demonstrated a high level of professionalism and an excellent understanding of the specifics of the FinTech and e-commerce market. The audit, detailed analysis of the competitive environment, and local customer expectations provided us with valuable data that really supported the decision-making process and planning for the launch of new services. We appreciate the strategic approach, timeliness, and quality of the materials prepared. The cooperation went smoothly and fully met our expectations.
Sebastian Ramatowski
Head Indirect Sales Poland
More services we provide
Our expertise around FinTech Software Development
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