Expanding a business banking platform for international growth
We partnered with a fintech company to advance its mobile banking experience and simplify core financial journeys for growing companies.

Client
A business banking platform built for entrepreneurs and growing companies. It brings together accounts, payments, cards, invoicing, accounting and expense management into one product, helping companies simplify financial operations while supporting growth across European markets.
Challenge
Expanding into new markets required technology that could scale with the business.
Scaling the platform
The product was growing quickly. The technical foundation needed to support more customers while enabling faster releases and continued product growth.
Financial clarity
Business owners rely on the platform to understand the state of their finances at any moment. The information presented needed to support confident decisions.
International growth
Expansion into new European markets introduced additional product requirements while maintaining a consistent experience remained essential.
Product simplicity
As the product became more capable, customers still needed to understand what to do next. Financial tasks had to feel intuitive from the first interaction.
Solution
- 01
Mobile platform scalability
Built a stronger mobile foundation to support growing customer demand, faster releases and continued product expansion.
- 02
Financial product experience
Designed and refined core financial experiences that helped customers understand their finances and complete everyday tasks with confidence.
- 03
European market adaptation
Expanded product functionality for new European markets while keeping the mobile experience coherent and easy to maintain.
Result
Business value translated into measurable results.
- 29%Business accounts opened
- 3New European markets
- 24%More monthly active users
- 37%Payment volume growth
Technologies used
Core technologies selected to support the product architecture.
React
TypeScript
Swift
Kotlin
.NET
Python
SQL Server
Azure
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Get in touchWhy Mountalis
Product Thinking First
We challenge assumptions early and help shape key decisions before engineering begins.
Senior Ownership
Senior engineers stay directly involved in product decisions, architecture and delivery.
Built for Regulated Markets
We design systems with security, auditability and compliance considered from the start.
Aligned Execution
We keep strategy, engineering and business priorities aligned across the lifecycle.
Validation Before Scale
We reduce unnecessary scope early so new initiatives reach validation with less operational overhead.
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