Empowering Bigbank’s Mobile Future: From Vision to Launch in Just Four Months
Client
Bigbank AS
Sector
Banking
Solution
Mobile App Development
Deliverables
Cross-platform iOS and Android apps
Flutter
Accessibility: WCAG 2.0 AA standard
Security: OWASP MAS best practices
X-Pay integration
QES and biometric login
Bigbank AS is a Baltic-headquartered financial institution offering loans, deposits, and other banking services to private and business customers across multiple European markets. With operations in Estonia, Latvia, Lithuania, Finland, Bulgaria, and Sweden, Bigbank serves a diverse customer base and is focused on delivering modern, user-friendly financial services.
Our contribution
Mooncascade partnered with Bigbank to design and develop their first mobile banking app, set to launch in 2025. Built with Flutter for a cross-platform iOS and Android experience, the solution provided faster time-to-market and cost efficiency compared to native development. Accessibility (WCAG 2.0 AA standard) and security (following OWASP MAS best practices) were central design principles. The project was delivered by a combined team from both sides, working in close daily collaboration. The partnership felt like one unified team, with great synergy, mutual understanding, and shared ownership of the goal. This close cooperation ensured smooth communication, quick decision-making, and alignment throughout the development process.
The MVP was successfully launched within 4 months, marking a key step in Bigbank’s growth into a full retail bank and enabling them to offer a modern, app-based experience to their customers.
Partnership value to the customer
By leveraging Mooncascade’s 15+ years of fintech experience and proven agile delivery approach, Bigbank accelerated its mobile strategy without the delay of building an internal team first. The joint effort not only ensured the timely delivery of the MVP but also laid a strong foundation for future expansion and the establishment of Bigbank’s own in-house mobile capabilities.
We truly appreciated working with such an agile and experienced team. Their iterative approach helped us manage complexity and deliver on time, while keeping the focus on what mattered most: creating real value for our customers. This partnership gave us the confidence and foundation to take the next step in Bigbank’s mobile journey.
Targo Raus, Head of Daily Banking Area
Learn more about Bigbank
