End-to-End FinTech Platform Development and Modernization

The Story

The client partnered with FiftyFive Technologies to modernize their investment platform, aiming to improve user experience, strengthen system performance, and accelerate feature deployment. The engagement involved enhancing the web application, integrating backend services, and implementing QA automation to ensure high availability and compliance. A dedicated FiftyFive team worked alongside the client’s internal tech lead under an agile delivery model to execute full-cycle development and testing.

The client is a Swedish FinTech company providing secure, high-performance digital investment solutions for Private Banking, Wealth Advisory, and Asset Management across the Nordic financial ecosystem.

Abhay

Head of Mobile Development

The challenge

• > Legacy codebase requiring reverse-engineering and documentation restructuring.

• > Complex backend built on PHP, Node.js, TypeScript, Python, and MariaDB with SOAP APIs hosted on Google Cloud.

• > Inconsistent frontend architecture using React, Redux, and Webpack.

• > Gaps in integration between CRM and investment management modules.

• > Missing services for user notifications and NordNet brokerage linking.

• > Limited QA coverage and undefined validation workflows.

The solution

• > Refactored backend logic for modularity, scalability, and efficient API communication.

• > Enhanced frontend with React and Redux for dynamic data rendering and localization.

• > Developed and deployed Notification Service and NordNet Linking Service to streamline communication and brokerage synchronization.

• > Integrated CRM with COB system for unified client data management.

• > Implemented automated QA test cycles covering regression, validation, and performance.

• > Configured third-party tools for seamless local integration and updated technical documentation for long-term maintainability.

The outcome

The upgraded platform achieved faster response times, improved data synchronization, and 99.9% system uptime. User onboarding speed increased by 35%, and post-launch defect rates dropped by 40%. The collaboration enhanced operational efficiency, reduced maintenance overhead, and enabled faster rollout of new financial products—strengthening client trust and end-user satisfaction. The project reflects FiftyFive’s expertise in delivering scalable, secure, and compliant FinTech software solutions through dedicated development and QA teams.

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