Performance Engineering for a Banking App with Over 500,000 Users

The Challenge

Qik, a leading regional digital bank with over 500,000 users, needed to improve its mobile app experience. Although the platform was constantly evolving, typical signs of a growing application began to appear: inconsistent response times, high resource consumption, and friction in some critical user flows.

At the same time, the development team had to continue delivering new features and business capabilities, making it difficult to dedicate time and specialized resources to deep optimization and performance initiatives.

Our Approach

We applied our Performance Engineering framework, a two-stage methodology designed to maximize the performance of digital applications without compromising product evolution.

The first stage consisted of a Performance Assessment, where we analyzed the real-world behavior of the application, identifying bottlenecks, resource consumption patterns, and improvement opportunities prioritized by technical impact and user experience.

Working closely with the client's teams, we generated a roadmap with over 25 concrete optimization opportunities, backed by metrics and evidence obtained through profiling and observability tools.

From Findings to Execution

With a clear roadmap, we began a second Optimization stage focused on implementing the improvements identified during the assessment.

The work allowed us to address structural problems that are typically difficult to detect without a formal performance analysis process. Throughout the project, Kranio acted as a specialized performance cell, allowing internal teams to maintain their focus on developing new features while optimization initiatives progressed in parallel.

Results

The implemented improvements significantly accelerated user interaction with the application, achieving a nearly 92% reduction in perceived response times in critical flows. Additionally, a smoother experience, lower resource consumption, and a platform better prepared to continue growing without degrading the digital experience were achieved.

Impact

Beyond the technical metrics, the project delivered a faster, more stable, and consistent mobile experience for hundreds of thousands of users. Likewise, the organization incorporated a replicable methodology for future performance initiatives, along with a stronger technological foundation to continue scaling its digital product without sacrificing innovation speed.