Delivering the Backend Power Behind a Leading Mobile Retail Experience

We partnered with a leading sportswear and equipment brand to architect and deliver a high-performance Backend for Frontend (BFF) layer, ensuring their global e-commerce mobile app ran seamlessly. Our work focused on optimizing APIs, streamlining data flows, and diagnosing critical bugs helping the platform achieve a crash-free session rate of 99.98%, thousands of 5-star reviews, and a measurable boost in sales.

For a deeper dive into the architecture, technology choices, and key lessons learned, check out the detailed project page once you’ve finished this overview.

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The Problem It Solves

The client aimed to expand their global reach through a seamless mobile shopping experience, one that felt personal, fast, and engaging. While the mobile app itself was under active development, they needed a robust Backend for Frontend (BFF) layer to unify data from multiple services, deliver personalized product feeds, and ensure smooth checkout flows.


With a tight six-month delivery window, our challenge was to design and implement this backend architecture, integrate it with existing systems, and rigorously test and debug critical workflows, all while ensuring the broader development timeline remained on track.

Key Features

  • Backend for Frontend (BFF) Implementation using a NestJS GraphQL API to streamline data delivery for the mobile app.

  • Seamless E-Commerce Integrations connecting product listings, order management, and user profiles to existing systems.

  • Personalized Product Feeds served through dedicated backend services to enhance the shopping experience.

  • Redis-Powered Caching Layer for reduced backend load and significantly faster responses.

  • Real-Time Monitoring and Analytics with Amplitude and New Relic to track performance, monitor system health, and analyze user interactions.

  • Firebase Integration to support real-time features and push notifications.

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Impact / Results

  • 10% sales increase within months of launch.

  • Maintained an impressive average rating of 4.9 out of 5 stars across app stores shortly after release.

  • 99.98% crash-free sessions, ensuring a reliable user experience.

  • Global reach, launched in over 30 countries with localized features.

  • Foundation for growth, with architecture designed to scale with new features and future integrations.

  • Significant improvement in response times thanks to Redis caching, delivering a noticeably faster and smoother user experience.

  • Improved operational visibility through New Relic, enabling proactive detection and resolution of backend performance issues.

  • Enhanced decision-making with real-time insights from monitoring tools, ensuring continuous optimization of the platform.

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Curious about the backend that powers it all? Once you’ve reviewed this overview, visit the detailed case study for a deep dive into the architecture, integrations, and technical decisions that made this application fast, reliable, and scalable.

Need a robust, scalable backend to power your mobile or web application?

Let’s talk about how our team can architect and deliver a full-stack solution tailored to your business goals.

Contact us
August-Bebel-Str. 9, 72072, Tübingen.
+49 1638 119175