Introduction
Zizzi Denmark ApS, a modern Scandinavian fashion retailer known for stylish plus-size collections and contemporary apparel, places its e-commerce platform at the center of the customer experience.
For a style-conscious audience, effortless navigation, fast page loads, and a smooth shopping journey are essential — not optional. The digital storefront must reflect the same attention to fit, quality, and modern design that defines the brand’s physical and product experience.
To meet these expectations, Zizzi partnered with Speed Kit to optimize the performance of its online shop. By accelerating page delivery and enhancing browsing responsiveness, Speed Kit helps create a seamless digital experience that mirrors the brand’s commitment to comfort, confidence, and contemporary Scandinavian style — ensuring customers can explore and shop with ease from the very first click.
"Delivering a refined, high-performance digital experience is essential for Zizzi — especially as our online store serves as a primary touchpoint for our international community of customers.
With Speed Kit, we achieved a measurable improvement in storefront performance while keeping technical complexity low. The integration process was seamless, and the collaboration with the Speed Kit team was professional, efficient, and clearly focused on delivering tangible results that enhance the user experience."
Challenge
Solution
Zizzi already operates a high-performance storefront built on Salesforce Commerce Cloud, providing a modern and scalable e-commerce experience for its international customers. To further enhance performance and browsing efficiency, Speed Kit was integrated as an additional optimization layer.
By intelligently caching content and preloading the most relevant next steps in the customer journey, Speed Kit helps deliver faster page transitions and a smoother shopping experience across devices and markets. This results in measurable improvements in core performance metrics and user experience, complementing the already robust capabilities of the Salesforce Commerce Cloud platform and reinforcing Zizzi’s commitment to a seamless digital shopping experience.
Speed Kit is an official ACE eligible technology partner and independent software vendor (advanced tier) of the AWS Competency Partner Program "Accelerate" as well as the Workload Migration Program. Our technology is powered by 13 different AWS services:
- Elastic Kubernetes Service (EKS): We use EKS to schedule and orchestrate our Speed Kit applications on EC2 instances.
- Simple Storage Service (S3): Speed Kit stores cached assets in S3 buckets. Additionally, we store RUM (Real User Monitoring) and PI (Performance Insights) data in S3 buckets for analytics purposes.
- Elastic Compute Cloud (EC2): Our workloads are hosted on EC2 instances, as managed through EKS.
- Kinesis Data Streams: Kinesis Data Streams are used to ingest RUM and PI data from Speed Kit, which is then consumed by Amazon Managed Service for Apache Flink. Fastly also streams access logs to our Kinesis Data Stream, which are similarly consumed by Amazon Managed Service for Apache Flink.
- Athena: We use Amazon Athena to query data stored in AWS S3 buckets, enabling performance insights and asset preloading.
- Elastic Container Registry (ECR): Docker images are stored in ECR and deployed in our Kubernetes cluster, which is managed by EKS. For third-party application images, we use the pull-through-cache feature of ECR.
- Elastic Container Service (ECS): We build Docker images using a service hosted on Amazon ECS.
- Route 53: Route53 is used to manage DNS records.
- Simple Email Service (SES): We use SES is used for sending transactional emails.
- Managed Streaming for Apache Kafka (MSK): We use MSK to facilitate consuming and producing custom event records for different applications.
- DynamoDB: Speed Kit uses DynamoDB to store information related to our predictive preload feature.
- Lambda: We use Lambda to pre-render client side renderd pages to make that actual server side rendered.
- ElastiCache (Redis OSS): We use ElastiCache to store our Bloom filter, which checks whether an asset is present in our cache.
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Click the image to open the architectual diagram of Speed Kit with AWS
Results
Business Uplift
Our proof of concept with Zizzi was conducted across two distinct test phases covering both high and low sales cycles. This approach ensured a comprehensive evaluation under varying traffic and business conditions.
The results were unequivocally positive: Speed Kit delivered a measurable uplift in performance and user engagement, achieving a 3.66% increase in conversion rate (CVR). The improvement was consistent across both test phases, demonstrating that the performance gains were not limited to specific periods but reflected a genuine enhancement of the customer experience.
This outcome confirms Speed Kit’s effectiveness in accelerating page loads and optimizing the digital shopping journey, ultimately supporting higher engagement and revenue potential within Zizzi’s already high-performance Salesforce Commerce Cloud environment.
Largest Contentful Paint (LCP)
Our proof of concept with Zizzi Denmark ApS demonstrated substantial improvements in website performance. Enabled pages loaded 47% faster, with a median speed improvement of 409 ms.
This performance uplift highlights Speed Kit’s ability to significantly accelerate page rendering and enhance the user experience, supporting Zizzi’s commitment to delivering a fast and seamless digital shopping journey across its high-performance commerce platform.
Closing Statement
For Zizzi performance is far more than a technical metric — it represents the digital expression of their modern and customer-focused brand promise. By integrating Speed Kit, Zizzi enhances the shopping journey from the very first interaction, delivering a fast, seamless, and highly responsive experience that mirrors the quality and accessibility of their fashion offering.
This improved responsiveness ensures that every visitor enjoys a smooth and engaging path to discovery, strengthening Zizzi’s position as a forward-thinking retailer that values both user experience and digital excellence in its international online storefront.
