CosmosSport.gr: Scalable tech meets seamless eCommerce experience

The case

Cosmos Group, a member of JD Sports Fashion Plc., is one of the largest omnichannel retail players in the Greek sportswear market operating 65 physical stores, 250+ pickup points, and 5 distinct online shops with differentiated brand identities.

Since 2019, Sleed has been the digital partner behind CosmosSport.gr, supporting the long-term technical development and performance evolution of the platform. The common goal? To create a stable, scalable, and high-performing eCommerce environment that delivers measurable growth.

The challenge

As competition intensified and customer expectations grew, it became essential to maintain momentum without compromising performance or stability. The challenge for Sleed was to continuously improve speed, usability, and backend functionality, while ensuring business continuity and platform resilience across heavy traffic periods and large-scale operations.

Our approach

Sleed combined its deep knowledge of Prestashop, high-impact eCommerce design and Data Services to drive transformation across multiple layers of CosmosSport.gr:

• Adidas Marketplace Integration – ERP & middleware connection for real-time purchase of Adidas products through CosmosSport.gr
  
• Infrastructure Optimization – Scalable database and web server upgrades to support peak-period performance
  
• Search & Gift Finder Implementation – 3rd-party search integration and custom-built Gift Finder module for smarter product discovery
  
• Checkout Flow Optimization – Unified pickup options (BoxNow, Geniki Taxydromiki, stores) with geolocation support
  
• Core Web Vitals & SEO – Technical SEO and performance improvements to elevate Lighthouse scores and organic presence
  
• Loyalty Integration – Implementation of the GoX rewards program across all Cosmos Sport Group e-shops
• Data Services – Ongoing support with reporting dashboards, KPI monitoring, and data-driven insights for continuous decision-making and optimization

The outcomes

The CosmosSport – Sleed partnership proves how technical consistency and a data-driven strategy can unlock measurable growth:

+4.9% increase in revenue
+47% improvement in PageSpeed
+14.8% increase in visits
+1.4% increase in orders

Stable support for ~1,000,000 monthly visits, without downtime

At Sleed, we’ve shown that when performance, infrastructure, and data come together, growth becomes inevitable.