Switch without a restart: freshcells migrates S-Reisewelt to Peakwork during live operations
Technology partner switches the core inventory source of the Sparkasse travel portal while keeping its 300+ tenant platform fully intact
Düsseldorf, 23 September 2026 – A new offer provider without rebuilding the portal: freshcells systems engineering has connected S-Reisewelt, operated by S-Markt & Mehrwert, the loyalty solutions provider within the Sparkassen-Finanzgruppe and operator of the central customer loyalty platform S-Vorteilswelt, to the Peakwork leisure travel network during ongoing operations. For users and connected Sparkassen, the transition took place seamlessly behind the scenes. A relaunch of the modular platform was entirely unnecessary.
Through the connection to Peakwork, S-Reisewelt gains immediate access to the extensive travel inventories of numerous major tour operators. While Peakwork acts as the new inventory provider, freshcells was responsible as the technology partner for seamlessly migrating the existing sales platform. Four years of development preserved The key challenge: S-Reisewelt is not a newly developed booking platform. Over the past four years, it has been continuously expanded and customized, featuring bespoke functionality alongside a tenant management system for more than 300 connected partners. Instead of rebuilding this sophisticated infrastructure from scratch, freshcells preserved the existing platform and integrated Peakwork in the background. This was made possible by TravelSandbox®, proprietary technology developed by freshcells whose modular architecture decouples the digital sales platform from specific travel offer sources. "Changing an offer supplier should never force a travel company to rebuild its entire digital sales platform. That is precisely why TravelSandbox® was built: to enable seamless switching between product sources without restructuring the underlying system architecture," explains Marvin Strenger, COO of freshcells systems engineering. "For S-Reisewelt, we integrated the new Peakwork interface into the existing platform without requiring a relaunch, without causing downtime, and without forfeiting any custom features." Decoupling product sources from the sales platform This technical independence is becoming increasingly critical for travel companies. Booking platforms undergo continuous development over many years to meet complex business requirements. When a digital sales interface is tightly coupled to a single inventory provider, switching vendors often triggers substantial and unwanted follow-up investments. The multi-source technology from freshcells sits between the sales platform and data providers, enabling different sources to be connected or replaced without redeveloping the core platform. The live migration of S-Reisewelt successfully demonstrates this modular principle in practice. Furthermore, S-Markt & Mehrwert leveraged the provider transition to introduce additional platform enhancements. In parallel with the Peakwork integration, freshcells implemented a new ratings and review service from HolidayCheck alongside several custom platform features. "We are extremely pleased with the smooth transition during live operations. Through the new interface, we can access travel inventories faster and more efficiently," says Matthias Deppe, Team Lead Online and Digital S-Reisewelt at S-Markt & Mehrwert. "This allows S-Reisewelt customers to find the right offer even more effortlessly." Investment protection instead of a relaunch For freshcells, this project represents more than a standard system integration. It showcases how travel sales platforms can evolve technologically without discarding prior investments in frontends, features, content, and search engine optimization. "In tourism, product sources, interfaces, and distribution models are constantly evolving," Strenger adds. "A modern platform should not be locked into a single provider. Our mission is to give travel businesses the freedom to upgrade their technological foundation without having to start over every time."
Through the connection to Peakwork, S-Reisewelt gains immediate access to the extensive travel inventories of numerous major tour operators. While Peakwork acts as the new inventory provider, freshcells was responsible as the technology partner for seamlessly migrating the existing sales platform. Four years of development preserved The key challenge: S-Reisewelt is not a newly developed booking platform. Over the past four years, it has been continuously expanded and customized, featuring bespoke functionality alongside a tenant management system for more than 300 connected partners. Instead of rebuilding this sophisticated infrastructure from scratch, freshcells preserved the existing platform and integrated Peakwork in the background. This was made possible by TravelSandbox®, proprietary technology developed by freshcells whose modular architecture decouples the digital sales platform from specific travel offer sources. "Changing an offer supplier should never force a travel company to rebuild its entire digital sales platform. That is precisely why TravelSandbox® was built: to enable seamless switching between product sources without restructuring the underlying system architecture," explains Marvin Strenger, COO of freshcells systems engineering. "For S-Reisewelt, we integrated the new Peakwork interface into the existing platform without requiring a relaunch, without causing downtime, and without forfeiting any custom features." Decoupling product sources from the sales platform This technical independence is becoming increasingly critical for travel companies. Booking platforms undergo continuous development over many years to meet complex business requirements. When a digital sales interface is tightly coupled to a single inventory provider, switching vendors often triggers substantial and unwanted follow-up investments. The multi-source technology from freshcells sits between the sales platform and data providers, enabling different sources to be connected or replaced without redeveloping the core platform. The live migration of S-Reisewelt successfully demonstrates this modular principle in practice. Furthermore, S-Markt & Mehrwert leveraged the provider transition to introduce additional platform enhancements. In parallel with the Peakwork integration, freshcells implemented a new ratings and review service from HolidayCheck alongside several custom platform features. "We are extremely pleased with the smooth transition during live operations. Through the new interface, we can access travel inventories faster and more efficiently," says Matthias Deppe, Team Lead Online and Digital S-Reisewelt at S-Markt & Mehrwert. "This allows S-Reisewelt customers to find the right offer even more effortlessly." Investment protection instead of a relaunch For freshcells, this project represents more than a standard system integration. It showcases how travel sales platforms can evolve technologically without discarding prior investments in frontends, features, content, and search engine optimization. "In tourism, product sources, interfaces, and distribution models are constantly evolving," Strenger adds. "A modern platform should not be locked into a single provider. Our mission is to give travel businesses the freedom to upgrade their technological foundation without having to start over every time."
About freshcells systems engineering
freshcells systems engineering GmbH, headquartered in Düsseldorf, is a software and consulting company specializing in complex digital platforms and e-commerce solutions. Since 2005, freshcells has supported organizations in conceptualizing, developing, and continuously expanding their digital business models. A key focus is tourism, where freshcells builds high-performance, flexible technology for digital travel sales. With TravelSandbox®, the company provides a modular e-commerce platform that connects diverse travel products, data sources, booking engines, brands, and sales channels. Its portfolio also encompasses technology consulting, software engineering, UX/UI design, systems architecture and integration, and content management solutions. Over 100 companies across tourism and other industries rely on freshcells technology. Founder, owner, and Managing Director of freshcells systems engineering is Tom Hülser.
About S-Markt & Mehrwert
With more than 1,100 employees across seven locations, S-Markt & Mehrwert is a key service provider within the Sparkassen-Finanzgruppe, developing forward-thinking solutions across customer loyalty, customer service, and digital products. The company delivers end-to-end solutions and operates S-Vorteilswelt, the central loyalty platform for Sparkassen. S-Markt & Mehrwert specializes in customer acquisition, retention, service management, and customer satisfaction measurement. Its modular portfolio is tailored to the specific needs of Sparkassen and their partners, helping them achieve their strategic objectives.
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