Smart checkouts, strong strategies: what modern POS systems need to deliver today

Patrick Kruschinski from Snabble on Modular Platforms, Technological Drivers, and the Role of POS in Connected Retail.

Today’s demand is for open, cloud-native platforms that integrate seamlessly into existing IT environments and allow for rapid deployment of new services. Patrick Kruschinski, Lead Customer Advisor at Snabble, gave us in-depth insights into the transformation of checkout systems – from technical architecture and security standards to international rollouts and AI-powered self-checkout. Using autonomous store concepts as an example, he shows how the POS is no longer just a transaction point but a strategic driver of change and innovation in retail and why flexibility is the key factor.

1. What are the most important technological requirements for a future-ready POS system?

Kruschinski: Future-ready POS solutions are modular, API-first, and cloud-native. They integrate smoothly into existing IT infrastructures and enable a connected shopping experience across all channels. A POS system must be scalable, adaptable, and a clear enabler of operational efficiency and customer engagement. Retailers no longer need rigid checkout systems – they need flexible platforms that support fast implementation of new services.

2. How is the system architecture of modern POS solutions changing compared to traditional POS systems?

Kruschinski: Traditional checkouts were often monolithic and isolated – difficult to integrate and hardly customizable. Today, retailers rely on modular architectures. This structure allows innovations to be implemented more quickly with less use of resources. Instead of a stand-alone solution, a retailer's POS solution is integrated into the enterprise architecture, which makes retailers future-proof, independent and significantly more agile.

3. How can a POS system be scaled without sacrificing flexibility or performance – especially with growing store networks or in an international rollout?

Kruschinski: The scalability of POS systems depends largely on the architecture. A clear separation between the core system and extensions is crucial in order to be able to scale both vertically and horizontally – for example via cloud infrastructures such as AWS, GCP or Azure. Elements such as load balancing, flexible deployment (e.g. cloud or edge) and continuous monitoring help to ensure stable performance even during international rollouts.

It is also advisable to centralize the business logic in the backend and keep frontend components flexible. This makes it easier to map regional requirements, different hardware or specific use cases.

Another aspect that is often underestimated with larger branch networks is the ongoing cost of operation, maintenance and support. A scalable solution should therefore not only be able to grow technically, but also offer processes that minimize administrative effort and save resources in day-to-day business.

4. What role does the POS system play today in interaction with CRM, inventory management and e-commerce platforms?

Kruschinski: For CRM data, stock levels, prices or personalized offers to be effective at the point of sale, real-time communication across all systems is required. Today, the POS system is no longer an isolated touchpoint, but an integral part of the omnichannel strategy

If the POS is not seamlessly networked with e-commerce, merchandise management and loyalty systems, data silos are created – and thus inconsistencies that slow down dynamic pricing, personalization or cross-channel services. A modern POS system is therefore one thing above all: the central hub for reliable, immediately available checkout data and the basis for a seamless and personalized customer experience.

5. How do modern POS architectures deal with issues such as data protection, IT security and compliance – also with regard to international markets?

Kruschinski: With the increasing number of cyber attacks, IT security in retail is becoming an even greater focus. Especially at the POS, where sensitive payment data is processed on a daily basis, retailers should rely on systems that have security firmly anchored in their architecture, for example through DevSecOps, regular penetration tests and a clean separation of data and application.

Compliance also plays a key role for internationally active retailers. Systems must be flexible enough to reliably map country-specific requirements. Those who rely on a modern, cloud-based platform with clear interfaces will be better positioned in the long term – technically, legally and operationally.

6. Which developments – for example in the areas of AI, IoT or payment – will significantly shape the architecture and role of POS systems in the next five years?

Kruschinski: In the next few years, artificial intelligence will play a central role, e.g. in merchandise recognition or loss prevention, for example through automatic anomaly detection at self-checkouts.

In the payment sector, mobile payment will continue to grow, even if technologies such as SoftPOS are still niche topics today, they open the door to fully mobile checkout processes, especially in pop-up or service-centered concepts.

In terms of technology, this means that POS architectures must be open, expandable and capable of quickly integrating new devices and data-driven services, whether camera, sensor technology or AI services. The requirements are increasing, but so are the opportunities for brick-and-mortar retailers.

7. How can a POS system help to make brick-and-mortar retail fit for the future – not only technically, but also in terms of customer experience and efficiency?

Kruschinski: When it comes to future viability, there is no way around the technological basis. It is the decisive lever for efficiency and customer experience – and for many retailers it is currently still a hurdle that needs to be overcome. With a modern POS platform, new technologies such as AI or innovative store formats can be introduced much faster. This saves resources, accelerates implementation and noticeably shortens time-to-market.

At the same time, the shopping experience benefits: thanks to real-time communication and the integration of all touchpoints, a consistent 360° view of the customer is created – the basis for better advice, personalized offers and a consistent omnichannel experience.

Whether traditional checkout, mobile POS or self-checkout – modern systems enable shorter waiting times, higher throughput and more time for real interaction with customers. In this way, technology is transformed from a drag into a real enabler: for retailers who work more efficiently, sell more individually and remain competitive in the long term.

8. Can you describe a specific use case in which the POS system made a decisive contribution to the solution?

Kruschinski: A good example is teo – an innovative 24/7 store concept operated by Smart Retail Solutions GmbH. Snabble acts as a central checkout platform through which all transactions are processed – regardless of whether customers shop via app, self-checkout or Grab & Go.

The special feature here is that the stores run completely autonomously – meaning that security, availability and stable integrations with partners such as tobaccoland, autonomo or smoothr/coolr are absolutely crucial. Our platform does exactly that. It connects all services and systems in real time, ensures a continuous flow of data and enables new forms of shopping – fast, convenient and without waiting times.

The result is a shopping experience that is maximally customer-oriented and at the same time sets new efficiency standards in retail – and for this we were jointly honored with the reta-award.

9. What insights from this project can be transferred to other retail companies – and what was perhaps surprising or particularly instructive?

Kruschinski: The most important thing to remember is that architecture is everything. A MACH-based platform provides the flexibility needed to efficiently meet even the most complex requirements. MACH stands for Microservices, API-first, Cloud-native and Headless. This is evident in innovative store formats, such as those implemented by Teo, and in international projects, such as those with Gebr. Heinemann, where factors such as multilingualism, varying payment processes and boarding pass scanning come into play.

Many underestimate the fact that a modular, cloud-based POS architecture is just the beginning in terms of innovation capability. Traditional systems quickly reach their limits. The most important factor is not the range of features, but the speed and flexibility with which new requirements can be implemented and adapted to market changes.

The interview with Patrick Kruschinski makes it clear that a POS system today is much more than just technology at the checkout. It is a central building block for innovation, efficiency and customer proximity in networked retail. The most important takeaways:

• Modular, API-first, cloud-native, and headless: Future-ready POS systems are flexibly integrable and grow with the business.
• Omnichannel needs integration: The POS is no longer an isolated touchpoint, but part of a connected ecosystem with CRM, ERP, and e-commerce platforms.
• Scalable by design: Clean system architecture enables powerful, efficient international rollouts.
• Technology as a driver: AI, IoT, and mobile payment are redefining the role of the POS and unlocking new design possibilities.
• Architecture matters: Projects like teo prove that open, extensible platforms are the foundation for new store formats and data-driven services.