Amid stiff competition, shrinking margins and growing consumer demand for omnichannel fulfillment options, retail executives are evaluating digital transformation and other ways to drive growth. Yet struggles persist when it comes to inefficient legacy systems, fragmented customer profiles, supply chain disruption, decreasing sales volume and technical debt. Modern technology and processes are needed to overcome all of these barriers.

Omnichannel fulfillment refers to a unified, seamless order fulfillment method that’s consistent across all sales channels: websites, mobile apps, physical stores and third-party marketplaces. This strategy ensures that inventory is available via any channel and fulfillment option customers prefer, whether they shop online, in-store or move between touchpoints during their purchase journey. 

Survey results from 2025 show that nearly three-quarters of retail consumers are already omnichannel shoppers. Customers that fit this category deliver a 30% higher lifetime value than single-channel shoppers, and retailers supporting three or more channels are increasing consumer engagement by 250%, and retaining 90% more customers than single-channel competitors. 

It’s no surprise, therefore, that forward-thinking e-commerce businesses are moving away from rigid, monolithic systems, and instead are adopting more agile systems that combine a unified core with a composable framework. When it’s combined with an order-management system (OMS), the results are faster innovation, better resilience and tighter integration. 

OMS With a Composable Architecture

If you’re working with a traditional (or monolithic) commerce platform or OMS, your functionality is tightly woven into a single large codebase. When you add a new fulfillment method (such as buy online, pick up in store), it’s likely you’ll need to make substantial and risky changes throughout the system, including rework for order routing, inventory, returns and customer notifications. What’s more, testing is burdensome, upgrades are complicated, and rollbacks are hard. 

This rigidity not only slows the pace of innovation but also introduces the risk of unintended outcomes each time a modification is made. Subsequently, teams often find themselves spending a substantial amount of time and focus on making sure that changes don’t break something else. As customer expectations for omnichannel fulfillment evolve, the inability to react quickly can put your business at a serious disadvantage, because the tightly coupled nature of a monolithic OMS limits the ability to execute omnichannel fulfillment effectively.

Conversely, composable or modular OMS is designed as a set of flexible microservices, each communicating via application programming interfaces (APIs). Essentially, every fulfillment-related process (such as order routing for same-day pickup) is a standalone component.

With this type of system, individual services can be scaled separately. For example, if order volume surges during the holidays, the order-routing module can scale independently without impacting inventory or reporting modules. If you’re looking to expand into new sales channels, you can integrate your fulfillment options quickly — for instance, adding support for a third-party marketplace. Or, if you need to update or upgrade a specific component such as a real-time tracking feature for shipments, you can narrow your focus to deploying and iterating on the relevant module without taxing the OMS. 

Enable Omnichannel Fulfillment

Composable architecture is transforming OMS by emphasizing modularity, rapid configurability and API-first architecture. Using these principles, you can significantly improve your omnichannel fulfillment performance. 

A successful omnichannel OMS connects all channels into a unified view, providing real-time visibility for warehouses, stores and third-party providers. This approach prevents stockouts while allowing for flexible fulfillment and consistent processes for customer notifications and returns. When you apply modern OMS platforms that use advanced rule engines to route orders based on availability, speed and proximity, you optimize shipping windows and costs. 

Real-time synchronization capabilities ensure that orders and inventory levels are continuously updated across all channels. This prevents overselling, while enabling a consistent customer shopping experience regardless of where or how they shop. OMS should integrate via APIs with customer relationship management, point of sale, e-commerce, warehouse management and logistics providers.

Distributed fulfillment — including micro-fulfillment centers and stores — enables retailers to execute delivery options such as in-store, curbside pickup, ship-from-store and last-mile integration with third-party logistics providers.

Automated workflows improve operational efficiencies by reducing manual effort for order processing, shipment routing, and customer communication. When it comes to scalability and modularity (such as order routing during peak-season surges), being able to add new features without impacting the broader system is key for retail adaptability. 

Benefits of a Unified Core

While a pure composable approach offers maximum flexibility, it can also require significant technical expertise, and lead to a higher total cost of ownership. A more pragmatic approach is to use a platform that offers a pre-integrated unified core for the most critical functions across commerce, order management and subscriptions, while utilizing APIs to allow for composability where needed. Having this foundation reduces time-to-market and simplifies integration for essential functions.

At the same time, the composable framework provides the freedom to go headless with any front end and integrate any third-party service. You can easily pilot new services and features, such as alternative payment methods and upgrades to loyalty programs, without disrupting the broader system. By using modular microservices, you can execute A/B testing for fulfillment processes or customer-facing capabilities in isolation.

Because a composable approach releases you from vendor lock-in, you’re free to integrate best-in-class solutions for each capability. You can swap out components (such as a new tax collector or fraud-detection service) as market demands change, instead of being constrained by an all-in-one monolithic suite. This adaptability ensures that your tech environment remains flexible and forward-looking. 

With a unified core, data flows freely between components via APIs; this connectivity breaks down silos that are prevalent in legacy tech environments. Transparency brings a real-time holistic view that enables advanced analytics, more accurate demand forecasting, optimized inventory allocation, and enhanced fraud detection across all sales and fulfillment channels.

When you need to test, update, or roll back individual services, you can do it with minimal or no downtime. For global enterprises operating around-the-clock, this capability ensures a steady and reliable shopping and fulfillment experience by lowering the risks associated with emergency patches and major upgrades. 

Taking Practical Steps

Start by investing in a unified, pre-integrated core that can handle critical order management and commerce functions. By doing so, you can then prioritize and transition high-impact services such as pricing, inventory and customer data to microservices. This simplifies maintenance while streamlining future enhancements.

Build a developer-friendly environment by supporting your teams with detailed documentation, standardized software development kits (SDKs), and developer sandboxes to foster quick prototyping for new features. The use of components and vendors who support open standards and protocols promotes the interoperability needed to maximize flexibility and minimize custom integrations, and using cloud infrastructure supports elastic scaling, resilience and continuous delivery. 

As competition intensifies and consumer behaviors evolve, composable commerce, paired with a modern OMS, grants the ability to respond to trends, reduce costs and deliver on the seamless omnichannel experiences that customers demand.

Ram Venkataraman is chief executive officer of Kibo.