Future-Proof Development Frameworks for SAP and Beyond
The SAP Cloud Application Programming Model (CAP) is one of SAP’s core frameworks for developing modern applications—whether for SAP core systems, SAP AI, extensions, or entirely standalone solutions.
The framework is based on modern technologies and supports current programming languages such as Node.js and Java. In addition, it offers a variety of well-established libraries that accelerate and simplify development.
A central element of CAP is Core Data Services (CDS). This powerful tool enables declarative modeling of service definitions, data models, queries, and expressions. CDS allows models to be parsed from various source languages, transformed into a unified format, and then compiled into different target languages. Database connectivity is standardized and supports multiple database types, such as SAP HANA or relational databases from other providers.
CAP is complemented by numerous tools, SDKs, and plugins that one would expect from a modern framework. Many integrations are available out of the box—including support for data scientists working with Python. Using the SAP HANA ML Python Client API, Python models can be seamlessly integrated.
Development with CAP is supported both in the cloud (e.g., using SAP Business Application Studio) and locally (e.g., with Microsoft Visual Studio Code). In both environments, preconfigured wizards are available, enabling efficient and standardized application develop
SAP Build Code further accelerates development: AI-powered assistants support the creation and ongoing enhancement of CAP projects. This functionality is expected to become significantly more important in the future.
SAP CAP provides the technological foundation to extend all SAP applications within the SAP Business Suite (such as SAP S/4HANA, SAP SuccessFactors, SAP Ariba, etc.) using a central, unified, and reusable framework.
The strategic relevance of the CAP framework is also emphasized in the official document SAP’s Big Picture Architecture—particularly in the areas of best-in-class application development, automation, and custom business AI.
This also highlights the powerful potential that lies in the continued evolution of the framework.
Frontend and Backend – Unified Development
In today’s SAP ERP environment—especially in connection with SAP Fiori (UI5)—a clear separation between backend and frontend is required. Traditionally, ABAP is used in the backend, while the frontend is developed using JavaScript (specifically SAPUI5/OpenUI5). This means that two different technologies must be mastered and maintained to build a complete application.
Modern approaches like the SAP Cloud Application Programming Model (CAP) offer a solution. By using JavaScript or Node.js, both the backend and frontend can be developed with the same programming language. This not only simplifies development and maintenance but also reduces overall complexity throughout the development process. Developers can focus on a common language and avoid the friction caused by technological boundaries.
With JavaScript, it is now possible to build complete, scalable cloud applications—from data modeling and business logic to the user interface. Especially within the CAP environment, this offers major advantages in terms of speed, reusability, and team agility.
Consistent Use of Technology Across the SAP BTP
Looking beyond the SAP Cloud Application Programming Model (CAP) to other services within the SAP Business Technology Platform (SAP BTP), a clear trend emerges: JavaScript (or TypeScript) is becoming the central language for extension, integration, and automation across a wide range of SAP services.
For example, in the SAP Integration Suite, JavaScript or Groovy is required for extension scenarios—particularly in areas like message mappings or custom adapter logic. Depending on the use case, Java is also used for more complex extensions.
In the SAP Build ecosystem, JavaScript has now become the standard language:
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SAP offers specific SDKs to ensure consistent and efficient development on the BTP:
SAP is also fully embracing modern languages and libraries in the AI domain. For SAP AI Core and SAP AI Launchpad, the following SDKs and libraries are available:
In addition, CAP developers already have access to CAP LLM plugins, which enable the integration of Large Language Models (LLMs) into their own applications—a critical step toward AI-driven development and intelligent automation in the SAP ecosystem.
Clean Core and Extension
For our extensions within the SAP ERP environment, we deliberately follow the Clean Core principle. We leverage modern extension capabilities in SAP S/4HANA Cloud—specifically through the SAP S/4HANA Cloud ABAP Environment and the RESTful ABAP Programming Model (RAP). This environment provides powerful, future-proof features directly within the SAP core—without the need for modifications—and offers significantly more efficient and streamlined approaches on the SAP BTP.
This enables the implementation of complex SAP ERP core business logic, the extension of existing business objects, and integration into both existing Fiori applications and the SAP BTP—in a clean and sustainable manner, all within the ERP system.
For side-by-side extensions, we consistently rely on the SAP Cloud Application Programming Model (CAP)—and benefit from the many advantages it offers: a unified technology stack, modern languages (JavaScript or Java), a declarative data model with CDS, automatic service generation, integrated security, and much more. Especially in combination with SAP Build Code and AI-assisted development capabilities, CAP provides a powerful platform for modern cloud development.
We are at the brink of a technological shift—many of our customers are currently migrating their custom developments and extensions from classic SAP ERP to SAP S/4HANA. This raises an important question: if the code has to be rewritten anyway, why not take the opportunity to make a technological leap? Why cling to legacy technologies when modern frameworks like CAP on the BTP offer better, more flexible, and future-ready alternatives?
Community
So much for the technical possibilities. But one crucial point is often overlooked: the developer community around SAP technologies.
Especially in the traditional SAP ABAP environment, a clear trend has been emerging for years. Available resources remain highly limited and are still largely concentrated in the SAP ERP space. Many experienced R/3 developers are gradually retiring. The next generation is missing—and there are structural reasons for that.
In Switzerland—with its proven dual education system—as well as in universities and technical colleges, ABAP is barely taught, if at all. Instead, the focus is on modern, industry-agnostic programming languages such as Java, JavaScript, Python, or Go. These languages offer students significantly broader prospects—not only technologically, but also in terms of industries and career opportunities.
As a result, it is becoming increasingly difficult for companies to attract new talent for ABAP-based development. At the same time, the community around modern technologies is many times larger—with active networks, open-source projects, international collaboration, and a strong culture of learning. This opens up a very different kind of access to the world of business applications for young developers.
With technologies like SAP BTP and the SAP Cloud Application Programming Model (CAP), SAP is opening the door to the modern developer world:
This makes the entry point far more attractive—not only for us as a company but also for new generations of developers. Because modern tools, cloud platforms, AI capabilities, and open technologies are exactly what today’s developers expect. SAP CAP hits the mark—technologically, strategically, and from a community perspective.
Our answer to this is based on facts: We combine the best of both worlds—In-App development using the SAP S/4HANA Cloud ABAP Environment, and Side-by-Side development with CAP on the SAP BTP—creating solutions that are not only future-proof, but also maintainable, extendable, and AI-ready.
Now it’s up to you to decide which strategy you want to pursue.
We’ve chosen ours.
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