Application Integration & API Engineering

Software Engineering & Modernisation

Reliably connect applications, platforms and services

jambit designs integration architectures, APIs and interfaces that enable existing and new systems to work together reliably. Our services range from analysing the system landscape and defining the architecture to technical implementation, operations, maintenance and continuous development.

Application Integration & API Engineering | jambit

Integration is an architectural challenge – not just a question of interfaces

Digital landscapes consist of custom applications, standard software, SaaS solutions, platforms, data sources and external services. These systems do not need to be standardised in order to work together reliably.

What matters is which systems need to interact, where responsibilities lie and what level of coupling is appropriate. Good integration therefore creates clear system boundaries and controlled access to data and functionality rather than simply establishing technical connections.

This makes integration an architectural decision – not a technical afterthought at the end of a project.

Connect systems, make functionality accessible or reduce dependencies?

Not every integration challenge requires the same approach. What matters is how systems need to work together, which capabilities need to be shared and where independence needs to be maintained.

Connect systems selectively

When applications need to exchange data or functionality reliably, direct integration can be the right approach. Clear responsibilities and well-defined interfaces ensure that the connection remains transparent and that changes do not unnecessarily affect other systems.

Systeme gezielt miteinander verbinden | jambit
Funktionen und Daten über APIs zugänglich machen | jambit

Make functionality and data accessible through APIs

Existing capabilities do not need to be redeveloped for every new product or service. Clearly defined APIs make it possible to provide and reuse data and functionality in a controlled way across other applications, platforms, partners or external services.

Reduce dependencies between systems

When independent applications are so tightly connected that changes can no longer be made independently, the coupling itself becomes a problem. Clear system boundaries and well-defined interfaces help make these dependencies easier to manage.

The right integration approach depends on business responsibilities, the required data and functionality, and how the system landscape is expected to evolve.

Abhängigkeiten zwischen Systemen reduzieren | jambit

From the system landscape to production-ready integration

Integration starts with a clear understanding of which systems are involved, which capabilities they provide and how they currently interact. Based on this, jambit designs an integration architecture and implements the required connections.

Understand the system landscape and dependencies

jambit assesses applications, platforms, data sources and services from both a business and technical perspective. This involves not only existing interfaces, but also processes, responsibilities and dependencies between systems.

Define system boundaries and integration architecture

Based on this assessment, jambit determines which systems remain responsible for specific data and functionality, where interfaces are required and which capabilities should be made available to other systems.

Implement APIs and interfaces

jambit designs and implements APIs and interfaces, modernises existing integrations and connects both internal and external systems and services. This turns the architecture into a production-ready, functional ecosystem.

Ensure reliable operations and continuous development

Integrations must continue to function reliably during ongoing operations and be adaptable in a controlled manner as requirements change. Testability, error handling and stable transitions are therefore considered from the outset.

Operations, maintenance and continuous technical development are also part of our services.

Backend engineering as the technical foundation

Integration architectures are often implemented through backend services, APIs and interfaces. Backend development provides the necessary services and makes business logic and data available to other applications and systems.

Integration enables connectivity across system boundaries

The value of good integration lies not in the number of interfaces, but in making data and functionality accessible across systems and integrating new systems in a controlled manner.

Continue using existing systems and investments

New digital requirements do not automatically mean that functioning applications need to be replaced. Integration makes it possible to continue using existing systems while selectively extending them with new capabilities.

Connect new applications, services and external systems more easily

Clearly defined interfaces make it easier to integrate new digital offerings, platforms, SaaS solutions or external systems into an existing landscape.

Make data and functionality reusable

APIs and structured integrations make it possible to provide existing capabilities for different applications and use cases instead of rebuilding them for every new project.

Keep integration complexity manageable

Every additional application creates new potential dependencies. A clear integration architecture helps keep system boundaries, responsibilities and connections transparent and manageable.

How to identify integration needs

Integration becomes a task in its own right when the problem lies not within a single system, but in how the overall digital landscape works together.

Processes break down between applications

When information has to be transferred manually, entered multiple times or moved between systems using workarounds, end-to-end integration is often missing.

Multiple applications require the same data and functionality

When products, services or internal applications repeatedly need to access the same capabilities, providing them in a controlled and reusable way through interfaces and APIs becomes increasingly important.

Changes create additional work in other systems

When changes to one application regularly require changes to interfaces or downstream systems, excessive dependencies between the systems involved can make further development more difficult.

Every new integration becomes a separate project

When new applications, SaaS solutions, platforms or partners repeatedly need to be connected through individual custom solutions, a robust integration architecture is often missing.

If, however, the main requirement is to make technical changes to an existing application itself, the focus is more likely to be on Application & Legacy Modernisation. If a specific digital capability is missing and needs to be developed as a custom solution, Custom Software Development may be the more appropriate starting point.

Application Integration & API Engineering in Practice

Integrating a Content Management System

For kicker.de, jambit supported the selection and integration of the Livingdocs content management system and developed additional components for editorial use.

Providing Services within a Connected Platform

For BMW ConnectedDrive, jambit developed platform services for BMW Online and supported the migration of existing data.

Standardising Interfaces through a Reference Platform

For CE4A, jambit designed and developed a shared reference platform to standardise interfaces with consumer electronics devices.

Assess your integration needs together

The right integration architecture depends on system boundaries, responsibilities and the capabilities that need to be shared across multiple applications.

jambit works with you to assess your integration needs, designs the architecture and takes responsibility from implementation through operations and maintenance to continuous development.

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